Publication Bias: The Elephant in the Review

Antiobesity effects of onion (Allium cepa) in subjects with obesity: Systematic review and meta-analysis

Onions are rich in bioactive compounds and have been found to prevent various chronic diseases, including obesity. We performed a systematic review and meta-analysis to investigate the antiobesity effect of onions. Studies were identified in PubMed/MEDLINE, Embase, Web of Science, and CENTRAL focusing on clinical trials evaluating the antiobesity effects of onion in obese subjects. The risk of bias in the studies was evaluated using Cochrane's Risk of Bias tool. The effect of onions was analyzed using data from the selected studies, and the results were indicated by weighted mean difference with 95% CI. The I 2 static test was used to examine heterogeneity between the studies. A total of 38 studies were reviewed, of which five clinical trials meeting the criteria were selected. As investigational products, onion peels were used in four studies and onions were used in one study. Following systematic review, it was determined that the risk of bias was generally low, and body weight, BMI, waist circumference, and triglyceride levels were significantly reduced in the onion groups compared to the placebo. In conclusion, onion intake had an antiobesity effect by reducing body weight and body fat, and this effect was particularly pronounced with onion peel.

SGLT2 Inhibitors: Effect on Myocardial Infarction and Stroke in Type 2 Diabetes

BACKGROUND

Sodium-glucose cotransporter-2 inhibitors (SGLT2i) have recently been recommended as preferred agents for management of hyperglycemia in type 2 diabetes, primarily based on their ability to reduce a composite of major cardiovascular adverse events (3-point major adverse cardiovascular events [MACE]), predominantly by reducing cardiovascular death. However, reduction of the individual components, myocardial infarction (MI), or stroke (fatal and nonfatal) events have not been well explored.

METHODS

In this meta-analysis, we included data available from cardiovascular outcome trials only, which were event-driven, randomized, and placebo-controlled. Pooled efficacy outcomes included Mantel Haenszel (MH) risk ratio using fixed model (with 95% CI) for fatal and nonfatal MI, stroke, and total MI and stroke.

FINDINGS

Data from 4 eligible trials included 42,568 subjects. Total MACE, MI, and stroke were reported in 4176, 2157, and 1288 subjects, respectively. SGLT2is did not significantly reduce either MI or stroke individually or in totality. The MH risk ratio (95% CI) for fatal and nonfatal MI and stroke with different SGLT2is was found to be 0.93 (95% CI, 0.85-1.01) and 1.00 (95% CI, 0.89-1.11), respectively. For total atherosclerotic cardiovascular disease (ASCVD) events, MH risk ratio (95% CI) was 0.95 (95% CI, 0.89-1.02). For all nonfatal ASCVD (combined nonfatal MI and nonfatal stroke), MH risk ratio (95% CI) was 0.94 (95% CI, 0.88-1.02).

INTERPRETATION

SGLT2is reduce MACE without any discernable significant reduction of the incidence of MI or stroke (fatal and nonfatal), probably implicating mechanisms unrelated to anti-atherogenic effects.

The association between selenium and bone health: a meta-analysis

Aims

Previous studies have suggested that selenium as a trace element is involved in bone health, but findings related to the specific effect of selenium on bone health remain inconclusive. Thus, we performed a meta-analysis by including all the relevant studies to elucidate the association between selenium status (dietary intake or serum selenium) and bone health indicators (bone mineral density (BMD), osteoporosis (OP), or fracture).

Methods

PubMed, Embase, and Cochrane Library were systematically searched to retrieve relevant articles published before 15 November 2022. Studies focusing on the correlation between selenium and BMD, OP, or fracture were included. Effect sizes included regression coefficient (β), weighted mean difference (WMD), and odds ratio (OR). According to heterogeneity, the fixed-effect or random-effect model was used to assess the association between selenium and bone health.

Results

From 748 non-duplicate publications, 19 studies were included. We found a significantly positive association between dietary selenium intake (β = 0.04, 95% confidence interval (CI) 0.00 to 0.07, p = 0.029) as well as serum selenium (β = 0.13, 95% CI 0.00 to 0.26, p = 0.046) and BMD. Consistently, those with higher selenium intake had a lower risk of OP (OR = 0.47, 95% CI 0.31 to 0.72, p = 0.001), and patients with OP had a significantly lower level of serum selenium than healthy controls (WMD = -2.01, 95% CI -3.91 to -0.12, p = 0.037). High dietary selenium intake was associated with a lower risk of hip fracture (OR = 0.44, 95% CI 0.37 to 0.52, p < 0.001).

Conclusion

Selenium was positively associated with BMD and inversely associated with OP; dietary selenium intake was negatively associated with hip fracture. The causality and therapeutic effect of selenium on OP needs to be investigated in future studies.

Siblings and risk of allergic rhinitis: A systematic review and meta-analysis

Following the "hygiene hypothesis" and the increase in the prevalence of atopic diseases such as allergic rhinitis, a plethora of studies have investigated the role of sibship composition as a protective factor, but findings are conflicting. The aim of this study was to synthesize the global literature linking birth order and sibship size (number of siblings) to the risk of allergic rhinitis. Fifteen databases were systematically searched, with no restrictions on publication date or language. Observational studies with defined sibship composition (birth order or sibship size) as exposure and allergic rhinitis or allergic rhinoconjunctivitis (self-reported or clinically diagnosed) as outcome were eligible. Study selection, data extraction, and quality assessment were performed independently in pairs. Relevant data were summarized in tables. Comparable numerical data were analyzed using meta-analysis with robust variance estimation (RVE). Seventy-six reports with >2 million subjects were identified. Being second- or later-born child was associated with protection against both current (pooled risk ratio [RR] 0.79, 95% CI 0.73-0.86) and ever (RR 0.77, 95% CI 0.68-0.88) allergic rhinitis. Having siblings, regardless of birth order, was associated with a decreased risk of current allergic rhinitis (RR 0.89, 95% CI 0.83-0.95) and allergic rhinoconjunctivitis (RR 0.92, 95% CI 0.86-0.98). These effects were unchanged across age, time period, and geographical regions. Our findings thus indicate that primarily, a higher birth order, and to a lesser extent the number of siblings, is associated with a lower risk of developing allergic rhinitis.

R., Janana Priya G.. Association of Visual Impairment with Suicidal Ideation and Suicide Attempts: A Systematic Review and Meta-Analysis

Background

Worldwide, there is an increase in the incidence of suicide each year. Suicide attempts are estimated to be more frequent than actual suicide mortality. One potential contributor to suicide risk is the presence of sensory impairments (visual or hearing impairments). The present review aimed to assess the direction and strength of the association between visual impairment (VI) and the risk of suicidal behavior.

Methods

A systematic search was carried out on the literature published up to July 2021 in PubMed, Embase, Cochrane Library, and clinicaltrials.gov. The association between VI and suicidal ideation/attempt was summarized by pooled odds ratio with 95% CI.

Results

Six studies with a sample size of 1,64,752 were included in the final quantitative synthesis. The pooled odds ratios (95% CI) for suicidal ideation and attempt among persons with VI were 1.53 (1.30-1.79) and 4.55 (2.39-8.67), respectively. On subgroup analysis, the odds of suicidal ideation were higher in persons with additional sensory impairment, 2.07 (1.21-3.53), than in the group with VI only, 1.63 (95% 1.34-1.98).

Conclusion

This study found a significant association between suicidal behavior and VI, more so in persons with dual impairment. Structured assessment for psychological health and appropriate management should be an integral part of managing people with visual and other sensory impairments, to prevent this serious adverse consequence.

Yoga as Adjunct Therapy for Chronic Heart Failure: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Background  Chronic heart failure (CHF) is a prevalent cardiovascular condition that can significantly impact the quality of life and increase mortality risk. Yoga is a mind-body therapy that has been studied as a potential complementary treatment for CHF. However, the effectiveness of yoga in improving outcomes in patients with CHF remains uncertain. Methods  We conducted a systematic review of randomized controlled trials (RCTs) evaluating the effects of yoga on outcomes in patients with CHF. We searched the PubMed, Embase, Scopus, Cochrane Library, and IndMED databases from inception to March 2023. The outcomes of interest were left ventricular ejection fraction (LVEF), cardiac biomarkers, exercise capacity, quality of life, and cardiac function. Results  We identified 11 RCTs that met our inclusion criteria, involving a total of 552 participants. The meta-analysis showed that yoga was associated with significant improvements in peak VO 2 (mean difference [MD]= 3.29; 95% Confidence Interval [CI]: 1.64 to 4.94; I 2 = 0%), exercise capacity (MD=101.54; 95% CI: 6.24 to 196.83; I 2 = 96%), quality of life (MD = -19.99; 95% CI: -25.76 to -14.22; I 2  = 43%), NT-proBNP (MD = -288.78; 95% CI: -492.20 to -85.37; I 2  = 94%), and 6-minute walk test (MD = 101.54; 95% CI: 6.24-196.83; I 2  = 96%), but not in the left ventricular ejection fraction (MD = 4.28; 95% CI: -1.14 to 9.70; I 2  = 93%). Subgroup analysis suggested that the effect of yoga on the quality of life is more pronounced in patients with the "New York Heart Association" (NYHA) class I and II CHF patients and in those who practiced yoga for longer durations. No serious adverse events related to yoga were reported. Most of the included studies were of "low" quality. Conclusion  Current evidence suggests that yoga may be an effective complementary and integrative therapy for improving peak VO 2 exercise capacity, NT-proBNP, and quality of life in patients with CHF. However, the low-quality evidence does not render us to conclude anything beyond doubt or draw any firm clinical recommendation. Future high-quality studies are needed to explore the optimal duration and frequency of yoga practice and its effects on long-term outcomes in this population.

Newer glucose-lowering drugs and risk of dementia: A systematic review and meta-analysis of observational studies

BACKGROUND

Preclinical studies have suggested potential beneficial effects of newer glucose-lowering drugs (GLDs) including dipeptidyl peptidase (DPP)-4 inhibitors, glucagon-like peptide-1 receptor agonists (GLP-1RAs), and sodium glucose co-transporter-2 (SGLT2) inhibitors, in protecting humans against cognitive decline and dementia. However, population studies aiming to demonstrate such cognitive benefits from newer GLDs have produced mixed findings. This meta-analysis aimed to evaluate the association between newer GLDs and risk of dementia in adults with type 2 diabetes (T2D).

METHODS

Electronic databases were searched up to March 11, 2022 to include observational studies that examined the association between DPP-4 inhibitors, GLP-1RAs, and SGLT2 inhibitors and risk of dementia (including all-cause dementia, Alzheimer's disease [AD], and vascular dementia [VD]) in people with T2D. We conducted a random-effects meta-analysis to calculate the relative risk (RR) with 95% confidence interval (CI) for each class of newer GLD.

RESULTS

Ten studies (from nine articles) involving 819,511 individuals with T2D were included. Three studies found that SGLT2 inhibitor users had a lower risk of all-cause dementia than non-SGLT2 inhibitor users (RR, 0.62; 95% CI, 0.39-0.97). Five studies found that users versus nonusers of GLP-1RAs were associated with a significant reduction in the risk of all-cause dementia (RR, 0.72; 95% CI, 0.54-0.97). However, a meta-analysis for AD and VD was unavailable for SGLT2 inhibitors and GLP-1RAs because only one study was included for each drug. In seven studies, users vs. nonusers of DPP-4 inhibitors were significantly associated with a decreased risk of all-cause dementia (RR, 0.84; 95% CI, 0.74-0.94) and VD (RR, 0.59; 95% CI, 0.47-0.75) but not AD (RR, 0.82; 95% CI, 0.63-1.08).

CONCLUSION

Newer GLDs were associated with a decreased risk of all-cause dementia in people with T2D. Because of the observational nature and significant heterogeneity between studies, the results should be interpreted with caution. Further research is warranted to confirm our findings.

Birth order, sibship size, and risk of atopic dermatitis, food allergy, and atopy: A systematic review and meta-analysis

BACKGROUND

Atopic dermatitis and food allergy are two frequently concomitant manifestations of the presence of atopy. A substantial number of studies have been published on the association of birth order and sibship size (number of siblings) with atopic dermatitis, food allergy, and atopy. The present work is the first systematic synthesis of the existing literature on this topic.

METHODS

Fifteen databases were searched. Screening, data extraction, and quality assessment were performed by independent pairs. Comparable numerical data were statistically synthesized using random-effects robust variance estimation.

RESULTS

In total, 114 studies were included out of 8819 papers obtained from database searches. Birth order ≥2 versus 1 was associated with lower risk of ever atopic dermatitis (pooled risk ratio [RR] 0.91, 95% CI 0.84-0.98), current food allergy (RR 0.77, 95% CI 0.66-0.90), and positive skin prick test (SPT) to common aeroallergens (RR 0.86, 95% CI 0.77-0.97). Sibship size ≥2 versus 1 was associated with decreased risk of current atopic dermatitis (RR 0.90, 95% CI 0.83-0.98), ever atopic dermatitis (RR 0.92, 95% CI 0.86-0.97), and positive SPT to common aeroallergens (RR 0.88, 95% CI 0.83-0.92). No putative associations were seen regarding atopy assessed through allergen-specific immunoglobulin E with common allergens.

CONCLUSION

The presence of siblings and being second-born or later may decrease the lifetime risk of atopic dermatitis and food allergy, albeit marginally. Similar association was seen with SPT sensitization. However, significant protection was not found for IgE sensitization.

Opioid Agonist Therapies and Pregnancy Outcomes for Pregnant People With Opioid Use Disorder: Protocol for a Systematic Review

BACKGROUND

Opioid use disorder (OUD) during pregnancy presents a significant risk to maternal, fetal, and neonatal health, increasing the likelihood of adverse events, such as maternal overdose, pregnancy loss, stillbirth, preterm birth, low birth weight, and neonatal abstinence syndrome. In order to reduce the risk of these outcomes, the standard of care for OUD during pregnancy in many jurisdictions within the United States and Canada is opioid agonist therapy (OAT). OAT refers to prescription medications that alleviate or eliminate opioid withdrawal symptoms, so that opioid use can be managed more safely. Although OAT has been recognized as a safe option for pregnant people with OUD, many jurisdictions do not have treatment guidelines regarding pharmacological options, dosing recommendations, side effect management, and individual preferences. There is currently a lack of systematic evidence on the impacts of different OAT regimens on pregnancy outcomes.

OBJECTIVE

We aim to evaluate the impacts of specific OAT agents on pregnancy outcomes and inform recommendations for practitioners treating pregnant people with OUD.

METHODS

The MEDLINE, Embase, CINAHL, and PsycINFO databases will be searched for published quantitative studies assessing pregnancy outcomes for individuals on OAT. Given the substantially increased risk of preterm birth, low birth weight, small for gestational age, and stillbirth among pregnant people with OUD, these four end points will comprise our primary outcomes. Database searches will not be restricted by date, and conference abstracts will be restricted to the past 2 years. Titles, abstracts, and full-text articles will be independently screened by 2 reviewers. Data will be extracted independently and in duplicate, using a data extraction form to reduce the risk of reviewer bias. The risk of bias within individual studies will be assessed by using the appropriate CASP (Critical Appraisal Skills Programme) checklists. For studies that consider the same research questions, interventions, or outcomes, meta-analyses will be conducted to synthesize the pooled effect size. In the event that studies cannot be compared directly, results will be synthesized in a narrative account. Between-study heterogeneity will be measured by using the τ² statistic. If more than 10 studies are available for pooling, publication bias will be evaluated by using the Egger regression test.

RESULTS

As of January 2023, a total of 3266 abstracts have been identified for screening. Data extraction is expected to commence in February 2023.

CONCLUSIONS

The topic of OAT and its effect on pregnancy is an understudied area that has the potential to improve health outcomes, clinical practice, education, and community advocacy. The results of our review will be used to inform clinical practice guidelines and improve health outcomes for pregnant people. Findings will be disseminated to diverse groups of stakeholders, including policy makers, clinicians, community partners, and individuals with lived experience of drug use.

TRIAL REGISTRATION

PROSPERO CRD42022332082; https://tinyurl.com/2p94pkx5.

INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID)

DERR1-10.2196/42417.

Psychosocial Attributes of Housing and Their Relationship With Health Among Refugee and Asylum-Seeking Populations in High-Income Countries: Systematic Review

Objectives: Housing as a social determinant of health should provide not only shelter, but also a feeling of home. We explored psychosocial pathways creating a sense of home and influencing the relationship between housing and health among asylum seekers and refugees (ASR) in high-income countries. Methods: We performed a systematic review. To be included, studies had to be peer-reviewed, published between 1995 and 2022, and focus on housing and health of ASR in high-income countries. We conducted a narrative synthesis. Results: 32 studies met the inclusion criteria. The psychosocial attributes influencing health most often identified were control, followed by expressing status, satisfaction, and demand. Most attributes overlap with material/physical attributes and have an impact on ASR's mental health. They are closely interconnected with each other. Conclusion: Psychosocial attributes of housing play an essential role in the health of ASR; they are closely associated with material/physical attributes. Therefore, future research on housing and health of ASR should routinely study psychosocial attributes, but always in association with physical ones. The connections between these attributes are complex and need to be further explored. Systematic Review Registration: https://www.crd.york.ac.uk/prospero/, identifier CRD42021239495.

The relationship between aggressive driving and driver performance: A systematic review with meta-analysis

Traffic crashes remain a leading cause of accidental human death where aggressive driving is a significant contributing factor. To review the driver's performance presented in aggressive driving, this systematic review screens 2412 pieces of relevant literature, selects and synthesizes 31 reports with 34 primary studies that investigated the driver's control performance among the general driver population in four-wheeled passenger vehicles and published with full text in English. These 34 selected studies involved 1731 participants in total. By examining the selected 34 studies, the measures relating to vehicle speed (e.g., mean speed, n = 22), lateral control (e.g., lane deviation, n = 17) and driving errors (e.g., violation of traffic rules, n = 12) were reported most frequently with a significant difference observed between aggressive driving and driving in the control group. The result of the meta-analysis indicates that the aggressive driving behaviour would have 1) a significantly faster speed than the behaviour in the control group with an increase of 5.32 km/h (95% confidence interval, [3.27, 7.37] km/h) based on 8 studies with 639 participants in total; 2) 2.51 times more driving errors (95% confidence interval, [1.32, 3.71] times) than the behaviour in the control group, based on 5 studies with 136 participants in total. This finding can be used to support the identification and quantification of aggressive driving behaviour, which could form the basis of an in-vehicle aggressive driving monitoring system.

Can online learning be a reliable alternative to nursing students' learning during a pandemic? - A systematic review and meta-analysis

OBJECTIVES

To compare online learning with traditional face-to-face and blended learning, based on randomized controlled trials, to determine the impact of online learning on nursing students' learning outcomes.

DESIGN

A systematic review and meta-analysis.

DATA SOURCES

A systematic search was conducted via English (PubMed, ERIC, Embase, CENTRAL, and CINAHL) and Korean databases (RISS, DBpia, and KISS).

REVIEW METHODS

Studies published up to the first week of April 2022 were reviewed with a focus on the participants, intervention, comparison, outcome, and study design format. Following a primary screening of titles and abstracts, and secondary screening of full texts, 10 randomized controlled trial studies were selected, of which eight were included in the meta-analysis. Two researchers independently reviewed the literature, and the final selection was made in consensus.

RESULTS

Online learning had a statistically significant positive effect on nursing students' knowledge, compared with no educational intervention (standardized mean difference (SMD) = 1.63; 95 % confidence interval (CI): 1.31 to 1.95). However, there was no significant difference in the impact of online learning on knowledge compared with blended learning (SMD = -0.14; 95 % CI: -0.70 to 0.41) and face-to-face learning (SMD = 0.37; 95 % CI: -0.32 to 1.06). Furthermore, compared with blended learning (SMD = -0.18; 95 % CI: -0.43 to 0.06) and face-to-face learning (SMD = 0.05; 95 % CI: -0.31 to 0.41), there was no significant difference in the impact of online learning on attitudes toward learning.

CONCLUSIONS

Online learning in nursing education is not significantly different from blended or face-to-face learning in terms of its impact on knowledge acquisition and attitudes toward learning. The results of this review and meta-analysis highlight the need for selective application of learning methods, taking into account learning environments as well as curricular subjects and topics.

Non-suicidal self-injury, suicidal thoughts and behaviors in individuals with an eating disorder relative to healthy and psychiatric controls: A systematic review and meta-analysis

OBJECTIVE

Eating disorders (ED) may be associated with an increased prevalence of non-suicidal self-injury (NSSI) and suicidal thoughts and behaviors (STBs) relative to healthy (HC) and psychiatric (PC) controls. However, precise estimates of differences in prevalence between individuals with EDs and controls are unclear. We compared the prevalence of NSSI, suicidal ideation (SI), suicide attempts (SA), and deaths by suicide in controls and individuals with EDs.

METHOD

We searched MEDLINE, PsycINFO, EMBASE, and CINAHL for peer-reviewed publications reporting the prevalence of NSSI and/or STBs in EDs and HC or PC group (PROSPERO: CRD42021286754). A series of random-effects meta-analyses were conducted to estimate pooled odds ratios (ORs) for NSSI, SI, SA, and death by suicide in EDs.

RESULTS

Across 32 studies, individuals with an ED had a significantly increased prevalence of NSSI (HC: OR = 6.85 [95% CI: 3.60, 13.04]; PC: OR = 2.74 [95% CI: 1.49, 5.06]), SI (HC: OR = 3.63 [95% CI: 2.43, 5.41]; PC: OR = 3.10 [95% CI: 2.01, 4.78]), and SA (HC: OR = 5.16 [95% CI: 4.27, 6.24]; PC: OR = 1.37 [95% CI: 0.37, 4.99]) relative to HC and PC groups. A 2.93-times increased odd of death by suicide did not achieve statistical significance. There was a high-level of heterogeneity between studies.

DISCUSSION

Our findings indicate that ED populations have an increased prevalence of NSSI, SI, and SA but not death by suicide compared to controls and emphasize the need for effective clinical strategies to address these behaviors in ED populations.

PUBLIC SIGNIFICANCE

This review provides evidence for an increased prevalence of non-suicidal self-injury, suicidal ideation, and suicide attempts in populations with eating disorders compared to controls. Our findings emphasize the need for effective clinical strategies to address these behaviors in patients with eating disorders.

A systematic evidence map for the evaluation of noncancer health effects and exposures to polychlorinated biphenyl mixtures

Assessing health outcomes associated with exposure to polychlorinated biphenyls (PCBs) is important given their persistent and ubiquitous nature. PCBs are classified as a Group 1 carcinogen, but the full range of potential noncancer health effects from exposure to PCBs has not been systematically summarized and evaluated. We used systematic review methods to identify and screen the literature using combined manual review and machine learning approaches. A protocol was developed that describes the literature search strategy and Populations, Exposures, Comparators, and Outcomes (PECO) criteria used to facilitate subsequent screening and categorization of literature into a systematic evidence map of PCB exposure and noncancer health endpoints across 15 organs/systems. A comprehensive literature search yielded 62,599 records. After electronic prioritization steps, 17,037 studies were manually screened at the title and abstract level. An additional 900 studies identified by experts or supplemental searches were also included. After full-text screening of 3889 references, 1586 studies met the PECO criteria. Relevant study details such as the endpoints assessed, exposure duration, and species were extracted into literature summary tables. This review compiles and organizes the human and mammalian studies from these tables into an evidence map for noncancer health endpoints and PCB mixture exposure to identify areas of robust research as well as areas of uncertainty that would benefit from future investigation. Summary data are available online as interactive visuals with downloadable metadata. Sufficient research is available to inform PCB hazard assessments for most organs/systems, but the amount of data to inform associations with specific endpoints differs. Furthermore, despite many years of research, sparse data exist for inhalation and dermal exposures, which are highly relevant human exposure routes. This evidence map provides a foundation for future systematic reviews and noncancer hazard assessments of PCB mixtures and for strategic planning of research to inform areas of greater uncertainty.

Effectiveness of Respiratory Muscle Training in Adults With Pulmonary Hypertension. A Systematic Review and Meta-Analysis

BACKGROUND

Patients with pulmonary hypertension (PH) may have impaired exercise capacity and quality of life; this may possibly be due to the early onset of dyspnoea associated with respiratory muscle weakness. Respiratory muscle training could improve the condition of these patients, so this study aimed to determine, through a systematic review and meta-analysis, the effectiveness of respiratory muscle training in adult patients with PH.

METHODS

Medline, Embase, CENTRAL, clinical trial registries databases, and grey literature and reference lists of reviews related to the objective were searched up to March 2022. Controlled clinical trials comparing the effectiveness of respiratory muscle training with sham or no intervention in adults with PH were included. Records were independently screened by two authors. The primary outcomes were maximal and functional exercise capacity, quality of life, and dyspnoea. The secondary outcomes were respiratory muscle strength, physical activity, lung function, and adverse events. Two authors independently extracted data and the study quality was assessed using the Cochrane risk-of-bias tool 2 (RoB 2). The certainty of the evidence was assessed according to the GRADE approach.

RESULTS

A total of 5,524 records were screened, and seven randomised clinical trials (RCTs) (257 participants) were included. It was uncertain whether inspiratory muscle training (IMT), compared with sham IMT or no intervention, increased the distance walked in the 6-minute walk test (6MWT) (MD, 39 m; 95% CI, 20.72-57.39; I²=27%; four RCTs; very low certainty of evidence) and slightly decreased the perceived sensation of dyspnoea (MD, 0.5 points on the mMRC scale; 95% CI, -0.87 to -0.13; I²=0%; two RCTs; very low certainty of evidence). In addition, it was uncertain whether IMT had no effect on the emotional (SMD, -0.34; 95% CI, -1.06 to 0.38; I²=64%; three RCTs; very low certainty of evidence) and physical (SMD, 0.06; 95% CI, -0.41 to 0.52; I²=16%; three RCTs; very low certainty of evidence) component of quality of life.

CONCLUSIONS

It is uncertain whether IMT increases functional exercise capacity and slightly decreases the sensation of dyspnoea. In addition, it is uncertain whether IMT does not affect the quality of life. More RCTs and with a better methodological design are needed to increase the certainty of the evidence and determine the real effect of this intervention.

Association of Metformin with Mortality in COVID-19 Patients: A Systematic Review and Meta-Analysis

Studies have demonstrated high prevalence of mortality in coronavirus disease (COVID-19) patients with type 2 diabetes mellitus; however, the effects of antidiabetic pharmacotherapy on COVID-19 complications need further exploration. The aim of the study was to explore the association of metformin use and mortality in COVID-19 patients. A literature search was conducted using the databases Medline (via PubMed) and Cochrane Central Register of Controlled Trials until February 09, 2021. Nine studies were included in the meta-analysis, including 12,684 COVID-19 patients. The meta-analysis suggested 37% lower risk of mortality in patients receiving metformin (risk ratio: 0.63; 95% confidence interval: 0.50–0.78; p < 0.001). However, no significant difference in hospitalization days between the two groups (p = 0.197) was observed. The analysis revealed significantly lower risk of having obesity (p < 0.001), hypertension (p < 0.001), heart failure (p < 0.001), and cerebrovascular disease (p = 0.015) in the group receiving metformin. The analysis also demonstrated significantly lower risk of using anticoagulants (p = 0.015), diuretics (p < 0.001), and antiplatelets (p = 0.010) in patients receiving metformin. Our findings suggest that metformin use decreases mortality in COVID-19 patients. However, randomized studies demonstrating the consequences of metformin use are needed to understand the magnitude of the beneficial effects of metformin.

Effects of anthocyanin-rich supplementation on cognition of the cognitively healthy middle-aged and older adults: a systematic review and meta-analysis of randomized controlled trials

CONTEXT

The prevalence of age-related cognitive decline has been on the rise as the global population age, putting the independence and quality of life of elderly at risk. Anthocyanin, as a subclass of dietary flavonoids, may have a beneficial impact on cognitive outcomes.

OBJECTIVES

To examine the effects of dietary anthocyanin supplementation on cognition of the cognitively healthy middle-aged and older adults.

DATA SOURCES

PubMed, ScienceDirect, CINAHL, EMBASE, ProQuest and Cochrane databases were searched.

DATA EXTRACTION AND ANALYSIS

Thirteen studies were included in this meta-analysis. Anthocyanin-rich supplementation was found to significantly improve the processing speed of the older adults (95%CI 0.08, 0.44; P = 0.004). No significant differences were observed between intervention and control groups on memory, attention, executive function and psychomotor performance. Current neuroimaging studies have found promising effects of anthocyanin supplementation on brain activation and cerebral perfusion.

CONCLUSION

Anthocyanin-rich supplementation may preserve cognitive processing speed and neuro-activities in older adults, which improves their daily functioning and quality of life. This review provides useful insights to guide direction and methodological designs for future studies to explore the underlying mechanisms of anthocyanins.

SYSTEMATIC REVIEW AND META-ANALYSIS REGISTRATION

PROSPERO registration No. CRD42021228007.

Nutritional counseling for patients with incurable cancer: Systematic review and meta-analysis

BACKGROUND & AIMS

This systematic review aims to determine whether nutritional counseling by registered dietitians and/or nutritional specialists is recommended for adult patients with incurable advanced or recurrent cancer who are refractory to or intolerant of anticancer therapy.

METHODS

This systematic review analyzed randomized controlled trials (RCTs) of nutritional counseling in cancer patients older than 18 years, primarily those with stage 4 cancer. Nutrition counseling was performed by registered dietitians and/or nutritional specialists using any method, including group sessions, telephone consultations, written materials, and web-based approaches. We searched the Medline (PubMed), Medline (OVID), EMBASE (OVID), CENTRAL, Emcare, and Web of Science Core Collection databases for articles published from 1981 to 2020. Two independent authors assessed the risk of bias used the Cochrane Risk of Bias 2 tool. Meta-analysis was performed for results and outcomes that allowed quantitative integration. This systematic review protocol was registered with the International Prospective Register of Systematic Reviews (ID: CRD42021288476) and registered in 2021.

RESULTS

The search yielded 2376 studies, of which 7 assessed 924 patients with cancer aged 24-95 years. Our primary outcome of quality of life (QoL) was reported in 6 studies, 2 of which showed improvement with nutritional counseling. Our other primary outcome of physical symptoms was reported in two studies, one of which showed improvement with nutritional counseling. Quantitative integration of both QoL and physical symptoms was difficult. A meta-analysis of energy and protein intake and body weight was performed for secondary outcomes. Results showed that nutrition counseling increased energy and protein intake, but total certainty of evidence (CE) was low. Bodyweight was not improved by nutrition counseling.

CONCLUSIONS

Nutrition counseling is shown to improve energy and protein intake in patients with incurable cancer. Although neither nutrient intake can be strongly recommended because of low CE, nutrition counseling is a noninvasive treatment strategy that should be introduced early for nutrition intervention for patients with cancer. This review did not find sufficient evidence for the effect of nutrition counseling on QoL, a patient-reported outcome. Overall, low-quality and limited evidence was identified regarding the impact of nutrition counseling for patients with cancer, and further research is needed.

Hazard characterization of bisphenol A (BPA) based on rodent models - Multilevel meta-analysis and dose-response analysis for reproductive toxicity

Bisphenol A (BPA) is a widely used synthetic industrial compound frequently detected in food. Dietary exposure to BPA has been recognised as a potential health concern. However, there are uncertainties regarding BPA toxicity. The primary objective of this study was to summarise and analyse multiple toxicity endpoints of adverse reproductive effects caused by BPA exposure in rodent models. Therefore, a multilevel meta-analysis and subsequent dose-response analysis were conducted. Relevant articles published in English between 2012 and 2021 were collected from online databases, viz. Scopus, EmBase, Web of Science, and PubMed. In total, 41 studies were included for statistical analysis. All statistical analyses were performed using open-source RStudio packages. Summary effects indicated the statistical significance of BPA exposure on decreased sperm concentration (Hedges' g: -1.35) and motility (Hedges' g: -1.12) on average, while no significant effects were observed on the absolute and relative weight of male and female reproductive organs. The lowest mean toxicological reference dose values of 0.0011 mg (kg bw)^-1 day^-1 was proposed for BPA exposure on sperm concentration from the dose-response model. In conclusion, potential health risks from BPA exposure were shown with regards to reproductive toxicity, especially that sperm concentration and sperm motility require further attention.

Long-term Outcomes of Acute Myocardial Infarction in Pre-existing Coronary Artery Ectasia: A Systematic Review and Meta-Analysis

Coronary artery ectasia is associated with an increased risk of acute myocardial infarction. This meta-analysis evaluates outcomes following acute myocardial infarction in patients with pre-existing coronary artery ectasia. A search strategy was designed to utilize PubMed/Medline, EMBASE, and Google scholar for studies including the outcomes of acute myocardial infarction in patients with coronary artery ectasia from inception to February 10, 2022. We reported effect sizes as odds ratio (OR) with a 95% confidence interval (CI). We used I2 statistics to estimate the extent of unexplained statistical heterogeneity. There were 7 studies comprising 13,499 patients in the final analysis. There was no significant difference between patients with coronary ectasia and patients without coronary ectasia in terms of all-cause mortality (OR 0.95; 95% CI 0.58 to 1.56; P = 0.79; I2 = 0%), major adverse cardiovascular events (MACE; OR 4.04; 95% CI 0.34 to 47.57; P = 0.17; I2 = 95%), myocardial re-infarction (OR 2.13; 95% CI 0.83 to 5.47; P = 0.08; I2 = 59%), target vessel revascularization (OR 1.31; 95% CI 0.69 to 2.48; P = 0.21; I2 = 0%), or requiring mechanical supportive devices (OR 1.32; 95% CI 0.22 to 7.83; P = 0.57; I2 = 56%). Acute myocardial infarction in the presence of coronary artery ectasia is not associated with an increased risk of death, MACE, myocardial infarction, or the need for mechanical circulatory support.

The Impact of Corticosteroids on the Outcome of Fungal Disease: a Systematic Review and Meta-analysis

Purpose of Review

Corticosteroids have a complex relationship with fungal disease - risk for many, benefit for others. This systematic review aims to address the effect of corticosteroids on mortality and visual outcome in different fungal diseases.

Recent Findings

Corticosteroids are a risk factor of aspergillosis for patients who have COVID-19, and they also led to a worse outcome. Similarity, corticosteroids are a risk factor for candidemia and mucormycosis. Some researchers reported that using topical corticosteroid in keratitis was associated with worse visual outcome if fungal keratitis. Some studies showed that corticosteroids are linked to a negative outcome for non-HIV patients with Pneumocystis jirovecii pneumonia (PCP), in contrast to those with HIV and PCP.

Summary

In 59 references, we found that corticosteroid therapy showed a worse clinical outcome in invasive aspergillosis (IA) (HR: 2.50, 95%CI: 1.89-3.31, p < 0.001) and chronic pulmonary aspergillosis (CPA) (HR: 2.74, 95%CI: 1.48-5.06, p = 0.001), PCP without HIV infection (OR: 1.29, 95%CI: 1.09-1.53, p = 0.003), invasive candidiasis and candidaemia (OR: 2.13, 95%CI: 1.85-2.46, p < 0.001), mucormycosis (OR: 4.19, 95%CI: 1.74-10.05, p = 0.001) and early in the course of fungal keratitis (OR: 2.99, 95%CI: 1.14-7.84, p = 0.026). There was equivocal outcome in cryptococcal meningoencephalitis in AIDS and primary coccidioidomycosis, while corticosteroid therapy showed a better outcome in PCP in HIV-infected patients (RR: 0.62, 95%CI: 0.46-0.83, p=0.001) and fungal keratitis patients after keratoplasty surgery (OR: 0.01, 95%CI: 0.00-0.41, p = 0.041) and probably in cryptococcal meningoencephalitis in non-immunocompromised patients. A sub-analysis in invasive aspergillosis and CPA showed that use of more than 2 mg/kg/day of prednisolone equivalents per day is a significant factor in increasing mortality (HR: 2.94, 95%CI: 2.13-4.05, p < 0.001). Corticosteroid therapy during invasive fungal disease was usually associated with a slightly or greatly increased mortality or worse visual outcome (in fungal keratitis), with two disease exceptions. Avoiding the addition of corticosteroids, or minimising dose and duration in those who require them, is likely to improve the outcome of most life- and vision-threatening fungal diseases. This review provides a cornerstone for further research in exploring the accuracy of suitable dose and duration of corticosteroids treatment in fungal diseases.

Supplementary Information

The online version contains supplementary material available at 10.1007/s12281-023-00456-2.

Missing trial results: analysis of the current publication rate of studies in pediatric dialysis from 2003 to 2020

BACKGROUND

Decision-making in the field of pediatric dialysis requires evidence from clinical trials, but, similar to other fields of pediatric medicine, might be affected by a low trial publication rate.

METHODS

We analyzed the current publication rate, the time to publication, and factors that might be associated with both rate of and time to publication in pediatric dialysis studies registered as completed on ClinicalTrials.gov from 2003 until November 2020.

RESULTS

Fifty-three respective studies were identified. These enrolled 7287 patients in total. 28 of 53 studies (52.8%) had results available. We identified a median time to publication of 20.5 months (range, 3-67). Studies published after the FDA Amendments Act establishment in 2007 were published faster (P = 0.025). There was no trend toward a higher publication rate of studies completed more recently (P = 0.431). 26 of 53 studies (49.1%) focused on medication and control of secondary complications of kidney failure. 12 of 53 studies (22.6%) enrolled only children, were published faster (P = 0.029) and had a higher 5-year publication rate (P = 0.038) than studies enrolling both children and adults. 25 of 53 studies (47.1%) were co-funded by industry. These were published faster (P = 0.025).

CONCLUSIONS

Currently, only 52.8% of all investigated studies in pediatric dialysis have available results, and the overall median time to publication did not meet FDA requirements. This might introduce a publication bias into the field, and it might negatively impact clinical decision-making in this critical subspecialty of pediatric medicine. A higher resolution version of the Graphical abstract is available as Supplementary information.

Interventions to enhance testing and linkage to treatment for hepatitis C infection for people who inject drugs: A systematic review and meta-analysis

BACKGROUND

With the advent of direct acting antiviral (DAA) therapies for the treatment of hepatitis C virus (HCV), the World Health Organization recommended a goal to eliminate HCV as a public health threat globally by 2030. With the majority of new and existing infections in high income countries occurring among people who inject drugs, achieving this goal will require the design and implementation of interventions which address the unique barriers to HCV care faced by this population.

METHODS

In this systematic review and meta-analysis, we searched bibliographic databases and conference abstracts to July 21, 2020 for studies assessing interventions to improve the following study outcomes: HCV antibody testing, HCV RNA testing, linkage to care, and treatment initiation. We included both randomised and non-randomised studies which included a comparator arm. We excluded studies which enrolled only paediatric populations (<18 years old) and studies where the intervention was conducted in a different healthcare setting than the control or comparator. This analysis was restricted to studies conducted among people who inject drugs. Data were extracted from the identified records and meta-analysis was used to pool the effect of interventions on study outcomes. This study was registered in PROSPERO (CRD42020178035).

FINDINGS

Of 15,342 unique records, 45 studies described the implementation of an intervention to improve HCV testing, linkage to care and treatment initiation among people who inject drugs. These included 27 randomised trials and 18 non-randomised studies with the risk of bias rated as "critical" for most non-randomised studies. Patient education and patient navigation to address patient-level barriers to HCV care were shown to improve antibody testing uptake and linkage to HCV care respectively although patient education did not improve antibody testing when restricted to randomised studies. Provider care coordination to address provider level barriers to HCV care was effective at improving antibody testing uptake. Three different interventions to address systems-level barriers to HCV care were effective across different stages of HCV care: point-of-care antibody testing (linkage to care); dried blood-spot testing (antibody testing uptake); and integrated care (linkage to care and treatment initiation).

INTERPRETATION

Multiple interventions are available that can address the barriers to HCV care for people who inject drugs at the patient-, provider-, and systems-level. The design of models of care to improve HCV testing and treatment among people who inject drugs must consider the unique barriers to care that this population faces. Further research, including high-quality randomised controlled trials, are needed to robustly assess the impact these interventions can have in varied populations and settings.

Association between neonatal phototherapy and future cancer: an updated systematic review and meta-analysis

Phototherapy is the main treatment of neonatal hyperbilirubinemia to prevent encephalopathy. It is generally believed to be safe; however, some studies have shown it might be associated with cancer development. In this systematic review and meta-analysis, we aimed to assess the effect of neonatal phototherapy on future cancer risk. A systematic search in 13 databases was conducted in December 2018 and updated in August 2022 to identify studies that report cancer development after exposure to phototherapy. Throughout the study period, regular manual searches were also conducted to include new studies. A meta-analysis using R programming language was done in which the odds ratios (ORs) with 95% confidence intervals (CIs) were estimated and pooled using the reported adjusted and unadjusted data. Fifteen studies were included. A statistically significant association was detected between neonatal phototherapy and any type of cancer (OR 1.24; 95% CI 1.1, 1.4), any hematopoietic cancer (OR 1.49; 95% CI 1.17, 1.91), any leukemia (OR 1.35; 95% CI 1.08, 1.67), and myeloid leukemia (OR 2.86; 95% CI 1.4, 5.84). The other investigated cancers (lymphoid leukemia, Hodgkin's lymphoma, kidney cancer, nervous system cancer, and skin cancer) were not associated with phototherapy.  Conclusions: Phototherapy may carry a possible risk of future cancers. Future research is needed to quantify the magnitude of the cancer risk. These future studies should consider predictors of preterm birth or exclude premature babies from their analysis. What is Known • There were various reports about the possible association between phototherapy in neonates and the increased risk of cancer in the future. What is New • A statistically significant association between phototherapy and various hematopoietic cancers (especially myeloid leukemia) was recorded. • The effect of the duration of phototherapy on the increased risk of hematopoietic cancers is yet unclear.

A systematic review and meta-analysis of the effect of obesity on patients undergoing lower extremity revascularization

OBJECTIVE

In the present review, we assessed the effect of obesity on clinical outcomes for patients with peripheral arterial disease who had undergone endovascular or open lower extremity revascularization surgery.

METHODS

A systematic search strategy of MEDLINE, EMBASE, CINAHL, Web of Science, and Cochrane Library was conducted. The included studies had compared obese and nonobese cohorts with peripheral arterial disease who had undergone endovascular or open lower extremity revascularization. The outcomes included mortality, major adverse cardiovascular events, major adverse limb events, surgical site infections, endovascular access site complications, and perioperative complications.

RESULTS

Eight studies were included with 171,648 patients. The obese patients (body mass index ≥30 kg/m²) were more likely to be women, to have diabetes, and to have more cardiovascular comorbidities despite being younger. No association was found between obesity and peripheral arterial disease severity. Obesity was associated with an overall 22% decreased mortality risk after lower extremity revascularization (risk ratio [RR], 0.78; 95% confidence interval [CI], 0.71-0.85; P < .001; I² = 0%; GRADE (grading of recommendations assessment, development, evaluation), very low quality). A subgroup analysis by intervention type showed similar findings (endovascular: RR, 0.79; 95% CI, 0.71-0.87; P < .001; I² = 0%; open: RR, 0.70; 95% CI, 0.51-0.95; P = .024; I² = 43%). Obesity was associated with a 14% decreased risk of major adverse cardiovascular events for open surgery only (RR, 0.86; 95% CI, 0.76-0.98; P = .021; I² = 0%; GRADE, very low quality). Obesity was associated with an increased risk of surgical site infections pooled across intervention types (RR, 1.69; 95% CI, 1.34-2.14; P < .001; I² = 78%; GRADE, very low quality). No association was found between obesity and major adverse limb events (RR, 1.02; 95% CI, 0.93-1.11; P = .73; I² = 15%; GRADE, very low quality) or endovascular access site complications (RR, 1.11; 95% CI, 0.76-1.63; P = .58; I² = 86%; GRADE, very low quality). Pooled perioperative complications did not differ between the obese and nonobese cohorts (RR, 1.04; 95% CI, 0.84-1.28; P = .73; I² = 92%; GRADE, very low quality).

CONCLUSIONS

Obesity was associated with reduced mortality risk with both endovascular and open surgery, although a reduction in major adverse cardiovascular events was only observed with open surgery. In addition, obese patients had an increased risk of surgical site infections. Obesity was not associated with major adverse limb events, endovascular access site complications, or perioperative complications. The GRADE quality of evidence was very low. The findings from the present review suggest a survival advantage for obese patients with peripheral arterial disease. Future studies could focus on prospectively investigating the effect of obesity on peripheral arterial disease outcomes. A nuanced evaluation of body mass index as a preoperative risk factor is warranted.

Role of alcohol media literacy in alcohol use among children and adolescents: a systematic review

Enhancing alcohol media literacy (AML) is a critical strategy to attenuate negative effects of alcohol-related media messages. We aimed to systematically review previous studies on AML in children and adolescents. Through database and hand searches, we identified four non-experimental and 13 experimental studies. From the 17 studies, we extracted data on theoretical framework, AML measures, intervention contents and main findings. Our review revealed the following. First, nine and four studies used a single theory and at least two theories, respectively. The most frequently used theory was the Message Interpretation Process model. Second, 13 studies assessed AML using participant self-reporting or evaluators’ ratings of participant performance, but no study reported validities of AML measures. Eight studies assessed tobacco or general media literacy as well as AML. Third, all experimental studies used three to five media literacy core concepts proposed by the Center for Media Literacy in AML interventions. Finally, all non-experimental studies found strong cross-sectional associations between higher AML and improved drinking outcomes; all experimental studies found strong intervention effects, such as an increase in AML or improvement in drinking outcomes. In addition, intervention effects differed across participants’ gender and drinking experiences. Given our review, health professionals should implement strategies to enhance children and adolescents’ AML. Future research should investigate (i) causal inferences in non-experimental studies, (ii) long-term intervention effects in experimental studies and (iii) differences in intervention effects across participants’ characteristics, while using solid theoretical frameworks and multidimensional AML concepts.

Prevalence and Determinants of COVID-19 Vaccine Acceptance in South East Asia: A Systematic Review and Meta-Analysis of 1,166,275 Respondents

Despite its importance in guiding public health decisions, studies on COVID-19 vaccination acceptance and its determinants in South East Asia (SEA) are lacking. Therefore, this study aims to determine the prevalence of COVID-19 vaccine acceptance and the variables influencing the vaccine's acceptance. This review is registered under PROSPERO CRD42022352198. We included studies that reported vaccination acceptance from all SEA countries, utilising five academic databases (Pubmed, MEDLINE, Cochrane Library, Science Direct, and Google Scholar), three Indonesian databases (the Indonesian Scientific Journal Database, Neliti, and Indonesia One Search), two pre-print databases (MedRxiv and BioRxiv), and two Thailand databases (ThaiJo and Thai-Journal Citation Index). The analysis was conducted using STATA 17.0 with metaprop commands. The prevalence for COVID-19 vaccination acceptance in SEA was 71% (95%CI 69-74; I2 99.87%, PI: 68.6-73.5). Myanmar achieved the highest COVID-19 vaccination acceptance prevalence, with 86% (95%CI 84-89), followed by Vietnam with 82% (95% CI 79-85; I2 99.04%) and Malaysia with 78% (95%CI 72-84; I2 99.88%). None of the ten determinants studied (age, sex, education, previous COVID-19 infections, smoking and marriage status, health insurance, living together, chronic diseases, and healthcare workers) were significantly associated with acceptance. This result will be useful in guiding vaccination uptake in SEA.

Risk of serious COVID-19 outcomes among adults and children with moderate-to-severe asthma: a systematic review and meta-analysis

BACKGROUND

The Joint Committee on Vaccination and Immunisation in the United Kingdom requested an evidence synthesis to investigate the relationship between asthma and coronavirus disease 2019 (COVID-19) outcomes.

OBJECTIVE

We conducted a systematic review and meta-analysis to summarise evidence on the risk of severe COVID-19 outcomes in people with uncontrolled asthma or markers of asthma severity.

METHODS

High-dose inhaled corticosteroids (ICS) or oral corticosteroids (OCS) were used as markers of asthma severity, following international or national asthma guidelines. Risk of bias was assessed using Joanna Briggs Institute tools. Adjusted point estimates were extracted for random-effects meta-analyses and subgroup analyses.

RESULTS

After screening, 12 studies (11 in adults and one in children) met the eligibility criteria. Adults using high-dose ICS or OCS had a pooled adjusted hazard ratio (aHR) of 1.33 (95% CI 1.06-1.67, I²=0%) for hospitalisation and an aHR of 1.22 (95% CI 0.90-1.65, I²=70%) for mortality for COVID-19. We found insufficient evidence for associations between markers on COVID-19 mortality in the subgroup analyses.

CONCLUSIONS

Adults with severe asthma are at increased risk of COVID-19 hospitalisation compared to nonusers. Our analysis highlighted the dearth of studies in children with asthma investigating serious COVID-19 outcomes.

The efficacy of patient specific instrumentation (PSI) in total hip arthroplasty (THA): A systematic review and meta-analysis

Background

Patient-specific instrumentation (PSI) has been suggested to reduce improper component positioning, though the effectiveness of PSI in total hip arthroplasty (THA) remains inconclusive. The purpose of this study was to evaluate the radiographic parameters and clinical outcomes comparing PSI and standard instrumentation (SI).

Methods

This systematic review and meta-analysis was conducted in accordance with the 2020 PRISMA statement and was registered on PROSPERO. PubMed, Embase, Scopus, Google Scholar, and ClinicalTrials.gov were searched for relevant studies pertaining to the use of PSI in THA. Inclusion criteria included PSI used in THA, PSI was directly compared to SI, and publication in English. Exclusion criteria included non-primary THA, review articles, abstracts, book chapters, and animal models.

Results

2,458 studies were initially identified, with 13 studies (677 THAs: 338 controls, 339 PSI) meeting all criteria. PSI was favored for the deviation from the preoperative plan for acetabular cup position for anteversion (p = 0.04) and inclination (p = 0.0002); risk of acetabular cup positioning outside the Lewinnek safe zone for anteversion (p = 0.005) and inclination (p < 0.0001); and postoperative Harris Hip Score (p = 0.0002). No significant differences were found for the deviation from the preoperative plan for femoral stem position for anteversion (p = 0.74) or varus/valgus (p = 0.15); intraoperative time (p = 0.55); or intraoperative blood loss (p = 0.62).

Conclusion

The use of PSI in THA is effective in improving acetabular component positioning and postoperative functional outcomes, without increasing intraoperative time or blood loss, compared to SI.

The Benefit of Probiotics in Pediatric Nonalcoholic Fatty Liver Disease: A Meta-analysis of Randomized Control Trials

OBJECTIVES

We conducted a systematic review and meta-analysis to provide a summary of the current literature about the efficacy of probiotics in pediatric nonalcoholic fatty liver disease (NAFLD).

METHODS

A systematic literature search through major electronic databases was carried out for RCTs till September 9, 2021, investigating the efficacy of probiotics in the treatment of pediatric patients with NAFLD. Weighted mean differences (WMD) and Standard Deviations (SD) were used to calculate continuous outcomes and a Risk Ratio with 95% CI was used for dichotomous outcomes.

RESULTS

In total, 4 RCTs with 238 pediatric patients with NAFLD were included in the study. Probiotic supplementation revealed a statistically significant difference in transaminases' levels (ALT: WMD = -7.51 IU/L, 95% CI, -11.28 to -3.73, I 2 = 0%, P < 0.0001; AST: WMD = -6.46 IU/L, 95% CI, -9.31 to -3.61, I 2 = 0%, P < 0.00001), anthropometric characteristics, total cholesterol, triglycerides and ultrasonographic steatosis improvement.

CONCLUSIONS

According to the data of this meta-analysis, probiotic supplementation, and especially supplementation of Lactobacillus acidophilus in combination with other strains of Bifidobacterium or Lactobacillus may be beneficial in the improvement of transaminases', lipid parameters' levels, ultrasonographic, and anthropometric characteristics in children with NAFLD. Current evidence does not allow specifying the exact beneficial strain of probiotics mentioned above. The possible effect of probiotics on liver histology improvement in pediatric NAFLD should be examined in future studies.

Effect of COVID-19 outbreak on the diet, body weight and food security status of students of higher education: a systematic review

The COVID-19 pandemic has impacted college students' lifestyles and placed them at a greater risk of obesity and food insecurity. The purpose of the systematic review was to consolidate evidence for the effect of Covid-19 on students' dietary quality, dietary habits, body weight and food security status. A comprehensive literature search was conducted utilising various databases including Google Scholar, MEDLINE, ScienceDirect, Embase and Scopus to identify relevant studies. To be incorporated in this review, studies had to include higher education students, measure the prevalence of food insecurity and assess the dietary and body weight changes during the COVID-19 pandemic. The studies showed that the diet quality of college students was compromised during the pandemic in many nations due to the decrease in the intake of whole grains, dairy products, legumes, nuts, fruits and vegetables and the increase in consumption of alcohol, confectionery products and refined grains. There was an increase in the frequency of cooking, binge eating, breakfast skipping and unhealthy snacking. These modifications, in return, were associated with body weight changes, with no less than 20 to 30 % of students gaining weight during the pandemic. The pandemic also impacted food security status of students, with over 30% being food insecure worldwide. The COVID-19 outbreak has exacerbated the students' diet quality and dietary habits and placed them under high risk of weight gain and food insecurity. Higher education institutions and governments should improve students' access to nutritious foods and incorporate nutrition education interventions in the curricula.

Effectiveness of school-based child sexual abuse intervention among school children in the new millennium era: Systematic review and meta-analyses

Introduction

School-based child sexual abuse intervention programs were developed to educate the school children to protect them from sexual abuse. The programs were evaluated to make sure the interventions were effective in reducing child sexual abuse cases (CSA). This review aimed to determine the effectiveness of the school-based child sexual abuse intervention programs in the new millennium era (2000-2021) in improving the knowledge, skills, and attitude of school children under 18 years old toward child sexual abuse.

Methods

A systematic search was conducted through MEDLINE (PubMed), EBSCO, and SCOPUS databases to collect full English articles related to school-based CSA intervention programs published from 2000 to 2021.

Results

A total of 29 studies from randomized control trial and quasi-experimental from several countries was analyzed. Comparisons within group of pre-post intervention for knowledge, skills, and attitude were measured by standardized mean difference (SMD) and 95% CI of -1.06 (95% CI: -1.29, -0.84), -0.91 (95% CI: -1.2, -0.61), and -0.51 (95% CI: -3.61, 0.58), respectively. Meanwhile for between intervention and control group comparisons, the SMD of knowledge was 0.9 (95% CI: 0.63, 1.18), skills was 0.39 (95% CI: 0.07, 0.71), and attitude was 1.76 (95% CI: 0.46, 3.07).

Conclusion

The programs were found to be effective in improving the knowledge, skills, and attitude of the students from pre-intervention to post-intervention and between the intervention and control groups.Systematic Review Registration: www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42022312383, identifier: CRD42022312383.

Changing Personal Values through Value-Manipulation Tasks: A Systematic Literature Review Based on Schwartz's Theory of Basic Human Values

According to the Theory of Basic Human Values, values are relatively stable, but not immutable, abstract goals which strongly influence peoples’ lives. Since their relative stability, psychosocial research is attempting to understand the extent to which it is possible to induce a voluntary change in people’s personal values. The main aim of this study was to systematically review the existing literature on experiments to induce a value change, also highlighting the theoretical perspectives used to develop the experimental tasks. We conducted a literature search of five databases (SCOPUS, ProQuest, PsycINFO, PubMed, and Web of Science). After the screening and the eligibility phase, we included a total of 14 articles (25 experiments). Most of these studies involved university students and adopted a pre-and post-test design, using different manipulation tasks. The results highlighted the possibility of inducing a voluntary value change, assessed in terms of mean levels and/or rank order. These findings provide new insights regarding the stability of values in the light of the Theory of Basic Human Values. The practical implications and future research directions are discussed.

Interventions improving well-being of adult cancer patients' caregivers: A systematic review

AIM

The aim of this study was to determine what kind of psychosocial interventions aimed at improving the well-being of adult cancer patient caregivers were developed, and to describe the methodological characteristics and clinical effectiveness of the interventions which could be included in the nursing care plans.

DESIGN

Systematic review DATA SOURCES: A systematic search of three databases (PubMed, CINAHL, and PsycINFO) was conducted to identify peer-reviewed papers published between years 2004-2019.

REVIEW METHODS

The review was guided by the Joanna Briggs Institute manual for systematic reviews. Data were extracted and appraised by three reviewers using standardized checklists. Narrative synthesis was used to analyse the data.

RESULTS

A total of 37 studies underwent analysis. Most of the studies described psychoeducational interventions, designed for patient-caregiver dyads, delivered face-to-face. There was a great variety in caregiver outcomes and measurement tools used. Even though most studies used a randomized controlled design and standardized intervention protocols, many reported problems with recruitment and attrition. Most studies reported that the intervention improved caregiver outcomes, yet the majority of them failed to report effect sizes.

CONCLUSION

There are currently a plethora of successful interventions available for cancer patient caregivers which can be included to the nursing care plan. Psychoeducational online interventions which include a social support component may have the best potential in supporting caregivers. It is important to address specific caregiver needs at different cancer stages rather than general needs of caregivers in future interventions.

IMPACT

This review suggests that despite a large number of different interventions which can be included in the nursing care plan to improve the support offered to caregivers, some issues should be addressed while designing an intervention study. The emphasis should be placed on reporting effect sizes, focusing on specific caregiver needs and improving recruitment, retention strategies and sustainability of caregiver interventions.

Publication rate and research topics of studies in pediatric kidney transplantation

BACKGROUND

The quality of medical care for pediatric kidney transplant recipients depends on sound evidence from published clinical trials.

METHODS

We examined the publication rate, time to publication, and factors associated with publication of studies in pediatric kidney transplantation registered on ClinicalTrials.gov from 1999 to 2020.

RESULTS

We identified 136 studies with an overall enrollment of 36255 study participants, of which only 58.8% have been published yet. Unpublished studies included data from 14 350 participants. The median time to publication was 25 months (range, 0-117) with a significantly shorter time to publication in more recent years. The most frequently investigated research topic was immunosuppressants (49.3%), followed by perioperative management (11.0%) and infectiology (10.3%). The percentage of published studies was highest for the topic steroid withdrawal (87.5%), followed by infectiology (78.6%), and nutrition, sports and quality of life (71.4%). Studies, which were co-funded by industry, showed a significantly higher 5-year publication rate (p = 0.019).

CONCLUSIONS

In conclusion, nearly half of all studies in pediatric kidney transplantation remain unpublished. Non-publication of studies might lead to a publication bias with a negative impact on clinical decision-making.

The Magnitude of NCD Risk Factors in Ethiopia: Meta-Analysis and Systematic Review of Evidence

Background: Non-communicable Diseases (NCDs) and their risk factors are the leading contributors to morbidity and mortality globally, particularly in low- and middle-income countries including Ethiopia. To date, there has been no synthesis of the literature on the relative prevalence of NCD risk factors in Ethiopia. Methodology: We conducted a systematic review and meta-analysis of primary studies reporting on the prevalence of NCD risk factors in Ethiopia published in English from 2012 to July 2020. Pre-tested NCD search terms were applied to Medline, Embase, Scopus, CINAHL, and Global Health. Three reviewers screened and appraised the quality of the identified papers. Data extraction was conducted using a pilot tested proforma. Meta-analysis was conducted using Stata 16 and pooled prevalence estimated with associated 95% confidence intervals. Clinically heterogeneous studies that did not fulfil the eligibility criteria for meta-analysis were narratively synthesised. I² was used to assess statistical heterogeneity. Results: 47 studies fulfilled the inclusion criteria and contributed 68 NCD risk factor prevalence estimates. Hypertension was the most frequently examined NCD risk factor, with a pooled prevalence of 21% (n = 27 studies). The pooled prevalence percentages for overweight and obesity were 19.2% and 10.3%, respectively (n = 7 studies each), with a combined prevalence of 26.8% (n = 1 study). It was not possible to pool the prevalence of alcohol consumption, smoking, metabolic disorders, or fruit consumption because of heterogeneity across studies. The prevalence of alcohol use, as reported from the included individual studies, ranged from 12.4% to 13.5% (n = 7 studies). More than 90% of participants met the WHO-recommended level of physical activity (n = 5 studies). The prevalence of smoking was highly variable, ranging between 0.8% and 38.6%, as was the prevalence of heavy alcohol drinking (12.4% to 21.1%, n = 6 studies) and metabolic syndrome (4.8% to 9.6%, n = 5 studies). Fruit consumption ranged from 1.5% up to the recommended level, but varied across geographic areas (n = 3 studies). Conclusion and recommendations: The prevalence of NCD risk factors in Ethiopia is relatively high. National NCD risk factor surveillance is required to inform the prioritisation of policies and interventions to reduce the NCD burden in Ethiopia.

Stirring a Secret Sauce: A Literature Review on the Conditions and Effects of Authentic Learning

The present conceptual literature review analyzes 50 studies that systematically examined the effects of authentic learning settings on cognitive or motivational learning outcomes. The analysis focuses on describing the context of the studies, the design elements of authentic learning settings, and the pursued intentions of authenticity. The review further describes the effects of authentically designed learning settings on cognitive outcomes, motivational outcomes, and learners’ perceived authenticity revealed by previous research. Building on these findings, we conducted Epistemic Network Analysis (ENA) of contrasting cases to identify design elements and intentions of authenticity characterizing studies that show high effectiveness for cognitive and motivational outcomes versus those with low effectiveness. The ENA results suggest, for instance, that providing authentic materials (as a design element of authentic learning settings) to resemble real-life experiences (as an intention of authenticity) could be a double-edged sword, as they feature both authentically designed learning settings with low effects on cognitive outcomes and settings with high effects on motivational outcomes. Overall, the results of the present literature review point to critical limitations of previous research, such as a lack of clear definitions and operationalizations of authentic learning. Consequently, we draw specific conclusions about how future research could improve our understanding of how to create and implement powerful methods of authentic learning.

Comorbid Depression is Associated with Increased Major Adverse Limb Events in Peripheral Arterial Disease: A systematic review and meta-analysis

OBJECTIVE

Depression is a significant risk factor for mortality in coronary artery disease. On the contrary, the research surrounding depression and peripheral arterial disease is limited. This review aims to systematically evaluate the available literature on the impact of comorbid depression on adverse outcomes in peripheral arterial disease.

DATA SOURCES

A systematic review and meta-analysis were performed using the following databases: MEDLINE, EMBASE, CINAHL, PsycINFO, and Cochrane Library from inception until July 2021.

REVIEW METHODS

Included studies compared depressed and non-depressed patients with peripheral arterial disease. The outcomes included mortality, major adverse cardiovascular events, and major adverse limb events.

RESULTS

A total of 9 297 articles were searched. Of these, seven studies were identified. Depressed patients were more likely to be women, be diabetic, have a history of smoking, and have chronic limb threatening ischemia, despite being younger than non-depressed patients. There was a 20% increase in major adverse limb events in depressed patients [RR 1.20, 95% CI (1.11 - 1.31), z =3.9, p<.001, GRADE strength: very low] but no increased risk of mortality [RR 1.03, 95% CI (0.72-1.40), z =0.06, p =.95. GRADE strength: very low] or major adverse cardiovascular events [RR 1.16, 95% CI (0.67 - 2.01), z =0.54, p =.59, GRADE strength: very low]. A follow-up meta-regression of various comorbidities and demographic variables did not demonstrate a significant contribution to the observed risk ratio for major adverse limb events.

CONCLUSION

Depression was reported in 13% of peripheral arterial disease patients, associated with more medical comorbidity, and a 20% increased risk of major adverse limb events. Although the strength of this evidence is very low, the current state of the literature is still limited. Future studies should prospectively assess the impact of depression and its relationship with medical comorbidities and high risk health behaviors.

The Prevalence of Irritable Bowel Syndrome Among Chinese University Students: A Systematic Review and Meta-Analysis

BACKGROUND

Irritable bowel syndrome (IBS) has become a common public health issue among university students, impairing their physical and mental health. This meta-analysis aimed to examine the pooled prevalence of IBS and its associated factors among Chinese university students.

METHODS

Databases of PubMed, EMBASE, MEDLINE (via EBSCO), CINAHL (via EBSCO), Wan Fang, CNKI and Weipu (via VIP) were systematically searched from inception date to May 31, 2021. Meta-analysis was performed using random-effects models. Meta-regression and subgroup analysis were used to detect the potential source of heterogeneity.

KEY RESULTS

A total of 22 cross-sectional studies (14 were in Chinese and 8 were in English) with 33,166 Chinese university students were included. The pooled prevalence of IBS was estimated as 11.89% (95% CI = 8.06%, 16.35%). The prevalence was 10.50% (95% CI = 6.80%, 15.87%) in Rome II criteria, 12.00% (95% CI = 8.23%, 17.17%) in Rome III criteria, and 3.66% (95% CI = 2.01%, 6.60%) in Rome IV criteria. The highest prevalence of IBS was 17.66% (95% CI = 7.37%, 36.64%) in North China, and the lowest was 3.18% (95% CI = 1.28%, 7.68%) in South China. Subgroup analyses indicated that gender, major, anxiety and depression symptoms, drinking and smoking behaviors were significantly associated with the prevalence of IBS. Meta-regression analyses suggested that region influenced prevalence estimates for IBS.

CONCLUSIONS AND INFERENCES

This meta-analysis illustrated that IBS is very common in Chinese university students. Regular screening, effective prevention, and appropriate treatments should be implemented to reduce the risk of IBS in this population. More future studies should be conducted in Northeastern and Southwestern parts of China.

Systematic Reviews and Meta-Analysis: A Guide for Beginners

Systematic reviews involve the application of scientific methods to reduce bias in review of literature. The key components of a systematic review are a well-defined research question, comprehensive literature search to identify all studies that potentially address the question, systematic assembly of the studies that answer the question, critical appraisal of the methodological quality of the included studies, data extraction and analysis (with and without statistics), and considerations towards applicability of the evidence generated in a systematic review. These key features can be remembered as six 'A'; Ask, Access, Assimilate, Appraise, Analyze and Apply. Meta-analysis is a statistical tool that provides pooled estimates of effect from the data extracted from individual studies in the systematic review. The graphical output of meta-analysis is a forest plot which provides information on individual studies and the pooled effect. Systematic reviews of literature can be undertaken for all types of questions, and all types of study designs. This article highlights the key features of systematic reviews, and is designed to help readers understand and interpret them. It can also help to serve as a beginner's guide for both users and producers of systematic reviews and to appreciate some of the methodological issues.

Reappraisal and empathic perspective-taking - More alike than meets the eyes

Emotion regulation and empathy represent highly intertwined psychological processes sharing common conceptual ground. Despite the wealth of research in these fields, the joint and distinct functional nature and topological features of these constructs have not yet been investigated using the same experimental approach. This study investigated the common and distinct neural correlates of emotion regulation and empathy using a meta-analytic approach. The regions that were jointly activated were then characterized using meta-analytic connectivity modeling and functional decoding of metadata terms. The results revealed convergent activity within the ventrolateral and dorsomedial prefrontal cortex as well as temporal regions. The functional decoding analysis demonstrated that emotion regulation and empathy were related to highly similar executive and internally oriented processes. This synthesis underlining strong functional and neuronal correspondence between emotion regulation and empathy could (i) facilitate greater integration of these two separate lines of literature, (ii) accelerate progress toward elucidating the neural mechanisms that support social cognition, and (iii) push forward the development of a common theoretical framework for these psychological processes essential to human social interactions.

Effectiveness of educational interventions on evidence-based practice for nurses in clinical settings: A systematic review and meta-analysis

OBJECTIVES

This study aimed to synthesise the best available evidence on the effectiveness of education interventions to teach evidence-based practice (EBP) on nurse-related and patient-related outcomes.

DESIGN

This is a systematic review and meta-analytic paper.

DATA SOURCES

Published and unpublished studies in English were searched from 10 databases from 2005 to 2021.

REVIEW METHODS

Randomised controlled trials (RCTs) and clinical controlled trials (CCTs) describing education interventions to improve EBP knowledge, skills, attitude, confidence and behaviours among nurses were eligible. Two reviewers independently screened, appraised and extracted data. Meta-analysis was conducted using a random-effect model to synthesise data using review manager software. Standardised mean difference (SMD) represented an effect measure. Heterogeneity was assessed using Cochran-Q square test and I square statistics. Subgroup and narrative synthesis were also conducted.

RESULTS

Ten studies (6 RCTs and 4 CCTs) were selected for this review. Results from a CCT suggested that education interventions improved EBP knowledge with a large effect size (SMD = 2.01). Education interventions also enhanced EBP skills (n = 1), combined knowledge/skills (SMD = 0.48, N = 5), attitude toward EBP (SMD = 0.39, N = 4), confidence to conduct EBP (SMD = 0.43, n = 1) and EBP behaviour (SMD = 0.26, n = 5). None of the studies used patient-related outcomes.

CONCLUSION

Overall, education interventions improved nurses' EBP knowledge, skills, attitude, confidence and behaviour. EBP education interventions should be part of nurses' professional development in clinical settings. The interventions may be delivered through combined lectures, group discussions, hands-on practice via face-to-face and/or online learning. Future research should test education interventions using RCTs, large sample size, and in-depth qualitative data.

Hemispheric asymmetry of motor cortex excitability in mood disorders - Evidence from a systematic review and meta-analysis

OBJECTIVE

Mood disorders have been associated with lateralized brain dysfunction, on the left-side for depression and right-side for mania. Consistently, asymmetry of cortical excitability, as measured by transcranial magnetic stimulation (TMS) has been reported. Here, we reviewed and summarized work assessing such measures bilaterally in mood disorders.

METHODS

We performed a systematic review and extracted data to perform meta-analyses of interhemispheric asymmetry of motor cortex excitability, assessed with TMS, across different mood disorders and in healthy subjects. Additionally, potential predictors of interhemispheric asymmetry were explored.

RESULTS

Asymmetry of resting motor threshold (MT) among healthy volunteers was significant, favoring lower right relative to left-hemisphere excitability. MT was also significantly asymmetric in major depressive disorder (MDD), but with lower excitability of the left -hemisphere, when compared to the right, no longer observed in recovered patients. Findings on intracortical facilitation were similar. The few trials including bipolar depression revealed similar trends for imbalance, but with lower right hemisphere excitability, relative to the left.

CONCLUSIONS

There is interhemispheric asymmetry of motor cortical excitability in MDD, with lower excitability on left when compared to right-side. Interhemispheric asymmetry, with lower right relative to left-sided excitability, was found for bipolar depression and was also suggested for healthy volunteers, in a pattern that is clearly distinct from MDD.

SIGNIFICANCE

Mood disorders display asymmetric motor cortical excitability that is distinct from that found in healthy volunteers, supporting the presence of lateralized brain dysfunction in these disorders.

Association of rosacea with depression and anxiety: A systematic review and meta-analysis

BACKGROUND

Rosacea is associated with several comorbidities, but its relationship with psychiatric disorders remains controversial. We aimed to investigate the association of rosacea with depression and anxiety.

METHODS

A systematic review was performed of relevant observational studies in the PubMed, Web of Science, Embase, and Wanfang databases from inception to June 8, 2021. The inclusion criteria for eligible studies were observational studies comparing the incidence or prevalence of depression or anxiety between patients with rosacea and individuals without rosacea. We conducted meta-analyses with a random-effects model. The main outcome was pooled analysis of prevalence or incidence of depression and anxiety in patients with rosacea.

RESULTS

We included nine studies with 101,114,209 patients with rosacea. A pooled analysis from cross-sectional and case-control studies revealed that patients with rosacea were significantly more likely to have depression (crude odds ratio [OR], 2.855; 95% confidence interval [CI], 1.258-6.481) and anxiety (crude OR, 2.373; 95% CI, 1.448-3.888) than matched controls; however, adjusted ORs showed no significant association. Furthermore, the meta-analysis from cohort studies indicated that patients with rosacea have significantly higher risks of developing depression (adjusted incidence rate ratio [IRR], 2.443; 95% CI, 1.603-3.723) and anxiety (adjusted IRR, 2.181; 95% CI, 1.660-2.864).

LIMITATIONS

Data for a subgroup analysis based on different demographic factors were insufficient.

CONCLUSIONS

Current findings provide more evidence that rosacea is significantly associated with depression and anxiety, and rosacea may predispose patients to develop depression and anxiety. Clinicians should be aware of the psychological aspects of rosacea.

Do Patients with Prostate Cancer Benefit from Exercise Interventions? A Systematic Review and Meta-Analysis

Men diagnosed and treated for prostate cancer experience severe adverse effects on quality of life (QoL) and metabolic health, some of which may be preventable or reversible with exercise, the benefits of which healthcare providers and patients increasingly acknowledge, though existing evidence on its effects varies in significance and magnitude. We aimed to review the effect of exercise on QoL and metabolic health in a broad prostate cancer population. A systematic search was conducted in nine databases and eligible trials were included in the meta-analytic procedure. All outcomes were stratified into aerobic exercise, resistance exercise, and a combination of both. The review identified 33 randomised controlled trials (2567 participants) eligible for inclusion. Exercise had a borderline small positive effect on cancer-specific QoL (standardised mean difference (SMD) = 0.10, 95% confidence interval (CI) -0.01-0.22), and a moderate to large effect on cardiovascular fitness (SMD = 0.46, 95% CI 0.34-0.59) with aerobic exercise being the superior modality (SMD = 0.60, 95% CI 0.29-0.90). A positive significant effect was seen in lower body strength, whole-body fat mass, general mental health, and blood pressure. No significant effect was seen in fatigue, lean body mass, and general physical health. We thereby conclude that exercise is effective in improving metabolic health in men diagnosed with prostate cancer, with aerobic exercise as the superior modality. The effect of exercise on QoL was small and not mediated by choice of exercise modality.

Air Pollution in Poland: A 2022 Narrative Review with Focus on Respiratory Diseases

According to the World Bank Group, 36 of the 50 most polluted cities in the European Union are in Poland. Thus, ambient air pollution and its detrimental health effects are a matter of immense importance in Poland. This narrative review aims to analyse current findings on air pollution and health in Poland, with a focus on respiratory diseases, including COVID-19, as well as the Poles’ awareness of air pollution. PubMed, Scopus and Google Scholar databases were searched. In total, results from 71 research papers were summarized qualitatively. In Poland, increased air pollution levels are linked to increased general and respiratory disease mortality rates, higher prevalence of respiratory diseases, including asthma, lung cancer and COVID-19 infections, reduced forced expiratory volume in one second (FEV1) and forced vital capacity (FVC). The proximity of high traffic areas exacerbates respiratory health problems. People living in more polluted regions (south of Poland) and in the winter season have a higher level of air pollution awareness. There is an urgent need to reduce air pollution levels and increase public awareness of this threat. A larger number of multi-city studies are needed in Poland to consistently track the burden of diseases attributable to air pollution.

How do we measure gender discrimination? Proposing a construct of gender discrimination through a systematic scoping review

BACKGROUND

Gender discrimination (GD) has been frequently linked to mental health. The heterogeneity of how GD is defined has led to variation around the analysis of GD. This might affect the study of the association between GD and health outcomes. The main goal of this systematic scoping review is to operationalize the definition of the GD construct.

METHODS

Three search strategies were set in Pubmed, CINAHL and PsycINFO. The first strategy obtained results mainly about women, while the second focused on men. The third strategy focused on the identification of GD questionnaires. The prevalence of GD, factors and consequences associated with GD perception, and forms of discrimination were the principal variables collected. Risk of bias was assessed (PROSPERO:CRD42019120719).

RESULTS

Of the 925 studies obtained, 84 were finally included. 60 GD questionnaires were identified. GD prevalence varied between 3.4 and 67 %. Female gender and a younger age were the factors most frequently related to GD. Poorer mental health was the most frequent consequence. Two components of the GD construct were identified: undervaluation (different recognition, opportunities in access, evaluation standards and expectations) and different treatment (verbal abuse and behaviour).

CONCLUSIONS

Two-component GD definition can add order and precision to the measurement, increase response rates and reported GD.