McNemar Test Research Articles

Prevalence of Bronchodilator Responsiveness: A Comparison of Old Versus New Criteria.

In 2021, the European Respiratory Society (ERS)/American Thoracic Society (ATS) guidelines issued a new definition of bronchodilator responsiveness, which is now defined as an increase in FEV1 or FVC by ≥ 10% of the predicted FEV1 or FVC. The impact of this revised definition on bronchodilator responsiveness prevalence has been relatively understudied. We retrospectively analyzed data from 2,696 subjects who performed pulmonary function testing at the University of Iowa from 1997 to 2018. We compared the prevalence of bronchodilator responsiveness by using the 2005 (FEV1 or FVC increase ≥ 12% baseline value and ≥ 200 mL) and 2021 (FEV1 or FVC increase ≥ 200 mL and ≥ 12% of baseline value) ERS/ATS definitions, across several different respiratory diagnosis categories. We compared the prevalence of bronchodilator responsiveness using the 2 definitions by applying the McNemar test and assessed concordance of bronchodilator responsiveness by calculating kappa coefficients for the whole study population and within each diagnosis category. The prevalence of bronchodilator responsiveness increased from 9% when using the 2005 ERS/ATS definition to 16% when using the 2021 definition within the entire cohort and also within each respiratory diagnosis category. In the subjects with normal pre-bronchodilator spirometry, there was a low prevalence of bronchodilator responsiveness (3%) when using the 2005 definition, and the prevalence increased (8%) when using the 2021 definition. In the subjects with normal pre-bronchodilator spirometry and FEV1 Z score ≥ 0, 2% had bronchodilator responsivness according to the 2005 guidelines, whereas 7% had bronchodilator responsiveness according to the 2021 guidelines. The prevalence of bronchodilator responsiveness increased when using the new 2021 ERS/ATS definition compared with the 2005 definition. In the subjects with normal pre-bronchodilator spirometry, the prevalence of bronchodilator responsiveness increased when using the 2021 definition, in particular, among those with an FEV1 Z score ≥ 0, which raises concerns for overdiagnosis. Future investigations should examine the correlation of bronchodilator responsiveness with clinical outcomes in this group of subjects.

A Large Language Model to Detect Negated Expressions in Radiology Reports.

Natural language processing (NLP) is crucial to extract information accurately from unstructured text to provide insights for clinical decision-making, quality improvement, and medical research. This study compared the performance of a rule-based NLP system and a medical-domain transformer-based model to detect negated concepts in radiology reports. Using a corpus of 984 de-identified radiology reports from a large U.S.-based academic health system (1000 consecutive reports, excluding 16 duplicates), the investigators compared the rule-based medspaCy system and the Clinical Assertion and Negation Classification Bidirectional Encoder Representations from Transformers (CAN-BERT) system to detect negated expressions of terms from RadLex, the Unified Medical Language System Metathesaurus, and the Radiology Gamuts Ontology. Power analysis determined a sample size of 382 terms to achieve α = 0.05 and β = 0.8 for McNemar's test; based on an estimate of 15% negated terms, 2800 randomly selected terms were annotated manually as negated or not negated. Precision, recall, and F1 of the two models were compared using McNemar's test. Of the 2800 terms, 387 (13.8%) were negated. For negation detection, medspaCy attained a recall of 0.795, precision of 0.356, and F1 of 0.492. CAN-BERT achieved a recall of 0.785, precision of 0.768, and F1 of 0.777. Although recall was not significantly different, CAN-BERT had significantly better precision (χ2 = 304.64; p < 0.001). The transformer-based CAN-BERT model detected negated terms in radiology reports with high precision and recall; its precision significantly exceeded that of the rule-based medspaCy system. Use of this system will improve data extraction from textual reports to support information retrieval, AI model training, and discovery of causal relationships.

Impact of a health literacy sensitive model of care in outpatient nephrology dietetic clinics.

Inadequate health literacy in people with chronic kidney disease is associated with poorer disease management and greater complications. Adherence to the renal diet is known to be suboptimal and patient feedback about the renal diet suggests that patients leave nephrology clinics feeling confused. The present study aimed to evaluate the impact of a health literacy sensitive model of care (MOC) in outpatient nephrology dietetic clinics. This quasi-experimental non-randomised pre-post study recruited adults attending three renal dietitian clinics. The revised MOC consisted of a renal diet question prompt sheet, teachback, and plain language materials and instructions. Outcomes assessed included clinical, dietary, patient-reported satisfaction and quality of life. Differences between and within groups were analysed using paired t-tests, independent sample t-tests (or non-parametric equivalent), chi-squared and McNemar's tests. Linear mixed models evaluated change in total diet quality score, fruit, vegetable, protein and dairy intake with time as a fixed effect and a random subject specific effect. Fail to attend rates at the initial appointments were lower in the revised MOC (21.5% vs. 9.1%). The revised MOC was associated with significantly improved fruit (p = 0.03) and vegetable (p = 0.003) intake and an improved proportion with adequate diet quality (p = 0.03). These impacts were of moderate effect size (d = 0.5, 95% confidence interval = 0.0-1.0). The revised MOC was also associated with greater satisfaction at baseline (p = 0.04) and higher acceptability scores for all questions at the review appointments. Quality of life improved clinically but not significantly in the revised MOC (p = 0.92). This low-cost health literacy sensitive intervention is a promising strategy to improve fruit and vegetable intake in adults attending renal dietitian clinics. Further research to determine fidelity of teachback use and cost utility analysis would be beneficial. Larger scale trials powered to detect changes in quality of life would also be informative.

Transvaginal cervical cerclage – How well do surgeons assess their own procedures?

IntroductionIn women with cervical incompetence, transvaginal cerclage may help prevent preterm birth. However, training for this procedure poses challenges due to the low number of cases and difficulties in visualizing the operative field. Furthermore, the objective criteria for a successful cerclage procedure are not well-described. Quality assessment relies heavily on self-assessment rather than objective criteria and feedback. To address this issue, training on a simulator may offer a solution. We aimed to objectively assess surgical performance and compare it to the self-assessed performance in transvaginal cerclage procedures. Materials and methodsDuring the Nordic Federation of Obstetrics and Gynecology (NFOG) congress in 2023, surgeons proficient in transvaginal cerclage procedures performed a transvaginal cerclage on a simulator. To compare the observed and self-assessed outcomes we obtained measurements on the cerclage height and number of bites from the detachable cervix, and from computed tomography scans we analyzed suture bite depth, reduction of cervix surface area, and whether cerclages had perforated the cervical canal. The same outcomes were self-assessed by each participant after the cerclage procedure. We visualized the continuous paired data in a Bland-Altman plot and compared these data with a paired t-test. Paired binary data was analyzed using McNemars test. Results29 participants from eight different nationalities performed one transvaginal cerclage each. The mean height of the cerclage was 26.8 mm (SD 9 mm) and mean depth was 6.5 mm (SD 1.9 mm) across a mean of 4.1 (SD 0.8) bites. The mean reduction of the cervix surface area was 7.6 % (SD 5.9 %). Two sutures perforated the cervical canal. The participants significantly underestimated the height of their cerclage with a mean difference of 6.0 mm (95 % CI 2.1–9.9), (p 0.002), between the observed and the self-assessed height, but otherwise revealed good self-assessment of their performed procedure. ConclusionsOverall, the experienced cerclage surgeons showed a genuine insight into their surgical performance of a transvaginal cerclage. These results could warrant development of a procedural guidelines with objective measures, now reassured that surgeons are capable of self-assessing their procedures.

Comparison of the indirect immunofluorescence assay and a commercial ELISA to detect KSHV antibodies.

Kaposi's sarcoma-associated herpesvirus (KSHV) is an oncogenic virus involved in several diseases. The gold standard for KSHV sero diagnosis remains the indirect immunofluorescence assay (IFA), which is time-consuming and operator-dependent. We compared this method with an enzyme-linked immunosorbent assay (ELISA) targeting solubilized KSHV whole-genome extract among positive (n = 49, including 76% of HIV-infected patients) and negative (n = 14) control groups. We also included 14 sera with equivocal IFA results. ELISA showed better performance in detecting KSHV antibodies (McNemar's test, P = 0.0455). The sensitivity and specificity of both methods were 79% (64-89) and 100% (66-100) for the IFA, respectively, and 94% (83-99) and 100% (66-100) for ELISA, respectively. All IFA equivocal results were either negative or positive with ELISA. ELISA is more reliable and could be a good alternative for determining KSHV serological status, particularly in the context of immunocompromised patients and equivocal serology with the IFA.IMPORTANCEKaposi's sarcoma-associated herpesvirus (KSHV) sero status remains challenging because no perfect reference is available for the detection of KSHV antibodies. The current gold-standard method, the indirect immunofluorescence assay (IFA), has a very good specificity of close to 100%, but a lower sensitivity of around 80-85%, which decreases to 64-67% in immunocompromised patients. Additionally, this method is time-consuming and operator-dependent compared with new serological assays such as the enzyme-linked immunosorbent assay (ELISA). Thus, further research is still needed to improve KSHV sero diagnosis. Here, we compare the KSHV IgG ELISA kit assay (Advanced Biotechnologies Inc) with the gold-standard IFA, targeting the LANA-1 protein from latent BC-3 cell lines.

Abstract B114: Enhancing understanding and engagement: Investigating the impact of education on clinical trial participation

Abstract Institutions: Thomas Jefferson University Department of Oncology Funded by: NIH/NCI 3P30CA056036-22S1 Background Clinical trials (CT) advance knowledge in cancer care. Access to CT may be facilitated by patient knowledge. We evaluated the impact of a tailored CT educational video intervention via a pre- and post-test survey on CT interest and enrollment. Methods Participants included persons with cancer (PwCa) as well as persons without cancer—general population (GP). A McNemar test was used to assess the differences in survey scores for patients knowledge (11 questions) and intention-to-participate in future CT (6 questions). Results 363 (GP) and 116 (PwCa) participated; 178 and 55 participants completed both pre- and post-surveys, respectively. GP: 148 (70%) men, 58 (28%) women, 2 (1%) transgender, 2 (1%) non-binary; white, non-Latinx 125 (60%), Black 60 (29%), Asian 2 (1%), Latinx 52 (25%). PwCa: 48 (47%) men, 48 (53%) women; white, non-Latinx 71 (79%), Black 8 (9%), Asian 7 (7%), Latinx 5 (6%).The mean age was 30 yrs (sd: 7 yrs) [GP] and 55 yrs (sd: 17.8 yrs) [PwCa]. PwCa scores significantly improved for “In a CT, a patient will always get the new medicine or treatment being tested” (p=0.003). GP scores significantly improved for “You can only join a CT after you have tried all other options (p=0.002)”, “CTs test whether a new medicine or treatment works (p=0.031)” and “Once I sign a consent form, I must stay in the CT until my doctor tells me I'm done (p=0.0001).” The intention to participate in CT improved significantly in PwCa (p&amp;lt;0.05). The intention to gain more information about CT from their physicians and discussing CT with family (p&amp;lt;0.05) improved significantly in GP. Conclusions The tailored educational intervention significantly impacted PwCa’s intention to participate in CT and GP’s intention to learn more about CT and to share the CT information learned. The GP group was more diverse. Ongoing research is monitoring whether PwCa participants enroll in a CT, thereby assessing the long-term impact of the educational intervention on decision-making regarding CT participation taking into account CT availability and eligibility. Citation Format: Jesutomisola Onafowokan, FNU Nikita, Iqra Siddiqui, Ana Maria Lopez. Enhancing understanding and engagement: Investigating the impact of education on clinical trial participation [abstract]. In: Proceedings of the 17th AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2024 Sep 21-24; Los Angeles, CA. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2024;33(9 Suppl):Abstract nr B114.

Multi-marker analysis of circulating tumor cells in localized intermediate/high-risk and metastatic prostate cancer

AbstractCirculating tumor cells (CTCs) are an established prognostic marker in metastatic prostate cancer (PrC) but have received little attention in localized high-risk disease. Peripheral blood was obtained from patients with early intermediate and high-risk PrC (n = 15) at baseline, after radiotherapy, and during follow-up, as well as from metastatic PrC patients (n = 23). CTCs were enriched using the microfluidic Parsortix® technology. CTC-related marker were quantified with qPCR and RNA in-situ hybridization (ISH). Positivity and associations to clinical parameters were assessed using McNemar test, Fisher Exact test or log-rank test. The overall positivity was high in both cohorts (87.0% metastatic vs. 66.7% early at baseline). A high concordance of qPCR and RNA ISH was achieved. In metastatic PrC, PSA and PSMA were prognostic for shorter overall survival. In early PrC patients, an increase of positive transcripts per blood sample was observed from before to after radiation therapy, while a decrease of positive markers was observed during follow-up. CTC analysis using the investigated qPCR marker panel serves as tool for achieving high detection rates of PrC patient samples even in localized disease. RNA ISH offers the advantage of confirming these markers at the single cell level. Employing the clinically relevant marker PSMA, our CTC approach can be used for diagnostic purposes to screen patients profiting from PSMA-directed PET-CT or PSMA-targeted therapy.

Abstract B110: A community-based educational intervention to improve colorectal cancer screening

Abstract Background: Colorectal cancer (CRC) is the 3rd leading cause of cancer death in the US. Early detection through screening increases survival and decreases mortality. Approximately 59% of eligible adults in the US are up to date on CRC screening with lower rates in minoritized communities. We report on a tailored a CRC screening educational intervention focused on improving CRC screening rates in the Black, Latinx, and Chinese immigrant communities that we serve. Methods: An educational intervention utilizing NCI’s Screen to Save CRC colorectal cancer educational materials was tailored through key contact interviews and focus groups with Black, Latinx, and Chinese immigrant communities and made available in Spanish/English/Mandarin. Invitations to participate were primarily disseminated through weekly email blasts to adults (persons age18+). A pre- and post-intervention survey was used to assess patient knowledge and intentions to screen. Persons completing the post-survey received a FIT test for CRC screening with a FIT. We used McNemar test to compare the results pre- and post-survey. Results: Of the 300 participants who completed the post-survey, 117 (39%) were male, and 183 were female (61%). 231 identified as white non-Latinx (77%), 48 (16%) Black, 3 (9%) Asians. 241 (80.3%) completed college. 186 (62%) had received CRC screening—176 (95%) by colonoscopy, 31 (17%) by fecal immunochemical test FIT prior to enrollment. 240 (80%) were eligible for FIT by age. 137 (83%) were interested in receiving FIT. Primary reasons for not pursuing FIT test included choosing to pursue a colonoscopy or having had a recent normal colonoscopy. 88 expressed interest pursuing FIT; 66 (75%) participants signed FIT consent form, and 41 (62%) completed FIT. Knowledge regarding CRC screening improved for the following questions: CRC starts in liver (p=0.0082), small intestine (p&amp;lt;0.0001) and colon and/or rectum (p=0.0027), “FIT checks the stool for fat (p&amp;lt;0.0001), tumors (p&amp;lt;0.0001) and polyps (p=0.0067),” “Risk factors for CRC are poor diet (p=0.0019), smoking/tobacco use (p=0.0148), lack of physical activity(p=0.0012),” “Lynch syndrome is a disorder that runs in families and increases my chances of developing CRC (p&amp;lt;0.0001)” and “Increasing my physical activity will not lower my chances of developing CRC (p=0.0019).” 153 (60.24%) said the education session was great and 91 (36.25%) said it was good. When asked if they would recommend this education session to family and friends, more than 80% of participants agreed. Conclusions: CRC education video helped increase patient knowledge regarding CRC, specifically about risk factors and improved knowledge regarding FIT as a CRC screening modality. Citation Format: Iqra Siddiqui, FNU Nikita, Ana Maria Lopez. A community-based educational intervention to improve colorectal cancer screening [abstract]. In: Proceedings of the 17th AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2024 Sep 21-24; Los Angeles, CA. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2024;33(9 Suppl):Abstract nr B110.

Receiving a Pathogenic Variant in a Population Breast Cancer Screening Trial: A Mixed Method Study.

Risk-based breast cancer screening aims to address persistent high morbidity and mortality. This study examined the experience of participants in the Women Informed to Screen Depending on Measures of Risk (WISDOM) trial who received a pathogenic variant in one of nine high or moderate penetrance breast cancer genes. Participants completed a brief survey (n = 181) immediately following the results disclosure and 1 year later. Descriptive statistics were computed and comparisons between participants at different risk levels were performed using Fisher's exact and McNemar's tests. Analysis of qualitative interviews (n = 42) at 2-4 weeks and 6 months post-results disclosure compared responses at the 2 time points and explained and elaborated on the survey data. 66.3% of survey respondents felt very or moderately prepared to receive genomic results. At the T1 survey, 80.7% of participants had shared the genetic result with a blood relative, increasing to 88.4% at T2; providing information and encouraging cascade testing were the most common reasons for sharing. Communication with a blood relative, other healthcare providers beyond the primary care provider, and cascade testing were higher for participants with a high risk than low or moderate risk genomic finding. Qualitative interviews elucidated varied reasons why participants felt (un)prepared for the results, including whether or not they had a family history of breast cancer, and illustrated the complexity of decision-making about sharing results. Although most participants communicated results with family members and healthcare providers in accordance with their risk level, questions remain about how to adequately prepare individuals to receive pathogenic results, ensure timely and accessible follow-up care, and facilitate genetic counseling and cascade testing of at-risk relatives in the setting of population risk-based screening.

A Precision Mixture Risk Model to Identify Adverse Drug Events in Subpopulations Using a Case‐Crossover Design

ABSTRACTDespite the success of pharmacovigilance studies in detecting signals of adverse drug events (ADEs) from real‐world data, the risks of ADEs in subpopulations warrant increased scrutiny to prevent them in vulnerable individuals. Recently, the case‐crossover design has been implemented to leverage large‐scale administrative claims data for ADE detection, while controlling both observed confounding effects and short‐term fixed unobserved confounding effects. Additionally, as the case‐crossover design only includes cases, subpopulations can be conveniently derived. In this manuscript, we propose a precision mixture risk model (PMRM) to identify ADE signals from subpopulations under the case‐crossover design. The proposed model is able to identify signals from all ADE‐subpopulation‐drug combinations, while controlling for false discovery rate (FDR) and confounding effects. We applied the PMRM to an administrative claims data. We identified ADE signals in subpopulations defined by demographic variables, comorbidities, and detailed diagnosis codes. Interestingly, certain drugs were associated with a higher risk of ADE only in subpopulations, while these drugs had a neutral association with ADE in the general population. Additionally, the PMRM could control FDR at a desired level and had a higher probability to detect true ADE signals than the widely used McNemar's test. In conclusion, the PMRM is able to identify subpopulation‐specific ADE signals from a tremendous number of ADE‐subpopulation‐drug combinations, while controlling for both FDR and confounding effects.

Condylar Remodeling and Skeletal Changes Following Occlusal Splint and Manual Therapy: A Cone Beam Computed Tomography Study in Temporomandibular Disorders.

Background: Temporomandibular disorders (TMD) may be associated with degenerative disease of temporomandibular joint (TMJ), such as condyle erosion and subchondral cysts. Occlusal splint and cranio-mandibular manual therapy, or combined therapy, is recommended as a conservative treatment to alleviate pain-related signs and symptoms in TMD. This study aimed to assess osseous condylar changes and skeletal changes following occlusal splint and cranio-mandibular manual therapy in TMD using cone beam computed tomography (CBCT). Methods: A retrospective cohort study included 24 patients diagnosed with TMD. Combined therapy was performed until pain-related signs and symptoms disappeared. CBCT scans were performed before and after therapy. Osseous structure of condyles and their subsequent modifications were analyzed on CBCT images: flattening, erosion, and subchondral cyst. Sella-Nasion-A point (SNA), Sella-Nasion-B point (SNB), A point-Nasion-B point (ANB), Sella-Articulare-Gonion (Condylar angle), and anterior and posterior facial height (AFH, PFH) were measured on CBCT-generated lateral cephalograms. A paired t-test, Wilcoxon rank-sum test, McNemar test, and Stuart-Maxwell test were used for the statistical analyses. Results: The treatment period with combined therapy was 7.42 ± 3.27 months, and 21 out of 33 TMJ presenting degenerative disease (63.6%) had significant complete remodeling (p < 0.05). Following therapy, SNB significantly decreased from 75.61 ±3.47° to 74.82 ± 3.41° (p = 0.02), ANB significantly increased from 4.05° (3.35-4.9°) to 4.8° (3.3-6.12°) (p < 0.001), AFH significantly increased from 112.85 mm (109.28-118.72) to 115.3 mm (112.58-118.88) (p < 0.001), PFH/AFH significantly decreased from 64.17 (61.39-66.1) to 63 (59.68-64.51) (p = 0.012), and condylar angle significantly increased from 140.84 ± 8.18° to 144.42 ± 8.87° (p = 0.007). Conclusion: Combined therapy promoted significant condylar remodeling in TMJ degenerative disease, along with skeletal changes (mandibular retrusion and increase in facial height). Therapeutic strategies should consider condylar remodeling in TMD. Skeletal and dental parameters should be evaluated prior to occlusal splint therapy.

Matched pair analysis of the effect of longer hypothermic machine perfusion time on kidney transplant outcomes.

Hypothermic machine perfusion (HMP) has demonstrated benefits in terms of early kidney transplant function compared to static cold storage. While longer preservation times have shown detrimental effects, a previous paired study indicated that longer pump times (the second kidney in a pair) might lead to improved outcomes. To revisit the prior paired study's somewhat unexpected results by reviewing our program's experience. A total of 61 pairs of transplant recipients who received kidneys from the same donor (2012-2021) were analyzed. Patients were divided into two groups depending on whether they were transplanted first (K1) or second (K2). Therefore, the patients in each pair had identical donor characteristics, except for time on the pump. Statistical analyses included Kaplan-Meyer analysis and paired tests, including McNemar's test, student's paired t-test, or Wilcoxon's test, as appropriate. The two groups of recipients had similar demographics (age, body mass index, diabetes, time on dialysis, sensitization and retransplants). Cold ischemic times for K1 and K2 were 8.9 (95%CI: 7.9, 9.8) and 14.7 hours (13.7, 15.8) (P < 0.0001), respectively. Overall, K2 had a higher rate of freedom from biopsy-proven acute rejection at 1 year (P = 0.015). Delayed graft function was less common in K2, 12/61 (20%) than in K1, 20/61 (33%) (P = 0.046). Finally, K2 showed a higher graft survival than K1 (P = 0.023). Our results agree with a previous study that suggested possible advantages to longer pump times. Both studies should encourage further research into HMP's potential anti-inflammatory effect.

Application of small animal ultrasound imaging technology for identification of polycystic ovary syndrome in a mouse model

Background and AimsPolycystic ovary syndrome (PCOS) is a hormonal disorder common among women of reproductive age, characterized by irregular menstrual periods, elevated levels of androgens, and polycystic ovaries, leading to various symptoms and complications such as infertility, metabolic issues, and increased risk of diabetes and heart disease. This study aimed to compare traditional histological methods and ultrasound imaging for consistency in identifying PCOS in a mouse model. The shortest time to construct the PCOS model using letrozole was determined. MethodsFemale C57/BL mice were randomly divided into three groups: Group A received normal saline and a regular diet; Group B received 1 mg/kg/day of letrozole with a regular diet; and Group C received 1 mg/kg/day of letrozole with a high-fat diet. All mice were administered letrozole by intragastric gavage daily for five weeks. The traditional identification method included measuring body weight, examining vaginal smears, monitoring the estrous cycle, measuring serum androgen levels, and performing H&E staining of ovarian tissues. The PCOS model was evaluated using ultrasound imaging to identify and monitor follicles. The significance of the difference between the traditional identification method and the ultrasonic method was calculated using the nonparametric McNemar test, and consistency between the two methods was assessed with the kappa-coefficient test. On this basis, the ultrasound imaging technology was used to monitor the model-making process for 2, 3 and 4 weeks, and to monitor the parameters of the ovary and follicles to judge the shortest time that gavage letrozole caused the appearance of vesicular follicles in the mouse ovary. ResultsThe traditional identification method showed no PCOS phenotype in group A mice, while groups B and C showed multiple ovarian cystic follicles, indicating successful model induction. The ultrasound imaging results were consistent with the traditional method, showing no PCOS in group A and multiple cystic follicles in groups B and C. The McNemar test revealed no significant difference between the traditional and ultrasonic identification methods. The kappa-coefficient test assessed consistency, yielding a value of 0.903, indicating strong agreement between the methods. The ovarian area, diameter, and the number and diameter of cystic follicles were not significantly changed at two weeks in the letrozole group compared with the control group. At three weeks, there were significant increases in the number and in the diameter of vesicular follicles compared with control cells. At four weeks, the number and diameter, the maximum cross-sectional area and diameter of the ovary were significantly increased compared with the control group. ConclusionsThe ultrasound and traditional methods provide consistent results for identifying PCOS in a mouse model. Construction of the PCOS model by letrozole gavage takes at least three weeks.

The effect of education based on the theory of planned behavior to prevent the consumption of fast food in a population of teenagers

BackgroundConsidering the increasing prevalence of fast food consumption among teenagers, providing the necessary training and self-awareness is the best solution for institutionalizing the prevention of fast food consumption by this group. Therefore, this issue should be taken seriously, as should the implementation of educational interventions to prevent the consumption of fast food. The theory of planned behavior (TPB) is one of the various health education styles and methods that works well. However, given that a number of local data points are crucial in establishing the efficacy of the model employed, this study looks into the impact of TPB-based education in preventing fast food intake among teenagers.MethodsA total of 180 male students, ages 15 to 18, participated in this quasi-experimental study in Shiraz, Iran. Cluster sampling was used in the study, and participants were randomly assigned to two groups: the experimental group (n = 90) and the control group (n = 90). A theory-based questionnaire was used to gather data, and both the control and experimental groups had to complete it before and three months after the intervention. The data were examined using paired t, independent t, and chi-square statistical tests after being entered into SPSS-24.ResultsThe results of the independent t-test showed that there was no significant difference between the two study groups before the intervention in terms of knowledge (P = 0.14), attitude (P = 0.57), subjective norms (P = 0.94), perceived behavioral control (P = 0.81), behavioral intention (P = 0.42), or behavior (P = 0.25). However, following the intervention, there was a significant difference between the two groups with regard to the noted variables (P = 0.001). Furthermore, the McNemar test results demonstrated that the experimental group’s consumption of fast food varied significantly before and after the intervention (P = 0.001), but not in the control group (P = 0.07).ConclusionThe study’s findings demonstrated that TPB-based treatments are successful in helping male students change their habits of consuming fewer amounts of fast food. This study demonstrated that the instructional techniques employed improved the fast food consumption behavior of the intervention group as well as the TPB’s structure (attitude, subjective norms, behavioral intention, and perceived behavioral intention).

Machine learning automated treatment planning for online magnetic resonance guided adaptive radiotherapy of prostate cancer

Background and purposeNo best practices currently exist for achieving high quality radiation therapy (RT) treatment plan adaptation during magnetic resonance (MR) guided RT of prostate cancer. This study validates the use of machine learning (ML) automated RT treatment plan adaptation and benchmarks it against current clinical RT plan adaptation methods. Materials and methodsWe trained an atlas-based ML automated treatment planning model using reference MR RT treatment plans (42.7 Gy in 7 fractions) from 46 patients with prostate cancer previously treated at our institution. For a held-out test set of 38 patients, retrospectively generated ML RT plans were compared to clinical human-generated adaptive RT plans for all 266 fractions. Differences in dose-volume metrics and clinical objective pass rates were evaluated using Wilcoxon tests (p < 0.05) and Exact McNemar tests (p < 0.05), respectively. ResultsCompared to clinical RT plans, ML RT plans significantly increased sparing and objective pass rates of the rectum, bladder, and left femur. The mean ± standard deviation of rectum D20 and D50 in ML RT plans were 2.5 ± 2.2 Gy and 1.6 ± 1.3 Gy lower than clinical RT plans, respectively, with 14 % higher pass rates; bladder D40 was 4.6 ± 2.9 Gy lower with a 20 % higher pass rate; and the left femur D5 was 0.8 ± 1.8 Gy lower with a 7 % higher pass rate. ConclusionsML automated RT treatment plan adaptation increases robustness to interfractional anatomical changes compared to current clinical adaptive RT practices by increasing compliance to treatment objectives.

Point-of-Care Lung Ultrasound to Evaluate Lung Isolation During One-Lung Ventilation in Children: A Blinded Observational Feasibility Study.

Minimally invasive thoracic surgical techniques require effective lung isolation using one-lung ventilation (OLV). Verification of lung isolation may be confirmed by auscultation, visual confirmation using fiberoptic bronchoscopy (FOB), or more recently, point-of-care ultrasound (POCUS). The aim of this study was to prospectively compare lung ultrasound with clinical auscultation to confirm OLV before thoracic surgery in pediatric patients. This prospectively blinded feasibility study included 40 patients ranging in age from 0 to 20 years. After confirmation of lung separation by the primary anesthesia team using FOB, the sonographer and the auscultator, both blinded to the laterality of surgery and lung separation, entered the operating room. The sonographer evaluated for pleural lung sliding and the auscultator listened for breath sounds. Successful lung separation was definitively confirmed by direct visualization of lung collapse during the operation. In confirming effective single-lung ventilation, lung ultrasound had a diagnostic accuracy of 95% (95% confidence interval [CI], 82.7%-98.5%). In contrast, auscultation could only reliably confirm lung isolation with 68% accuracy (95% CI, 51.5%-80.4%). The McNemar test showed a statistically significant difference between the use of lung ultrasound and auscultation (P < .001). The median time to perform ultrasonography was 67 seconds (interquartile range [IQR], 46-142) and the median time to perform auscultation was 21 seconds (IQR, 10-32). Based on the initial results of our feasibility trial, lung ultrasound proved to be a fast and reliable method to verify single-lung ventilation in pediatric patients presenting for thoracic surgery with a high degree of diagnostic accuracy.

Factors Associated With Improvement Following In-office Steroid Injections for Vocal Fold Scar.

This study aims to evaluate the clinical outcomes of patients receiving in-office vocal fold steroid injections (VFSI), highlighting relatively new measures around vocal pitch. Patients with a diagnosis of vocal fold scar who received in-office VFSI from 2013 to 2024 were evaluated. Pre- and post-steroid Voice Handicap Index (VHI-10) scores, stroboscopic vibratory parameters, acoustic measures of cepstral peak prominence (CPP), and fundamental frequency coefficient of variation (F0CoV) during sustained phonation were analyzed using Wilcoxon signed-rank tests and McNemar's tests. Twenty-two patients had follow-up data 1-3 months after steroid injection. The median decrease in VHI-10 after one injection was 4 points (p = 0.02). We found no difference in CPP and F0CoV measures at follow-up. Forty-five percent of patients improved in mucosal wave and amplitude of at least one vocal fold. Earlier presentation from vocal injury was associated with improvement in mucosal wave and amplitude of the left vocal fold (p = 0.03). We found no difference in sex, tobacco smoking history, singing status, secondary diagnosis, and baseline VHI-10 score between patients who improved in vibratory parameters and those who did not. This single-center study is one of the largest exploring patient outcomes following in-office VFSI. Though patients reported modest improvement in voice use after VFSI, this may not be as impactful as previously believed. Improvement in videostroboscopy is expected in about half of the patients, with recency from vocal injury a likely predictor of success. These partially negative results provide insight into counseling patients regarding benefits from in-office VFSI. 4 Laryngoscope, 2024.

A - 15 Convergent Validity between Standard Neuropsychological Assessment and Web-Based Voice-Recognition Neuropsychological Assessment (Intraneuron)

Abstract Objective The prevalence of mild cognitive impairment (MCI) remains high, and often cases may go undetected. The gold standard for detection of cognitive decline is neuropsychological assessment. However, access to neuropsychological assessment can be impacted by geographic and financial limitations. Prior research has determined that electronic-based testing is effective in detecting cognitive change. This study aimed to investigate a convergent validity between standard neuropsychological assessment (SNA) and a web-based, voice-recognition neuropsychological assessment tool (Intraneuron). Method 75 participants from a community-based neurology practice completed SNA and Intraneuron. Intraneuron is comprised of an auditory list learning/recall test and verbal fluency tests (F/A/S, animals). Pearson correlations were conducted to examine the convergent validity between SNA and Intraneuron. A McNemar cross tabulation analysis was utilized to compare the proportions of detected “normal” and “abnormal” screening for SNA (based on clinical diagnosis) and Intraneuron (utilizing 1SD and 1.5SD below the mean as cutoffs). Results There were moderate, positive correlations between the SNA and Intraneuron: animals (r = 0.43, p &amp;lt; 0.001), F/A/S (r = 0.67, p &amp;lt; 0.001), delayed word list recall (r = 0.49, p &amp;lt; 0.001). The McNemar test showed that the classification between SNA and Intraneuron were similar at 1SD and 1.5SD. Conclusions The study demonstrated convergent validity SNA and Intraneuron. Results suggest that the Intraneuron is equivalent in the detection of early cognitive decline compared to SNA. This data provides support for the value of a web-based screening tool and the potential to maximize utilization across multiple settings and improve early detection of cognitive decline.

Is SDF better than the SMART (silver modified atraumatic restorative technique) in the management of molar incisor hypomineralisation molars with initial caries?

A prospective, randomized, split-mouth clinical study by thetwo previously trained and calibrated pediatric dentists without blinding operators and patients due to different protocols in both treatment groups. An SDF + potassium iodide (KI) and SDF + KI + glass ionmer cement(GIC) on International Caries Detection and Assessment System (ICDAS) 1/2 molar was received by each patient on either sideof mouth. The local Ethics Committee approved this study. Sample size calculation was not performed due to the lack of published studies on the longevity of SMART sealant on MIH-affected molarsand the absence of research on the apparent difference between the effectiveness of SMART and SDF treatments in preventing further caries and sensitivity. These were children between the ages of 6 years to 13 years, who visited the Pediatric Dentistry Clinic at XX University School of Dentistry for routine exams and treatment between July 2019 to May 2020. They were in good health and had at least two fully erupted permanent first molars with MIH as per the European Academy of Pediatric Dentistry, ICDAS code 1/2. This study recorded 12 months of treatment outcomes on hypomineralised molars of 48 children with a follow-up of three years. Children were excluded with specific syndromes associated with enamel malformation, lack of cooperation, ongoing orthodontic treatment, and teeth with ICDAS 3/4/5/6 lesions, existing restorations, fluorosis, or pulpal symptoms. Mann-Whitney U Test was used to assess differences between independent groups (SDF and SMART) and the Friedman Test between dependent groups at different time points. Kaplan-Meier analysis to evaluate the cumulative survival of SMART sealants and survival of caries-free hypomineralised molars in both groups. Chi-Square test was used to compare the success percentages of the SDF and SMART groups. To assess the changes in success percentages at three different time intervals for the caries preventive effect of SDF and SMART, and to evaluate the retention percentages for the SMART group. McNemar's test with a Bonferroni correction was used for significant differences. Cohen's kappa test indicated that the inter-examiner reliability determining the presence of MIH was 0.87. The intra-examiner reliability for US Public Health Service (USPHS)-Modified criteria was 0.90. The statistical significance level was set at p < 0.05 for all statistical analyses. At 12, 24 and 36 months the caries preventive effect was 100%, 67.9%, and 65.4% for SDF + KI-treated teeth; and 100%, 97.6%, and 94.7% for SMART (SDF + KI + GIC) respectively. During the recall period, there was no substantial difference in hypersensitivity scores between the groups. There was no hypersensitivity in teeth at 18 months and beyond. Compared to the baseline Schiff Cold Air Sensitivity Scale (SCASS) score 26 molar with initial hypersensitivity to hypomineralisation had a massive reduction at evaluation periods. The mean survival probabilities for the caries-preventive effect were considerably lower in SDF + KI-treated teeth (31.01 months) than in SMART-treated teeth (35.61 months) (p < 0.001). Considering the limitation of the study, both SMART (SDF + KI + GIC) sealants and 6-monthly application of SDF + KI, provided similar and substantial levels of desensitisation on the permanent MIHmolars. When used as a sealing material on non-cavitated permanent MIHmolars, the clinical retention rate for SMART was 88.7%, 73.1%, and 66.6% at 1, 2, and 3 years respectively. The caries preventive effect of SMART (SDF + KI + GIC) sealants was superior to SDF + KI application in hypomineralised teeth, however, a long-term monitoring and review is essential due to the gradual decrease in retention of SMART sealants.

Impacts of clinical psychiatric posting experience on specialization intention and associated factors among Nursing Science students

BackgroundGlobally, there is increasingly high prevalence of mental disorders across all age groups and social classes with more being projected by 2030, but without commensurate resources for mental health care delivery especially in developing countries.PurposeThis study examined the impacts of clinical psychiatric posting on career choice in psychiatry among nursing students in Ebonyi state, Nigeria.MethodsA prospective cohort research design was used and data were collected using attitude towards psychiatry (ATP), mental illness clinician attitude scale (MICA-4) and researcher developed questionnaires on career choice in pre and post clinical posting approach. This study was conducted between November, 2023 to May 2024. A sample size of 400 students (with data collected before posting and after posting) were involved in the study. Data were coded, cleaned and analyzed using SPSS version 26. McNemar Test was used to determine effects of clinical posting on career choices in psychiatry. Simple and multiple logistic regressions were used to analyze data on determinants of career choices in psychiatry. The hypotheses (Null and alternative hypotheses) were tested at p-value < 0.05.ResultsPsychiatric and mental health nursing was one of the least preferred specialty, 21(6%) respondents showed interest before clinical posting and 25(7.1%) after the posting. Commonly preferred specialty was pediatric nursing (20.5%), community health nursing (17.1%) and midwifery (17.7%). McNemer test showed no statistically significant differences in choice of psychiatry before and after clinical posting. Key determinants of career choices were interest in psychiatry (AOR = 16.06(95% CI = 1.10, 14.96) P = 0.009), interest in community services (AOR = 4.01(95% CI = 1.32, 12.20)P = 0.014), family influence(AOR = 13.76(95% CI = 1.74, 108.57)p = 0.013) and job satisfaction(AOR = 0.10(95% CI = 0.03, 0.26)P < 0.001).ConclusionThe researcher therefore concluded that clinical psychiatric posting has no significant impacts on career choices in psychiatry among nursing students in Nigeria. Interest of the students, family influence and job satisfaction were significantly associated with career choices among the respondents.