Case-control Study Design Research Articles

Influenza vaccine effectiveness in Ireland during two influenza seasons, 2022/23 and 2023/24

Abstract Background Live Attenuated Influenza Vaccine (LAIV) is recommended in Ireland for all children aged 2-17 years. Quadrivalent influenza vaccine is recommended for all others eligible for vaccination, including those aged ≥18 years with underlying medical conditions and all aged ≥65 years. We aimed to estimate influenza vaccine effectiveness (IVE) against Acute Respiratory Infection (ARI) presentations to primary care due to influenza over two influenza seasons in Ireland, to inform vaccination recommendations and communication campaigns. Methods We undertook a test-negative design case control study within the national sentinel surveillance General Practice network, as part of the European Vaccine Effectiveness Burden and Impact Studies (VEBIS) network. We compared influenza vaccination status among influenza Polymerase Chain Reaction (PCR) positive cases with influenza PCR negative controls, amongst patients consulting with ARI. We verified vaccination status using the national influenza vaccination database. We estimated end of season IVE for 2022/23, and mid-season IVE (up to 7th April 2024) for 2023/24, using multivariable logistic regression and adjusting for age, onset time, medical condition, and sex. Results In 2022/23, there were 288 cases and 765 controls. In 2023/24 there were 515 cases and 1,482 controls. Overall vaccination coverage was 23% in both seasons. Coverage in 2-17 year-olds was 10% in 2022/23 and 12% in 2023/24. In 2022/23, overall IVE was 42% (95%CI 9-54) and 50% (95%CI -30-83) in 2-17 year-olds. Overall IVE in 2023/24 was 37% (95%CI 16-54) and was 67% (95%CI 28-87) in 2-17 year-olds. Conclusions Influenza vaccination reduced medical attendance to primary care with ARI due to influenza, demonstrating benefits of vaccination, particularly among children. Influenza vaccination should continue to be offered and promoted to recommended groups, including children. Key messages • This study suggests that influenza vaccination protected population health and the health service from medical attendance to primary care with acute respiratory infection due to influenza. • Higher influenza vaccine effectiveness was observed in children aged 2-17 years. These findings can inform influenza vaccination programmes with LAIV for children in Ireland and internationally.

Assessment of Risk Factors of The Patients With Lateral Epicondylitis

Background: Lateral epicondylitis, is prevalent in the world of sports; however, this injury still causes confusion among healthcare professionals. Numerous studies have evaluated treatment options, but few have taken into consideration the extent to which tennis players, themselves, understand this ailment. Objectives: To identify the risk factors associated with lateral epicondylitis. Materials and methods: An observational case control study design was carried out among 120 patients attended at outdoor Department of Physical Medicine and Rehabilitation, BSMMU, Dhaka from April 2018 to march 2019. Sixty (60) patients with lateral epicondylitis as case group and another 60 patients without lateral epicondylitis as control group. Data was collected using a structured interviewer- administered questionnaire, enquiring about demographic data and details of risk factors. Result: The mean age was found 39.4:6.3 years in case group and 36.97.4 years in control group. Twenty- seven (45.0%) patients had more than 2 hours of use hand in case group and 12(20.0%) in control group. More than half (53.3%) patients had moderate VAS scale in case group and 9(15.0%) in control group, Nine (15.0%) patients were found past history of recurrent injury in case group and not found in control group. The difference was statistically significant (p<0.05) between two groups. Patients having use hand more than 2 hours 3.273 (95% CI 1.453% to 7.36%) times more likely to developed lateral epicondylitis. Conclusion: Use of hand with repetitive wrist extension more than 2 hours was significantly associated with lateral epicondylitis. J Dhaka Med Coll. 2023; 32(1) : 77-84

Case–control study of fatal bicycle crashes in peri-urban areas of Delhi

ObjectivesThere is a lack of evidence on interventions to improve the safety of cycling use in low- and middle-income countries. We investigated the impact of road design and traffic characteristics...

Changes functional prediction of ear canal flora in chronic bacterial otitis externa

ObjectiveTo investigate ear canal microflora’s structure, composition and function in patients with chronic bacterial otitis externa.MethodsA case-control study design method was used to collect the ear canal secretions from 14 patients with chronic bacterial external otitis (CB group) and 14 healthy controls (H group) treated in the Department of Otolaryngology and Head and Neck Surgery in the First Affiliated Hospital of Hainan Medical University. 16S rRNA high-throughput sequencing technology was used to sequence the ear canal microflora’s V3 ~ V4 region gene amplification products in the participating population. The α diversity of ear canal microflora in 2 groups was analyzed. Based on the weighted Unifrac distance, principal coordinate analysis was performed to compare the β diversity of ear tract microflora between the two groups. The differences in ear microflora at phylum and genus levels were analyzed. PICRUSt2 function prediction and BugBase phenotype prediction were also performed.Resultsα diversity analysis showed that the diversity and richness of auricular microflora in the CB group were significantly lower than those in the H group. β diversity analysis showed that there were some differences between the two groups. At the phylum level, the relative abundance of Bdellovibrionota, Campylobacterota, and WPS-2 in the microbiota of patients in the CB group was significantly lower than that in the H group, and the differences were statistically significant. At the genus level, the relative abundance of Pseudomonas, Acinetobacter, Pelomonas, Sphingomonas, Bradyrhizobium, Brevundimonas, Enhydrobacter, Actinomyces, Paracoccus and Chryseobacterium in the ear canal of Group H is significantly higher than that of Group CB. Functional prediction of PICRUSt2 suggests that amino acid biosynthesis and bacterial microbiota may be related. In BugBase phenotypic prediction, the contribution of aerobic phenotype in group CB was significantly lower than that in group H.ConclusionThe diversity and abundance of the ear canal flora of patients with chronic bacterial otitis externa were significantly lower than those of the healthy population, and their bacterial colony structure was significantly altered. Dysbiosis of the ear canal flora may be an important cause of chronic bacterial otitis externa.

Achieved oxygen saturations and risk for bronchopulmonary dysplasia with pulmonary hypertension in preterm infants

ObjectiveCharacterisation of oxygen saturation (SpO2)-related predictors that correspond with both bronchopulmonary dysplasia-associated pulmonary hypertension (BPD-PH) development and survival status in infants with BPD-PH may improve patient outcomes. This investigation assessed...

Determinants of preterm delivery among mothers who gave birth in hospitals of Wolaita zone, southern Ethiopia, 2023: unmatched case-control study

BackgroundPreterm delivery refers to childbirth that occurs before 37 full weeks’ gestation. Globally, around 13.4 million babies are born preterm annually, a million died due to its complications. Identifying its determinants is mandatory to decrease preterm birth and thereby neonatal deaths. Therefore, this study aimed to identify the determinants of preterm delivery among mothers who gave birth in hospitals in the Wolaita zone, southern Ethiopia.MethodsA hospital-based unmatched case-control study design was conducted from March 29 to May 20, 2023, in the Wolaita zone, southern Ethiopia. Cases were women who gave birth after 28 weeks and before 37 completed weeks, and controls were women who gave birth at and after 37 and before 42 weeks of gestation from the first day of the last normal menstrual period. A consecutive sampling method was used. Data were collected by a structured interviewer-administered questionnaire. Data were coded and entered into Epi data 3.1 and analyzed by using SPSS version 25. Variables that had a P-value < 0.25 in the bivariate logistic regression analysis were entered into a multivariable logistic regression model. Finally, p-value < 0.05 was used to claim statistical significance.ResultFrom a total of 405 eligible participants, 399 respondents (133 cases and 266 controls) participated in this study with a response rate of 98.52%. The result of the multivariable analysis shows that mothers who resided in rural areas [AOR = 2.78:95% CI (1.51–5.12)], not receiving support from their partner [AOR = 2.37:95% CI (1.24–4.51)], less than four antenatal care visits [AOR = 4.52:95%CI (2.38–8.57)], developed pregnancy-induced hypertension [AOR = 5.25:95%CI (2.27–12.14)] and exposed for intimate partner violence [AOR = 2.95:95%CI (1.105–7.85)], had statistically significant association with experiencing preterm delivery.Conclusion and recommendationMost of the determinants for preterm delivery have been proven modifiable. Thus, designing new strategies, providing comprehensive mobile clinic services to address hard-to-reach areas and Health care providers should give due attention to mothers with pregnancy-induced hypertension and exposure to intimate partner violence and increase the awareness of antenatal care follow-up and benefit of support during pregnancy to reduce preterm delivery.

IDO1-mediated catabolism of tryptophan in gastric tumors: Its potential role in the axis of histopathology, differentiation and metastasis

BackgroundIndoleamine 2,3-Dioxygenase 1 (IDO1)-mediated tryptophan degradation, which is the rate-limiting enzyme of tryptophan/kynurenine pathway, may cause immune suppression in the tumor microenvironment, while potentiating proliferative and metastatic activity in the tumor focus, Phase studies of IDO1 inhibitors are ongoing, and our study aims to evaluate the potential contribution of IDO1 gene expression to the tryptophan/kynurenine pathway in tumor and tumor microenvironment foci in gastric cancer (GC) on a clinicopathological axis, MethodIn the case-control study design, the determination of tryptophan and its metabolites in the serum of 51 GC and 49 healthy controls was made using High Pressure Liquid Chromatography-Fluorescence Detector (HPLC-FD). IDO1 expression in a total of 102 tissues with tumor and tumor microenvironment was detected by quantitative PCR (q-PCR). ResultsIn gastric tumors, 3,25-fold decreased expression of IDO1 was detected according to the tumor microenvironment (p=0,05), IDO1 expression was found to be more than 2 times higher in signet ring cell carcinoma (SRCC) and poorly differentiated tumors without distant organ metastasis (p<0,05), In GC, tryptophan level was found to be 1,6 times lower than in control (AUC:0889; cut off≤21,57; p<0001), Low tryptophan level was found in advanced tumor stage compared to early stage and in the presence of perineural invasion compared to its absence (p<0,05) The level of kynurenine was found to be approximately 1,8 times lower in SRCC (p=0,04), ConclusionIncreased tryptophan accumulation in the gastric tumor and its microenvironment, when catabolized via IDO1, exhibits histological type, tumor differentiation, and metastasis-promoting effects more prominently in aggressive subtypes such as SRCC,

Design of a Location-Based Case-Control Study of Built Environment Risk Factors for Pedestrian Fatalities in the U.S.

The location-based case-control design is a useful approach for studies where the exposures of interest are aspects of the environment around the location of a health event such as a pedestrian fatality. In this design locations are the unit of analysis and an enumerated cohort of locations are followed through time for the health events of interest and a case-control study of locations is nested within the cohort. Locations where events occurred (case-locations) are compared to matched locations where these events did not occur (control-locations). We describe the application of this design to the issue of pedestrian fatalities using a cohort of 9,612,698 intersections, 17,737,728 road segments, and 222,318 entrance/exit ramp segments that existed in 2017 across all 384 U.S. Metropolitan Statistical Areas. This cohort of locations was followed up from Jan 1, 2017 to Dec 31, 2018 for pedestrian fatalities using the National Highway Traffic Safety Administration Fatality Analysis Reporting System. In total, 10,587 fatalities were identified as having occurred on cohort locations and 21,174 matched control locations were selected using incidence density sampling. Geographic information systems, spatially linked administrative data sets and virtual neighborhood audits via Google Street View are underway to characterize study locations.

Genomic Determinants of Outcome in Acute Lymphoblastic Leukemia.

Although cure rates for childhood acute lymphoblastic leukemia (ALL) exceed 90%, ALL remains a leading cause of cancer death in children. Half of relapses arise in children initially classified with standard-risk (SR) disease. To identify genomic determinants of relapse in children with SR ALL, we performed genome and transcriptome sequencing of diagnostic and remission samples of children with SR (n = 1,381) or high-risk B-ALL with favorable cytogenetic features (n = 115) enrolled on Children's Oncology Group trials. We used a case-control study design analyzing 439 patients who relapsed and 1,057 who remained in complete remission for at least 5 years. Genomic subtype was associated with relapse, which occurred in approximately 50% of cases of PAX5-altered ALL (odds ratio [OR], 3.31 [95% CI, 2.17 to 5.03]; P = 3.18 × 10-8). Within high-hyperdiploid ALL, gain of chromosome 10 with disomy of chromosome 7 was associated with favorable outcome (OR, 0.27 [95% CI, 0.17 to 0.42]; P = 8.02 × 10-10; St Jude Children's Research Hospital validation cohort: OR, 0.22 [95% CI, 0.05 to 0.80]; P = .009), and disomy of chromosomes 10 and 17 with gain of chromosome 6 was associated with relapse (OR, 7.16 [95% CI, 2.63 to 21.51]; P = 2.19 × 10-5; validation cohort: OR, 21.32 [95% CI, 3.62 to 119.30]; P = .0004). Genomic alterations were associated with relapse in a subtype-dependent manner, including alterations of INO80 in ETV6::RUNX1 ALL, IKZF1, and CREBBP in high-hyperdiploid ALL and FHIT in BCR::ABL1-like ALL. Genomic alterations were also associated with the presence of minimal residual disease, including NRAS and CREBBP in high-hyperdiploid ALL. Genetic subtype, patterns of aneuploidy, and secondary genomic alterations determine risk of relapse in childhood ALL. Comprehensive genomic analysis is required for optimal risk stratification.

Evaluation of macular and optic nerve head changes by optical coherence tomography angiography in glaucomatous eyes

Background Optical coherence tomography angiography (OCTA) is introduced as a safe, noninvasive, and dye-free technology that provides an assessment of both large vessels and microvasculature of the retina and some parts of the choriocapillaris. Measuring vessel densities using OCTA at both the macula and optic nerve head (ONH) in glaucomatous eyes and comparing them with those of normal eyes will give us an idea about the effect of glaucoma on vessel densities and the role of OCTA in controlling and monitoring glaucoma progression, which remains despite the various medical and surgical treatment options, the second most common reason of blindness worldwide. Aims The current study aimed to assess vessel densities in glaucomatous patients at both the macula and ONH and compare them with vessel densities of normal participants and to assess if OCTA can be useful in the diagnosis and monitoring of the disease. Settings and design Case–control study. Patients and methods The study enrolled 60 patients who were divided into two groups. Group 1 included 30 patients with any type of glaucoma and group 2 included 30 normal participants. OCTA was performed on all of them to assess the macular and ONH vessel densities. Results Glaucomatous patients showed decreased vessel density at the macula and the ONH. The vessel densities at the foveal and all quadrants of parafoveal regions of the macula were decreased when compared with vessel densities of normal participants. Vessel densities at all quadrants of the peripapillary region also decreased when compared with those of normal participants with a strong positive correlation between average peripapillary vessel density and average peripapillary retinal nerve fiber layer thickness. Conclusions Both macular vessel density and ONH vessel density are affected in glaucoma and that may play a role in the diagnosis and follow-up of the disease.

Social Support for Thai Adults with Type 2 Diabetes: A Case-Control Study.

Non-communicable diseases, including type 2 diabetes (T2DM), are the number one cause of death in Thailand. With its well-known social networking and strong kinship, evidence of social support may be a potential of low-cost approach for T2DM self- management. Social support is quite important for T2DM prevention and control but such evidence in Thai setting is still limited. Therefore, we aimed to study social support and associated determinants for T2DM patients compared to non-diabetes people. An observational study with a case-control study design was conducted in Chiang Mai, Thailand, in 2019-2020. Using inclusion and exclusion criteria, a total of 300 participants: 150 cases, 150 controls were recruited. Participants were selected based on outcome status of having "T2DM". Cases were defined as newly diagnosed (diagnosis of T2DM within 6 months) adult Thai residents and community controls were non-diabetes participants from the same residential area of cases. Data were analyzed by STATA 17. Descriptive analysis compared the characteristics between case and control group. The relation between social support and T2DM was investigated using multivariable Robust regression analysis. About 96.7% of T2DM patients had good social support. T2DM had a significant association with social support in all models defined by potential confounders. Social support was significantly positively associated with having family mealtimes in model 2 and model 3 and increasing age in model 2. BMI and T2DM family history had significant negative association in model 2 and model 3. Social support of Thai T2DM patients is higher than control group. It can either be originated from a newly acquired peer groups network or from the positive social support by family. Future research should focus on behavioral intervention including family and peers to help them understand their role in life-style modification and management of such a prevalent chronic disease.

Goat seropositivity as an indicator of Rift Valley fever (RVF) infection in human populations: A case-control study of the 2018 Rift Valley fever outbreak in Wajir County, Kenya

Rift Valley fever (RVF) is a viral zoonosis, which is considered as a threat to food security in the Horn of Africa. In Kenya, RVF is the 5th ranked priority zoonotic disease due to its high morbidity and mortality, frequent outbreak events, and associated socioeconomic impacts during outbreak events. In 2018, an RVF outbreak was confirmed in Kenya's Siaya, Wajir, and Marsabit counties. During this outbreak, 30 people were confirmed infected with RVF through laboratory tests; 21 in Wajir, 8 in Marsabit, and 1 in Siaya Counties.Seventy-five (75) households (15 cases and 60 controls) were selected and interviewed using a case-control study design in 2021 (?). A case was a household with a member who was diagnosed with RVF in 2018. In addition, a total of 1029 animals were purposively selected within these households and serologically tested for RVF. The study aimed to estimate the contribution of various risk factors to RVF human occurrence in Kenya with a special focus on Wajir County. Wajir County was chosen due to high number of confirmed human cases reported in the 2018 outbreak. A univariable regression model revealed that owner-reported RVF virus exposure in livestock significantly increased the odds of an RVF human case in the household by 32.7 times (95 % CI 4.0–267.4). The respondent being linked to a goat flock that was IgG-positive increased the odds of an RVF human case by 3.8 times (95 % CI 1.17–12.3). In the final multivariable analysis, the respondent being linked to their own animals affected by RVF increased odds of having an RVF human case in the household by 56.9 times (95 % CI 4.6–700.4), while the respondent being linked to a neighbor household member affected decreased odds of having a RVF human case by 0.1 times (95 % CI 0.08–0.75).In summary, these results have revealed a potential link for the spread of RVF infection from animals to humans in pastoralist households, hence it is critical to carry out targeted, community education, One Health surveillance, prevention, and control measures against the disease. This will be critical to protecting humans against potential spillovers of infections during outbreak events in livestock.

‘Mind your head’, tackle characteristics associated with concussions in rugby league: a case–control study

ObjectivesIdentify tackle characteristics associated with concussions in male professional rugby league. DesignCase–control study. MethodsTackles resulting in 196 clinically diagnosed concussions and 6592 non-concussive tackles were analysed, from the men's rugby league Super League between 2018 and 2022. Eleven tackle characteristics were coded for each tackle, and Firth penalised logistic regression models were employed to identify influential variables through forward stepwise selection. Three multivariate models were produced; all (i.e., ball-carrier and tackler), tackler, and ball-carrier concussions. ResultsOf the 196 concussions, 70 % occurred to the tackler and 30 % to the ball-carrier. Initial impact location on the ball-carrier was identified as a predictor in all models, specifically the shorts, upper- and lower-leg (OR 9.1–12.3, compared to shoulder) for tacklers and head/neck (OR 66.1, compared to shoulder) for ball-carriers. Tackler head placement in front of the ball-carrier (OR 8.5, compared to away from the body) and a ball-carrier leading arm in any position (OR 4.8–22.1, compared to no leading arm) provided the greatest odds of a tackler concussion. For player's body position the greatest risk of concussion for all players was observed when both players were falling/diving (OR 8.8, compared to both players upright). One (OR 4.9, compared to two) and four (OR 3.7, compared to two) defender tackles provide the greatest odds for all concussions. ConclusionsConcussion prevention strategies should aim to reduce head impacts by deterring initial contact with the ball-carrier's head/neck. Tackle technique should prioritise making initial impact with the torso and avoid the head being in front of the ball-carrier and any leading arms.

Determining the Role of EPX Enzyme and The Prevalenyce of Fasciola Hepatica in Patients with Cholelithiasis

Background : Fascioliasis is a parasitic infection typically caused by Fasciola Hepatica , EPX is one of toxic granules that released by eosinophils in response to infection by this parasite. Aim of study: To determining the epidemiological prevalence of Liver fluke (Fasciola Hepatica ) in patients suffering from gallstones and assessment of serum concentrations of eosinophil marker in these patients and control groups by ELISA. technique. Methodology: Case control study design, included 140 participants, 70 of them included as cases (suffered from Cholelithiasis), and 70 of them included as controls. History of the study was from beginning of October 2023 to end of January 2024, all participants were attending to Al-Sader Medical City/Digestive System Unit, Al-Hakeem Hospital and Al-Haidarya Hospital. Two samples (stool and 5 ml serum) were taken from each participant for microscopic detection of F. hepatica and for measure immune parameter EPX by ELISA, respectively. Results: It was found that there is a statistically significant difference between patients with liver fluke (Fasciola Hepatica ), where the percentage of patients with liver fluke (Fasciola Hepatica ) was 10%. Only 90% of participants suffering from gallstones were negative for this parasite. There was statistically significant (p-value= 0.0001), increase in mean concentration of the parameters (EPX,) between the two groups of patients (29.1±14.04 ng/ml,) and the control (16.76±6.16 ng/ml,) respectively. And there was a known increase in the mean concentration of immune parameter in the serum of patients infected with the parasite (EPX: 56.88±6.78 ng/ml,) compared to their concentration in patients not infected with the parasite. Conclusions: Only 10% of 90% of Cholelithiasis patients in the immediate study were diagnosed positive for F. hepatica parasite. There was increased in study parameter (EPX,) significantly in group of cholelithiasis patients other than control group.

Study on Environmental and Health History Risk Factors for Pneumonia Cases in Toddlers at Motui Health Center

Introduction: Pneumonia case data in North Konawe Regency / 1000 Toddlers in 2017 found 121 cases, in 2018 found 175 cases, in 2019 increased found 162 cases for 2020 decreased by 158 cases and in 2021 found increased with a total of 240 cases from 888 toddlers handled by health workers. The purpose of this study was to analyze the Risk Factors of Toddler Health History and Environment on Pneumonia Cases in Toddlers in the Motui Health Center Work Area. Method: The study used a quantitative method with an observational approach using a Case Control Study design. This study was conducted from March 1 to May 1, 2023. The sample size for each group was at least 46 samples. The comparison of case and control samples is 1: 1. The total sample is 92 respondents with a simple random sampling technique, using the SPSS 26 statistical test. Result: The health history of toddlers has a risk of 8.67 times for the occurrence of pneumonia, environmental conditions have a risk of 8.91 times for the occurrence of pneumonia in toddlers in the Motui Health Center Work Area. Conclusion: The need for a North Konawe District Health Service specifically for handling infectious disease programs.

HALP and PNI Score as Predictors of Nutritional Status in the Incidence of Incisional Hernia after Laparotomy in Colorectal Cancer Patients: A Case-Control Study

Background: Colorectal cancer ranks as the third most common cancer in the world. If patients can still be resected, surgical therapy is carried out. An incisional hernia is one of the complications after laparotomy surgery. Nutritional status can influence the incidence of incisional hernias after laparotomy. Colorectal cancer patients must have their nutritional status assessed using a simple scoring. This research aims to evaluate Hemoglobin, Albumin, Lymphocyte, Platelet (HALP) and Prognostic Nutritional Index (PNI) scores as a predictor of incisional hernia after laparotomy surgery in colorectal cancer patients at Dr. Sardjito General Hospital, Yogyakarta. Methods: This study uses a case-control study design which consisted of two groups, a case group of colorectal cancer patients with incisional hernias after laparotomy surgery and a control group of colorectal cancer patients without incisional hernias. The independent variable was nutritional status which was assessed by HALP and PNI score, and the dependent variable was incisional hernia. This research by taking data from laboratory patients at Dr. Sardjito General Hospital, Yogyakarta. For multivariate analysis, a logistic regression test was used with a significance value of p 0.05. Results: There is a relationship between the stage of cancer and the comorbid diabetes mellitus with the incidence of incisional hernias after laparotomy, this can be seen in the results of the chi-square test. Advanced stage has an OR of 13 (P=.001; OR=13; 95% CI 3.551-47.597), while comorbid diabetes mellitus has an OR of 6.571 (P=.002; OR=6.571; 95% CI 2.109-20.479). However, there is no correlation between the HALP and PNI score with the incidence of incisional hernia after laparotomy. The multivariate analysis results in HALP score have a significant correlation between the nutritional status and the incidence of incisional hernia with OR=17.981 (p= 0.037 OR=17; 95% CI 1.198-269.803). Conclusions: The HALP score can be used as a screening predictor in the incidence of incisional hernia after laparotomy for colorectal cancer patients.

EGFR mutations in patients with lung adenocarcinoma and malignant pleural effusion: a propensity score-matched analysis of a single-center database.

Malignant pleural effusion (MPE) is associated with poor prognosis in patients with advanced lung adenocarcinoma (LUAD), and abnormal activation of epidermal growth factor receptor (EGFR) plays a crucial role in the development of LUAD. This study aimed to investigate the correlation between EGFR mutations and the occurrence of MPE in patients with LUAD and evaluate the effect of EGFR mutations on the prognosis of patients with LUAD with MPE. A case-control study design was adopted that included patients pathologically diagnosed with LUAD. Clinical data were collected, and patients were divided into the MPE group and the non-MPE (N-MPE) group based on the presence of MPE. Propensity score matching (PSM) was used to control for confounding factors. The correlation between EGFR mutations and the occurrence of MPE in LUAD was initially examined. Additionally, various factors affecting the overall survival (OS) of patients with LUAD and MPE were evaluated. A total of 849 patients were included in the study. After 1:2 PSM, there were 180 patients in the MPE group and 360 in the N-MPE group. The EGFR mutation rate was significantly higher in the MPE group compared to the N-MPE group [62.7% vs. 50.2%; odds ratio (OR) =1.668; P=0.006]. This difference was primarily attributed to the T790M mutation (8.3% vs. 1.3%; OR =8.015; P<0.001), but no significant differences observed in other mutation sites between the groups. Further evaluation of factors affecting OS in patients with LUAD and MPE revealed that EGFR mutation was an independent protective factor for OS [hazard ratio (HR) 0.662, 95% CI: 0.456-0.962; P=0.03]. For patients with LUAD, MPE, and EGFR mutations, treatment with third-generation EGFR-tyrosine kinase inhibitors (TKIs) alone (HR 0.466, 95% CI: 0.233-0.930; P=0.03) or sequential first- and third-generation EGFR-TKIs (HR 0.385, 95% CI: 0.219-0.676; P=0.001) was associated with better median OS compared to first-generation EGFR-TKIs alone (first-generation EGFR-TKIs: 35 months, 95% CI: 28.4-41.6; third-generation EGFR-TKIs: 50 months, 95% CI: 37.3-62.7; sequential first- and third-generation EGFR-TKIs: 51 months, 95% CI: 45.6-56.4; P<0.001). This study found there to be a positive correlation between EGFR mutations, particularly the T790M mutation, and MPE in patients with LUAD. EGFR mutation was associated with improved OS in patients with LUAD and MPE. For patients with LUAD, MPE, and EGFR mutations, sequential treatment with first- and third-generation EGFR-TKIs or third-generation EGFR-TKIs alone is recommended, as these regimens provide significant benefit to OS.

Memory T-Cells Contribute to Calcium Release from Bones during Lactation in Mice

Objective: Milk production during lactation places a high demand for calcium that is fulfilled both from maternal bone resorption and diet. While it is known that mammary gland-derived PTHrP drives bone resorption during lactation, the impact of postpartum estrogen loss on bone has been unclear. Methods: We used a case-control study design to test the effect of estrogen loss in lactating mice. Results: In the present study, we show for the first time that estrogen loss during lactation activates memory T-cells (TM) to produce TNFα and IL-17A to aid in bone resorption and calcium release. Our studies reveal a new mechanism for the release of calcium from bone postpartum. The findings provide several new insights. First, the immune system plays a critical role in milk production postpartum. Second, evolutionarily, the pathway serves the physiological purpose of increasing bone resorption to release calcium for breastmilk production postpartum but becomes maladaptive postmenopause, leading to osteoporosis. Finally, these results highlight the crosstalk between the brain–bone–breast–endocrine axis and the immune system during lactation.

Risk of antimuscarinic initiation with cholinesterase inhibitor use in Alzheimer's disease

BackgroundThe use of cholinesterase inhibitors (CHEIs) is commonly associated with urinary incontinence in patients with Alzheimer's disease (AD). This study evaluated the risk of antimuscarinic initiation drugs with the use of CHEIs in AD patients. MethodsThe study used a nested case-control study design involving 2013–2015 Medicare data of AD patients 65 years and older without antimuscarinic use in 2013. Cases were defined as those who initiated antimuscarinic treatment in 2014–2015. Controls with no antimuscarinic use were selected through incidence density sampling and matched to cases on age using a variable-ratio method. The CHEI utilization pattern was classified as current (event-30 days), recent (event-31 to event-90 days), and past (event-91 to event-180 days). Conditional logistic regression was used to assess the association between CHEI use and the risk of antimuscarinic initiation. ResultsThis study included 1,909 cases and 9,064 controls. The adjusted model found that overall CHEI (Adjusted Odds Ratio [aOR] = 1.90, 95 % Confidence Interval [CI]: 1.58–2.28) and current CHEI use (aOR = 1.62, 95 % CI: 1.18–2.21) were associated with an increase in the risk of antimuscarinic initiation compared to non-CHEI use. In addition, the current use of donepezil and rivastigmine significantly increased the risk of antimuscarinic initiation by 48 % (95 % CI: 1.03–2.12) and 171 % (95 % CI: 1.46–5.03), respectively. ConclusionThe study found an increased risk of antimuscarinic initiation with the current use of CHEIs, particularly with donepezil and rivastigmine. These findings underscore the need for careful medication management to minimize prescribing cascades and associated consequences in AD.

The effect of Clusterin level as a potential marker in women with polycystic ovary syndrome

An organ with high metabolic activity, adipose tissue secretes a variety of adipocytokines that control the metabolism of fats and carbohydrates and advance insulin resistance (IR). It is currently unclear what pathophysiological mechanism underlies PCOS. In most cases, IR and metabolic abnormalities coexist with PCOS, a chronic endocrine and metabolic illness. Prompt identification and intervention aid in enhancing patients' quality of life while delaying the development of associated issues. Adipokine clusterin (encoded by CLU) is new. Diabetes and obesity-related populations have higher serum clusterin levels. In order to establish a foundation for early PCOS screening, diagnosis, and therapy, the current study examined variations in serum CLU levels in PCOS patients along with their relationships to sex hormones and metabolic markers. A case-control study design consisting of ninety newly diagnosed PCOS patients of ages ranging between (18-42) years have been recruited according to the Rotterdam criteria of PCOS diagnosis. To compare the results, 90 apparently healthy women of age were matched with the patients' group as a control group. Serum clusterin, fasting insulin (FIN), and fertile hormones have been measured in sera using the enzyme-linked immune sorbent assay (ELISA) technique. An independent t-test analysis was performed on the data. Pearson correlation was utilized to evaluate the relationship between the variables. It was found that the PCOS patients had considerably greater serum CLU (41.672± 3.85 vs. 28.5845± 3.01 μg/ml, P &lt; 0.001) than healthy women. A multiple stepwise linear regression analysis showed that HOMA-IR was separately linked with BMI, and HOMA-IR were independently associated with CLU (P &lt; 0.05). Serum CLU exhibited a positive connection (P &lt; 0.05) with BMI, FSG, FINS, and HOMA-IR. Serum CLU in the PCOS group correlated well with TG, CLU, HOMA-IR, FSH, FSG, and FINS. The PCOS women group significantly outperformed the fertile, healthy women group regarding BMI, LH, FSH, FSG, FIN, HOMA-IR, TC, TG, and LDL-C levels. They also had lower levels of HDL-C and QUICKI values. Additionally, serum clustrein levels. 31.68 A cut-off value of CLU as a marker for diagnosing PCOS with a sensitivity of 90.0% and a specificity of 87.5% (AUC: P value = ˂0.0001, 0.887-1.000.