Poor Quality Studies Research Articles

Continental differences in the association between excess body weight and prognosis in triple-negative breast cancer: a meta-analysis.

The association between obesity and triple-negative breast cancer (TNBC) prognosis has been equivocal, with considerable heterogeneity between and within studies. Recent meta-analyses report adverse associations with overall survival (OS) and disease-free survival (DFS) in TNBC. We update this evidence and examine study- and disease-specific sources of heterogeneity. A systematic search of four databases was conducted until February 22, 2023. Random-effects meta-analyses were used to pool hazard ratios (HR) for OS, DFS, and breast cancer-specific mortality (BCSM). Subgroup analyses examined sources of study heterogeneity. In meta-analyses of included studies (n = 33), significant associations were observed between excess body weight and worse OS (n = 24; HR = 1.20; 95%CI 1.20-1.34), DFS (n = 26; HR = 1.15; 1.05-1.27), and BCSM (n = 9; HR = 1.13; 1.00-1.27). In subgroup meta-analyses, significant inter-study survival differences were observed for study location (OS, DFS), time period of diagnoses (DFS), menopausal status (OS), and body mass index cut points examined (OS). Asian and European studies reported significant associations with OS (HR = 1.31; 1.11-1.54 and HR = 1.38; 1.00-1.89, respectively) and DFS (HR = 1.28; 1.07-1.54 and HR = 1.44; 1.13-1.84, respectively); however, no association was observed between obesity and TNBC prognosis in North American studies (OS: HR = 1.03; 0.89-1.19; DFS: HR = 1.05; 0.95-1.15). Location subgroup differences remained robust after excluding poor-quality studies. Post hoc analysis in the subset of studies reporting predominantly (≥ 70%) White sample showed no statistically significant associations for OS (HR = 1.13; 95%CI 0.96, 1.34), DFS (HR = 1.03; 95%CI 0.86, 1.23), or BCSM (HR = 1.08; 95%CI 0.91, 1.27). This study further confirms that obesity is associated with poor prognosis in TNBC and identified subgroups at higher risk. Ethnic differences in the association between excess body weight and TNBC are reported. Further exploration of study and patient characteristics is needed to properly understand the populations most at risk.

The radiation protection behavior of medical workers: A scoping review protocol.

Radiation exposure in medical settings stands as the primary source of artificial radiation, compounded by the yearly rise in healthcare worker numbers. Ensuring radiation protection is crucial for safeguarding their occupational health. Nevertheless, existing studies on radiation protection behavior exhibit considerable heterogeneity due to various factors. This scoping review aims to explore the current status of research on radiation protection behavior and identify research gaps, intending to guide future research directions. The scoping review will follow the Arksey and O'Malley framework and the Joanna Briggs Institute methodology. A systematic search will be conducted across English databases including PubMed, Web of Science, Embase, and Medline, as well as Chinese databases such as CNKI, Wanfang, VIP, and China Biomedical Literature Database. Two independent reviewers will screen the studies based on predefined eligibility criteria and extract the data. Any disagreements will be resolved through discussion by a third reviewer. The review will be reported according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis extension for Scoping Reviews. A stakeholder consultation will provide an opportunity to validate the findings and address any potential gaps in the article. In this scoping review, all types of studies will be considered. The effectiveness of the methodological quality of the included studies will not be reported, which may lead to some studies of poor quality being included. Only studies published in English or Chinese after 2010 will be considered in this review, potentially leading to the omission of relevant papers.

Stem cells and platelet-rich plasma for the treatment of naturally occurring equine tendon and ligament injuries: a systematic review and meta-analysis.

Platelet-rich plasma (PRP) and mesenchymal stromal or stem cells (MSCs) have been investigated as treatments for equine tendon and ligament injuries, but little consensus exists on the efficacy of these treatments. The study sought to evaluate the efficacy of PRP and MSC treatments by systematic review and meta-analysis. A systematic review was performed using the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analysis) guidelines. Inclusion criteria required an original, peer-reviewed study where horses were administered MSCs or PRP (or both), and a comparator group was described. Studies were assessed for risk of bias and study quality. Random effects meta-analysis with inverse variance weighting was used to calculate pooled estimates of the ORs for the primary outcomes of return to performance and reinjury. The search criteria identified 764 unique studies, and 21 studies met the inclusion criteria for the systematic review. Seventeen studies were further assessed for the primary outcomes of return to performance and reinjury rate within a meta-analysis. Meta-analyses revealed no increase in the likelihood of a return to performance with any of the biologic treatments. However, MSCs and MSCs administered concurrently with PRP provide a reduced risk of reinjury. The current study identified a decrease in reinjury rate in horses administered MSCs or a combination of MSCs and PRP for tendinopathy and desmopathy. However, results should be interpreted with consideration of the heterogeneity of findings, poor study quality, and high risk of bias in the majority of studies.

Association of Uterine Tissue Innervation and Peripheral Nerve Density with Adenomyosis Related Pain. A Systematic Review.

Adenomyosis is associated with dysmenorrhea and chronic pelvic pain; however, the triggering mechanisms of painful stimuli and the role of uterine nerve fibers in the manifestation of pain remain poorly understood. The objective of this study was to systematically review the role of uterine nerve fibers' presence and density in the occurrence of pain in patients with adenomyosis. An electronic search was performed using the Embase, PubMed/Medline, and Cochrane databases. We included all studies from inception to November 2023. A total of ten studies that compared uterine biopsies samples of women with and without adenomyosis were included. The biomarker antiprotein gene product 9.5 was decreased or absent in the endometrium of most included women with adenomyosis. None of the included studies observed a difference in neurofilament (NF) staining between the adenomyosis and non-adenomyosis groups. Studies that assessed nerve growth factor (NGF) staining were heterogeneous in design. One study reported no difference in immunohistochemistry staining in any endometrial layer between the adenomyosis and non-adenomyosis groups, while another reported increased staining in the adenomyosis functional endometrial layer, and a third study reported overexpression of NGF, synaptophysin (SYN), and microtubule-associated protein 2 mRNA in focal adenomyosis alone. Preliminary data from poor-quality studies suggest an increase in the uterine density of nerve fibers in patients with adenomyosis. Well-designed studies are essential to assess the cause-and-effect relationship between uterine nerve fibers and pain in patients with adenomyosis.

Chest CT Scan Findings in Children with COVID-19: A Systematic Review.

To gather, summarize, and appraise the available evidence on: 1) the accuracy of chest CT scan in diagnosing COVID-19 among children, and 2) the characteristic chest CT scan findings associated with COVID-19 pneumonia in children. We comprehensively searched databases (MEDLINE, COCHRANE), clinical trial registries, bibliographic lists of selected studies, and unpublished data for relevant studies. Guide questions from the Painless Evidence Based Medicine and the National Institutes of Health Quality Assessment Tools were used to assess study quality. A poor quality study showed 86.0% (95% CI 73.8, 93.0) sensitivity and 75.9% (95% CI 67.1, 83.0) specificity of chest CT scan in diagnosing COVID-19 in children. Thirty-nine observational studies describing chest CT scan in children with COVID-19 showed abnormal findings in 717 of 1028 study subjects. Common chest CT scan findings in this population include: 1) ground glass opacities, patchy shadows, and consolidation, 2) lower lobe involvement, and 3) unilateral lung lesions. Studies which investigate the accuracy of chest CT scan in the diagnosis of COVID-19 in children are limited by heterogeneous populations and small sample sizes. While chest CT scan findings such as patchy shadows, ground glass opacities, and consolidation are common in children with COVID-19, these may be similar to the imaging findings of other respiratory viral illnesses.

Bridging the knowledge gap! Health outcomes in informal e-waste workers.

Although several studies analyzed the impact of e-waste recycling on human health, most publications did not differ between e-waste workers and bystanders, such as residents. This could lead to an underestimation of health effects in workers. In addition, frequently reported surrogate findings do not properly reflect clinical significant health outcomes. The aim of this review was to analyze the direct health effects of informal e-waste recycling in informal e-waste workers. According to PRISMA guidelines, we systematically searched 3 databases (Embase®, PubMed®, Web of Science) for studies from low- and middle-income countries published in German or English between 1980 and 1 November 2021. Of the 2613 hits, 26 studies (cross-sectional, longitudinal and case-control studies) met the specified criteria and were included. We categorized the results into hormonal, respiratory, renal, cardiovascular, musculoskeletal health and general symptoms in informal e-waste workers. Exposure to e-waste was associated with altered lipid metabolism, thyroid hormonal imbalances, impaired fertility, renal dysfunction, increased prevalence of respiratory symptoms, asthma, cardiac arrhythmias, hypertension, musculoskeletal pain, injuries in up to 89% and skin disorders in up to 87.5-100% of e-waste workers. Due to inconsistent findings, weak associations or poor study quality, it has rarely been possible to establish a causal relationship between informal e-waste work and health effects, except for injuries or skin conditions. Besides high-quality studies, a collective national and international political focus on e-waste disposal is needed.

Timing of Decompressive Surgery in Patients With Acute Spinal Cord Injury: Systematic Review Update.

Systematic review and meta-analysis. Surgical decompression is a cornerstone in the management of patients with traumatic spinal cord injury (SCI); however, the influence of the timing of surgery on neurological recovery after acute SCI remains controversial. This systematic review aims to summarize current evidence on the effectiveness, safety, and cost-effectiveness of early (≤24hours) or late (>24hours) surgery in patients with acute traumatic SCI for all levels of the spine. Furthermore, this systematic review aims to evaluate the evidence with respect to the impact of ultra-early surgery (earlier than 24hours from injury) on these outcomes. A systematic search of the literature was performed using the MEDLINE database (PubMed), Cochrane database, and EMBASE. Two reviewers independently screened the citations from the search to determine whether an article satisfied predefined inclusion and exclusion criteria. For all key questions, we focused on primary studies with the least potential for bias and those that controlled for baseline neurological status and specified time from injury to surgery. Risk of bias of each article was assessed using standardized tools based on study design. Finally, the overall strength of evidence for the primary outcomes was assessed using the GRADE approach. Data were synthesized both qualitatively and quantitively using meta-analyses. Twenty-one studies met inclusion and exclusion criteria and formed the evidence base for this review update. Seventeen studies compared outcomes between patients treated with early (≤24hours from injury) compared to late (>24hours) surgical decompression. An additional 4 studies evaluated even earlier time frames: <4, <5, <8 or <12hours. Based on moderate evidence, patients were 2times more likely to recover by ≥ 2 grades on the ASIA Impairment Score (AIS) at 6months (RR: 2.76, 95% CI 1.60 to 4.98) and 12months (RR: 1.95, 95% CI 1.26 to 3.18) if they were decompressed within 24hours compared to after 24 hours. Furthermore, moderate evidence suggested that patients receiving early decompression had an additional 4.50 (95% CI 1.70 to 7.29) point improvement on the ASIA motor score. With respect to administrative outcomes, there was low evidence that early decompression may decrease acute hospital length of stay. In terms of safety, there was moderate evidence that suggested the rate of major complications does not differ between patients undergoing early compared to late surgery. Furthermore, there was no difference in rates of mortality, surgical device-related complications, sepsis/systemic infection or neurological deterioration based on timing of surgery. Firm conclusions were not possible with respect to the impact of ultra-early surgery on neurological, functional or safety outcomes given the poor-quality studies, imprecision and the overlap in the time frames examined. This review provides an evidence base to support the update on clinical practice guidelines related to the timing of surgical decompression in acute SCI. Overall, the strength of evidence was moderate that early surgery (≤24hours from injury) compared to late (>24hours) results in clinically meaningful improvements in neurological recovery. Further studies are required to delineate the role of ultra-early surgery in patients with acute SCI.

Mental health in the COVID-19 pandemic: A longitudinal analysis of the CLoCk cohort study.

Little is known about the long-term mental health consequences of the pandemic in children and young people (CYP), despite extremely high levels of exposure to the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) virus and the disruption to schooling and leisure activities due to the resultant restrictions. There are mixed findings from systematic reviews of how the pandemic affected CYP's mental health, which may be due to heterogeneous methods and poor quality studies. Most, but not all, suggest deterioration in mental health but population level studies may obscure the differing experiences of subgroups. The study questions are: (i) are there subgroups of CYP with distinct mental health profiles over the course of the second year of the Coronavirus Disease 2019 (COVID-19) pandemic (between April 2021 and May 2022); and (ii) do vulnerability factors influence CYP's mental health trajectories. A matched longitudinal cohort study of non-hospitalised test-positive and test-negative 11- to 17-year-old CYP in England were recruited from the UK Health Security Agency having undergone PCR testing for COVID-19. They completed the Strengths and Difficulties Questionnaire (SDQ) at least twice over a 12-month follow-up period. Overall, 8,518 of 17,918 (47.5%) CYP who returned their first SDQ at 3 or 6 months post-testing were included in the analytical sample. Associations between age, sex, ethnicity, socioeconomic status (SES), and an educational health and care plan (EHCP, indicating special educational needs) on SDQ score trajectories were examined separately, after adjusting for PCR test result. Findings from multilevel mixed-effects linear regression model showed that on average mental health symptoms as measured by the total SDQ score increased over time (B = 0.11 (per month), 95% CI = 0.09 to 0.12, p < 0.001) although this increase was small and not clinically significant. However, associations with time varied by age, such that older participants reported greater deterioration in mental health over time (B = 0.12 (per month), 95% CI = 0.10 to 0.14 for 15 to 17y; 0.08 (95% CI = 0.06 to 0.10) for 11 to 14y; pinteraction = 0.002) and by sex, with greater deterioration in girls. Children with an EHCP experienced less deterioration in their mental health compared to those without an EHCP. There was no evidence of differences in rate of change in total SDQ by ethnicity, SES, or physical health. Those with worse prior mental health did not appear to be disproportionately negatively affected over time. There are several limitations of the methodology including relatively low response rates in CLoCk and potential for recall bias. Overall, there was a statistically but not clinically significant decline in mental health during the pandemic. Sex, age, and EHCP status were important vulnerability factors that were associated with the rate of mental health decline, whereas ethnicity, SES, and prior poor physical health were not. The research highlights individual factors that could identify groups of CYP vulnerable to worsening mental health.

The association between gestational age at delivery and neonatal abstinence syndrome: A systematic review and meta-analysis

Objectives: Some evidence suggests that infants born at later gestational age (GA) are at higher risk of developing neonatal abstinence syndrome (NAS). This systematic review estimated the association between GA at delivery and development of NAS in infants born to women on opioid agonist therapy (OAT).&#x0D; Methods: MEDLINE/PubMed, Scopus, Embase, CINAHL, and the Cochrane Central Register of Controlled Trials were searched from January 2000 to April 2023. Studies reporting data on the association between GA and NAS among pregnant women being treated with OAT were eligible for inclusion. Random effects meta-analysis was used to estimate the mean difference in GA between infants affected by NAS and unaffected infants; odds ratio (OR) for the association between preterm birth and NAS; and OR for the association between gestational week and NAS.&#x0D; Results: Of 966 records identified, 38 studies were eligible for this review. The pooled mean difference in GA between infants affected by NAS and unaffected infants was 0.62 weeks (95% CI: 0.08–1.16, I2=90.7%). The odds of developing NAS were estimated to increase by 3% per gestational week (OR 1.03, 95% CI: 0.997-1.06, I2=84.2%). The OR for the association between preterm birth and developing NAS was estimated to be 0.87 (95% CI: 0.63-1.21, I2=85.7%).&#x0D; Conclusions: The data included in this review demonstrate that higher GA is unlikely to be associated with an increased risk of NAS, although poor study quality and significant study heterogeneity were observed.

Studies of the hydrodynamic properties of the formation of an oil and gas condensate field

This paper presents the experience of well testing conducted by several geological associations. The studies were conducted to assess the characteristics of productive formations, such as hydroconductivity, productivity, saturation pattern and operating mode. Various methods and equipment were used, including various types of drilling rigs and drills. Some disadvantages of the tests are also described, such as the erroneous choice of perforation intervals or poor-quality gas condensate studies. The data on the tools and techniques used, as well as the results of studies on stationary and unsteady filtration modes are presented. The findings of the study will help to improve understanding of the geological characteristics of the formations and improve production efficiency.

Possibility of using non-invasive modes of respiratory support at the stages of interhospital transportation of newborns

Introduction. Respiratory support remains the most common procedure performed by neonatal transport team specialists. Non-invasive ventilation is a very common method of respiratory support for newborns, reducing the incidence of chronic lung disease. However, the safety and efficacy of this type of support during transportation remain controversial. The aim of the work is to determine the current state of the problem of non-invasive respiratory support in newborns in the initial medical organization, at the stage of pre-transport preparation and during transportation. Materials and methods. Literature sources were searched and selected in PubMed and eLibrary. The following queries were used for the search: nasal continuous positive airway pressure, non invasive ventilation, neonate, newborn, patient transportation, transport, transfer. Types of studies considered: retrospective observational studies, prospective studies (randomized, quasi-randomized, non-randomized), systematic reviews, meta-analyses, clinical protocols. Depth of search − 20 years. The total number of publications included in the review was 61, including 29 studies directly related to the use of noninvasive ventilation in interhospital neonatal transport. Results and discussion. Non-invasive respiratory support is one of the priority and actively used methods of therapy of respiratory disorders of various genesis in neonatology. Nasal CPAP is used both independently and in conjunction with various methods of surfactant administration, reducing the risk of a combined outcome “death or chronic lung disease”. It is recommended both as a method of starting respiratory support and as an intermediate option to increase the probability of successful extubation. There is limited experience with non-invasive respiratory support during interhospital transport of neonates. The available studies suggest that when patients are selected rationally and reasonable criteria are applied to administer nCPAP en route, this method of respiratory support is safe, effective, maintains the benefits of spontaneous breathing, and reduces the duration of intensive care. The small number and poor design quality of studies in this direction do not allow at this stage to form evidence-based recommendations. Conclusion. Medical evacuation of newborns from 1−2 level institutions to level 3 organization with nCPAP is safe and has a number of potential benefits. Existing recommendations are empirical, and there are exceptionally few studies evaluating the validity of such recommendations.

Presence of subchondral fracture in cases diagnosed as transient osteoporosis of the hip: a retrospective independent reader-based study.

Transient osteoporosis of the hip (TOH) is an uncommon, typically self-limited diagnosis of uncertain etiology. We hypothesize that TOH represents an underlying subchondral fracture, and a discrete fracture line can often be detected on high-resolution MRI. A retrospective PACS query identified patients meeting imaging criteria for TOH with intense bone marrow edema (BME) in the femoral head on MRI. Those with poor quality studies, other underlying pathologies, or antecedent trauma were excluded. Three musculoskeletal radiologists independently reviewed each case for presence of a definite subchondral fracture line on small field of view (FOV) MR images of the affected hip. Extent of BME, reciprocal acetabular BME, and joint effusion size were also recorded. Binomial logistic regression was performed to determine statistically significant predictors of subchondral fracture. Fifty patients met inclusion criteria (29 females, 0 pregnant). Mean age was 62±12 years (range 35-84). Average duration of symptoms before MRI was 102±135 days. Ten patients had bone densitometry within 2 years of MRI, six demonstrating osteopenia or osteoporosis. Subchondral fractures were unanimously identified in 44/50 (88%). Interclass correlation coefficient with absolute agreement was 0.73, 95% CI (0.57-0.84), indicating near-excellent agreement. Most cases demonstrated a large joint effusion (23/50, 46%) and acetabular BME (31/50, 62%). Increasing size of joint effusion was a statistically significant predictor of subchondral fracture (p=0.05), with 6.9 higher odds. There was a strong correlation with osteopenia/osteoporosis and fracture (p<0.001). Discrete subchondral fractures were identified unanimously on small FOV imaging in the majority of TOH cases.

Outcomes of electroconvulsive therapy in patients with depressive symptoms with versus without comorbid personality disorders/traits: A systematic review and meta-analysis.

To assess electroconvulsive therapy (ECT) outcomes in patients affected by depressive symptoms with versus without additional comorbid personality disorders/traits. We identified observational studies investigating ECT clinical outcomes in patients affected by depressive symptoms with versus without comorbid personality disorders/traits in Embase/Medline in 11/2022. Our protocol was registered with PROSPERO (CRD42023390833). Study quality was evaluated using the Newcastle-Ottawa-Scale. Our primary outcomes were ECT response and remission rates. Meta-regression analyses included effects of in/outpatient percentages, age, number of ECT sessions, and electrode placement; subgroup analyses included the assessment methods for personality disorders/traits. We performed sensitivity analyses after excluding poor-quality studies. A total of 20 studies (n = 11,390) were included in our analysis. Patients with comorbid personality disorders/traits had lower remission rates (OR = 0.42, 95% CI = 0.31, 0.58, p < 0.001) with substantial heterogeneity (I2 = 93.0%) as well as lower response rates (OR = 0.35, 95% CI = 0.24, 0.51, n = 5129, p < 0.001) with substantial heterogeneity (I2 = 93.0%) compared with patients without comorbid personality disorders/traits. Relapse rates were higher in patients with versus without comorbid personality disorders/traits (OR = 3.23, 95% CI = 1.40, 7.45, k = 4, n = 239, p = 0.006) with moderate heterogeneity (I2 = 75.0%) and post-ECT memory impairment was more frequent in patients with versus without comorbid personality disorders/traits (OR = 1.41, 95% CI = 1.36, 1.46, k = 4, n = 471, p < 0.001) with minimal heterogeneity (I2 = 0.0%). Dropout rates were higher in patients with versus without comorbid personality disorders/traits (OR = 1.58, 95% CI = 1.13, 2.21, k = 3, n = 6145, p = 0.008). Patients with comorbid personality disorders/traits treated with ECT are reported to have lower response and remission rates and higher rates of side effects and relapse rates compared with patients without personality disorders/traits.

Expressed breast milk and maternal expression of breast milk for the prevention and treatment of neonatal hypoglycemia: a systematic review and meta-analysis

BackgroundWorldwide, many guidelines recommend the use of expressed breast milk (EBM) and maternal expression of breast milk for the prevention and treatment of neonatal hypoglycemia. However, the impact of both practices on neonatal hypoglycemia is unclear. This study aims to determine the effectiveness of EBM and maternal expression of breast milk in preventing and treating neonatal hypoglycemia.MethodsWe registered our review in PROSPERO (CRD42022328072). We systematically reviewed five databases and four clinical trial registries to identify randomized controlled trials (RCT), non-randomized studies of intervention (NRSI), and cohort studies that compared infants who received EBM to infants who did not, and similar study designs that compared infants whose mothers expressed breast milk to infants whose mothers did not. Two independent reviewers carried out screening, data extraction, and quality assessment. The quality of included RCT, NRSI, and cohort studies were respectively assessed with the Cochrane Risk of Bias 2, Risk Of Bias In Non-randomised Studies—of Interventions, and the Newcastle–Ottawa Scale tools. Results from studies on EBM were synthesized separately from those on maternal expression of breast milk. Meta-analysis was undertaken using Revman 5.4. and fixed-effect models.ResultsNone of the ten included studies was specifically designed to determine the effect of EBM or maternal expression of breast milk on neonatal hypoglycemia. The effect of EBM on neonatal hypoglycemia was not estimable. There was no difference in the risk of hypoglycaemia among neonates whose mothers expressed breast milk compared to those whose mothers did not [RR (95%CI); one RCT: 0.92 (0.77, 1.10), high-certainty evidence; one cohort: 1.10 (0.74, 1.39), poor quality study].ConclusionsThere is insufficient evidence to determine the effectiveness of EBM for preventing or treating neonatal hypoglycemia. Limited data suggests maternal breast milk expression may not alter the risk of neonatal hypoglycemia. High-quality randomized controlled trials are needed to determine the effectiveness of EBM and maternal expression of breast milk for the prevention and treatment of neonatal hypoglycemia.

Neurobiology of osteoarthritis: a systematic review and activation likelihood estimation meta-analysis

Osteoarthritis (OA) affects 240 million people worldwide. Neuroimaging has been increasingly used to investigate brain changes in OA, however, there is considerable heterogeneity in reported results. The goal of this systematic review and meta-analysis was to synthesise existing literature and identify consistent brain alterations in OA. Six databases were searched from inception up to June, 2022. Full-texts of original human studies were included if they had: (i) neuroimaging data by site of OA (e.g. hand, knee, hip); (ii) data in healthy controls (HC); (iii) > 10 participants. Activation likelihood estimation (ALE) was conducted using GingerALE software on studies that reported peak activation coordinates and sample size. Our search strategy identified 6250 articles. Twenty-eight studies fulfilled the eligibility criteria, of which 18 were included in the meta-analysis. There were no significant differences in brain structure or function between OA and healthy control contrasts. In exploratory analysis, the right insula was associated with OA vs healthy controls, with less activity, connectivity and brain volume in OA. This region was implicated in both knee and hip OA, with an additional cluster in the medial prefrontal cortex observed only in the contrast between healthy controls and the hip OA subgroup, suggesting a possible distinction between the neural correlates of OA subtypes. Despite the limitations associated with heterogeneity and poor study quality, this synthesis identified neurobiological outcomes associated with OA, providing insight for future research. PROSPERO registration number: CRD42021238735.

Prevalence of suicidal behavior in adolescents in India: A systematic review and meta-analysis.

Suicidal behaviour (SB) in adolescents is an emerging public health issue globally. The present study was undertaken to estimate the overall prevalence of SB among the adolescents (10-19 years of age) in India. In this systematic review and meta-analysis (SRMA), an extensive literature search in PubMed, Scopus, EBSCO, Web of Science, ProQuest, Embase, Cochrane, and preprint servers (medRxiv, arXiv, bioRxiv, BioRN, ChiRxiv, ChiRN, and SSRN) and assessment of all published articles until 28th February 2023 as per the PROSPERO registration protocol (CRD42023385550), was undertaken. Studies from India which reported the prevalence of suicidal ideation, suicide attempt, and suicidal plan were included. The quality of the included studies was assessed by risk of bias assessment tool. R version 4.2 was used to conduct all the relevant analyses. Heterogeneity was assessed, and a random effects model for estimating the pooled prevalence of the outcomes was applied. Subgroup analyses were planned based on region, locality (urban/rural) and the study settings (educational institutions/community-based). A meta-regression to analyze the effects of potential moderators on outcomes was done. Sensitivity analyses were planned based on the removal of outliers and poor-quality studies. Publication bias was tested by Doi plot and LFK index. Pooled prevalence of suicide attempts, suicide ideations and suicide plans RESULTS: A total of 20 studies were identified as eligible for the systematic review, and 19 studies were identified as eligible for the meta-analysis. The pooled prevalence of suicidal ideation was estimated to be 11% (95% CI 7-15); heterogeneity between the studies was high (I2 98%, p<0.01). The pooled prevalence of suicidal attempts and suicidal plan was estimated to be 3% each (95% CI 2-5); with heterogeneity being high (I2 96%, p<0.01). Subgroup analysis revealed a significant variation in suicidal ideation and attempts between different regions of India (South>East>North), and higher prevalence among the educational-institute-based settings and urban areas. Overall, the prevalence of suicidal behavior among the adolescents in India is high, and they experience all types of suicidal behavior (ideations, plans and attempts).

Postpartum hemorrhage and postpartum depression: A systematic review and meta-analysis of observational studies.

To assess the postpartum depression (PPD) risk in women with postpartum hemorrhage (PPH) and moderators. We identified observational studies of PPD rates in women with versus without PPH in Embase/Medline/PsychInfo/Cinhail in 09/2022. Study quality was evaluated using the Newcastle-Ottawa-Scale. Our primary outcome was the odds ratio (OR, 95% confidence intervals [95%CI]) of PPD in women with versus without PPH. Meta-regression analyses included the effects of age, body mass index, marital status, education, history of depression/anxiety, preeclampsia, antenatal anemia and C-section; subgroup analyses were based on PPH and PPD assessment methods, samples with versus without history of depression/anxiety, from low-/middle- versus high-income countries. We performed sensitivity analyses after excluding poor-quality studies, cross-sectional studies and sequentially each study. One, five and three studies were rated as good-, fair- and poor-quality respectively. In nine studies (k = 10 cohorts, n = 934,432), women with PPH were at increased PPD risk compared to women without PPH (OR = 1.28, 95% CI = 1.13 to 1.44, p < 0.001), with substantial heterogeneity (I2 = 98.9%). Higher PPH-related PPD ORs were estimated in samples with versus without history of depression/anxiety or antidepressant exposure (OR = 1.37, 95%CI = 1.18 to 1.60, k = 6, n = 55,212, versus 1.06, 95%CI = 1.04 to 1.09, k = 3, n = 879,220, p < 0.001) and in cohorts from low-/middle- versus high-income countries (OR = 1.49, 95%CI = 1.37 to 1.61, k = 4, n = 9197, versus 1.13, 95%CI = 1.04 to 1.23, k = 6, n = 925,235, p < 0.001). After excluding low-quality studies the PPD OR dropped (1.14, 95%CI = 1.02 to 1.29, k = 6, n = 929,671, p = 0.02). Women with PPH had increased PPD risk amplified by history of depression/anxiety, whereas more data from low-/middle-income countries are required.

Circulating tumour DNA (ctDNA) as a predictor of clinical outcome in non-small cell lung cancer undergoing targeted therapies: A systematic review and meta-analysis.

e21124 Background: Liquid biopsy (LB) analysis using circulating-tumour DNA (ctDNA)/cell-free DNA (cfDNA) is an emerging alternative to tissue profiling in non-small cell lung cancer (NSCLC). LB is used to guide treatment decisions, detect resistance mechanisms, and predicts responses, and therefore outcomes. This systematic review and meta-analysis evaluated the impact of LB quantification on clinical outcomes in molecularly altered advanced NSCLC undergoing targeted therapies. Methods: We searched Embase, MEDLINE, PubMed and Cochrane Database, between 01/01/2000 and 01/08/2022. The primary outcome was progression-free survival (PFS) and overall survival (OS). Secondary outcomes included objective response rate (ORR), sensitivity and specificity of the test. Age stratification was performed based on the mean age of the individual study population. The quality of studies was assessed using the Newcastle-Ottawa Scale (NOS). Results: Twenty-seven studies reporting 2424 patients were included. Eleven studies (n = 1359) reported an association of baseline ctDNA levels, while 16 studies (n = 1649) reported an association of dynamic ctDNA changes to treatment, with clinical outcomes of PFS and/or OS. Baseline ctDNA-negative patients had higher PFS (pooled hazard ratio [pHR] = 2.97; (95%CI: 1.92-4.85; I2= 97.4%), and OS (pHR = 3.49; (95%CI: 1.73-6.95; I2= 84.2%), than ctDNA-positive patients. Egger’s test suggested publication bias (p &lt; 0.001). Early reduction/clearance of ctDNA levels after treatment improved PFS (pHR = 3.78; 95%CI: 1.91-7.38; I2= 98.4%) and OS (pHR = 2.20; 95%CI: 1.49-3.28; I2= 90.6%), compared to those with no reduction/persistence of ctDNA levels. The PFS was comparable for patients stratified by age (age ≤60 years [pHR = 2.92; 95%CI: 1.43-5.93; I2= 98.3 %] vs. age &gt; 60 years [pHR = 3.94; 95%CI: 1.54-10.07; I2= 83.6 %]). The sensitivity analysis based on study quality (NOS) demonstrated improved PFS only for good quality studies (pHR = 3.67; 95%CI: 1.79-7.54; I2= 91.6 %), but not for poor or fair quality studies. Conclusions: This large systematic review, despite heterogeneity, found that baseline negative ctDNA levels, and early reduction in ctDNA following treatment are strong prognostic markers for PFS and OS in patients undergoing targeted therapies for advanced NSCLC. Future randomised clinical trials should incorporate serial ctDNA monitoring to further establish the clinical utility in advanced NSCLC management. Systematic review registration: PROSPERO registration No. CRD42022347791 Keywords: non-small cell lung cancer; NSCLC; liquid biopsy; circulating tumour DNA; ctDNA; progression-free survival; targeted therapies.

(004) Are Endogenous Androgens Linked to Female Sexual Function? A Systemic Review and Meta-Analysis

Abstract Introduction The benefits of treatment with testosterone (T) in women with loss of desire suggest that low androgens may distinguish women with sexual dysfunction (SD) from others; however, evidence on this point is lacking. Objective Our aim was to answer the question: is there an association between endogenous levels of androgens and sexual function in women? Methods An extensive search was performed in MEDLINE, Embase and PsycInfo. Four separate meta-analyses were conducted for total T, free T, Free Androgen Index (FAI), and Dehydroepiandrosterone sulphate (DHEAS). Cohort, cross-sectional, and prospective studies were included. The main outcome was the association between endogenous androgens and sexual desire. Global sexual function was considered as a secondary outcome. The effect measure was expressed as standardized mean difference (SMD). Results The meta-analysis on total T included 34 studies involving 3,268 women, mean age 36.5 years. In 11 studies, a significant association was found between sexual desire, measured by validated psychometric instruments, and total T (SMD = 0.59 [0.29;0.88], P &amp;lt; 0.0001), with a moderate effect. The association with global sexual function (n = 12 studies) was also significant (SMD = 0.44 [0.21;0.67], P &amp;lt;0.0001). Overall, total T was associated with a better sexual function (SMD = 0.55 [0.28,0.82)], P &amp;lt; 0.0001), with similar results obtained when poor quality studies were removed. Age showed a negative relationship with the overall outcome. No differences were found when stratifying the studies according to menopausal status, type of menopause, age at menopause, use of hormonal replacement therapy, relationship status, method for T measurement, phase of the menstrual cycle or use of hormonal contraception. The meta-analysis of T derivatives (free T and FAI) also showed a significant, moderate association with sexual desire. In contrast, DHEAS seems not to exert any significant influence on desire, whilst showing a positive association with global sexual function. Conclusions There appears to be a moderate association between total T and sexual desire/global sexual function, which is confirmed, although weak, in studies employing liquid chromatography-mass spectrometry (LC-MS). Similar results on desire were obtained for free T and FAI. DHEAS only showed a positive association with global sexual function. A significant publication bias was found for total T. Our results suggest that endogenous androgens show a moderate association with a better sexual function in women; however, the role of psychological, relational and other hormonal factors should not be overlooked. More research is needed. Disclosure Any of the authors act as a consultant, employee or shareholder of an industry for: LV received scientific research grants, advisory board attendance and speaker honoraria from Therascience, Theramex, Bayer Schering Pharma, Intercept, Lipocine, Ibsa.

Effectiveness of warm-up interventions on work-related musculoskeletal disorders, physical and psychosocial functions among workers: a systematic review

ObjectivesThe aim of this systematic review was to identify from published literature the available evidence regarding the effects of warm-up intervention implemented in the workplace on work -related musculoskeletal disorders...