Some notes on critical appraisal of prevalence studies: Comment on: "The development of a critical appraisal tool for use in systematic reviews addressing questions of prevalence"

The prevalence of patient-reported cognitive complaints and dementia risk factors in the audiology clinic

BACKGROUND

Hearing-dementia research mainly focuses on determining the causal direction of this association. Little is known about the prevalence of cognitive problems in a representative audiology patient population.

AIM

To examine the occurrence of self-reported cognitive complaints (SCC) and dementia risk factors (RF) in an audiology patient population.

MATERIALS AND METHODS

Patients visiting audiology clinics (n = 1100, 51% female and avg. age 61yrs) were administered an online intake tool based on the International Classification of Functioning Disability and Health. Domains extracted for analyses were memory and concentration (SCC) and loneliness, depression, sleep and vision (dementia RF) and self-reported hearing problems (SHP). Prevalence rates and associations with demographic variables and SHP were examined.

RESULTS

SCC were highly prevalent, with over half of the patients reporting memory or concentration problems. Regarding dementia RF, 68% reported sleeping problems and > 50% reported sadness, anxiety or depressed mood. SHP correlated significantly with self-reported memory problems, loneliness, and vision problems.

CONCLUSION

This descriptive cohort-study suggests a high risk of cognitive issues within the audiology clinic population, indicated by the high prevalence of SCC and some dementia RF. Our findings underscore the importance of considering closer cooperation between care pathways like audiology and neurology and use of a holistic patient-centered approach.

Characteristics and completeness of reporting of systematic reviews of prevalence studies in adult populations: a metaresearch study

OBJECTIVES

The Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) statement, first published in 2009, has been widely endorsed and compliance is high in systematic reviews (SRs) of intervention studies. SRs of prevalence studies are increasing in frequency, but their characteristics and reporting quality have not been examined in large studies. Our objectives were to describe the characteristics of SRs of prevalence studies in adults, evaluate the completeness of reporting, and explore study-level characteristics associated with the completeness of reporting.

STUDY DESIGN AND SETTING

We did a metaresearch study. We searched 5 databases from January 2010 to December 2020 to identify SRs of prevalence studies in adult populations. We used the PRISMA 2009 checklist to assess completeness of reporting and recorded additional characteristics. We conducted a descriptive analysis of review characteristics and linear regression to assess the relationship between compliance with PRISMA and publication characteristics.

RESULTS

We included 1172 SRs of prevalence studies. The number of reviews increased from 25 in 2010 to 273 in 2020. The median PRISMA score for SRs without meta-analysis was 17.5 of a maximum of 23, and for SRs with meta-analysis, 22 of a maximum of 25. Completeness of reporting, particularly for key items in the methods section, was suboptimal. SRs that included a meta-analysis or reported using a reporting or conduct guideline were the factors most strongly associated with increased compliance with PRISMA 2009.

CONCLUSION

Reporting of SRs of prevalence was adequate for many PRISMA items. Nonetheless, this study highlights aspects for which special attention is needed. Development of a specific tool to assess the risk of bias in prevalence studies and an extension to the PRISMA statement could improve the conduct and reporting of SRs of prevalence studies.

The prevalence of perinatal mental health disorders and psychosocial characteristics of women in Malta: A cross-sectional study

BACKGROUND

Perinatal mental health disorders (PMHDs) are associated with a myriad of negative outcomes for women, infants, and the rest of the family unit. Understanding the prevalence of these conditions is important to guide prevention and treatment pathways. Indeed, the burden of PMHDs has been studied in many countries, but for Malta, an island with an annual birth rate of 4500 births, this burden is still to be determined. The main objective of this study was to address this gap, determine the prevalence of PMHDs among postpartum women in Malta, and study associated psychosocial determinants for this population.

METHODS

A cross-sectional epidemiological study was conducted between March and April 2022 to determine the point prevalence of postpartum PMHDs in Malta. A representative, random sample of 243 postnatal mothers were recruited and screened for mental health issues using a two stage approach incorporating symptom scales and a diagnostic interview.

RESULTS

The point prevalence of postnatal PMHDs in Malta, according to a diagnostic interview, was found to be 21.4%. Anxiety disorders were the most prevalent conditions (16.8%), followed by obsessive-compulsive disorder (6.1%) and borderline personality disorder (5.6%), respectively. A higher rate of 32.1% was identified with self-report measures.

CONCLUSIONS

PMHDs are highly prevalent, affecting approximately 20% of women in Malta across the first postnatal year. The value of this finding accentuates the need for service availability and the implementation of perinatal mental health screening programs.

Global Prevalence of Childhood Exposure to Physical Violence within Domestic and Family Relationships in the General Population: A Systematic Review and Proportional Meta-Analysis

Efforts to identify and prevent childhood exposure to physical violence within domestic and family relationships must be underpinned by reliable prevalence estimates to ensure the appropriate allocation of resources and benchmarks for assessing intervention efficacy. We conducted a systematic review and meta-analysis of the global prevalence of childhood exposure to physical domestic and family violence separately as a victim or witness. Searches were conducted in Criminal Justice Abstracts, Embase, Scopus, PubMed, PsychInfo, and Google Scholar. Studies were included if they were peer-reviewed, published in English, had a representative sample, unweighted estimates, and were published between January 2010 and December 2022. One-hundred-and-sixteen studies comprising 56 independent samples were retained. Proportional meta-analysis was conducted to calculate the pooled prevalence for each exposure. Pooled prevalence estimates were also stratified by region and sex. The global pooled prevalence of childhood exposure to physical domestic and family violence as a victim or witness was 17.3% and 16.5%, respectively. Prevalence estimates were highest in West Asia and Africa (victim = 42.8%; witness = 38.3%) and lowest for the Developed Asia Pacific region (victim = 3.7%; witness = 5.4%). Males were 25% more likely than females to be the victim of physical domestic and family violence during childhood, while both were equally likely to have witnessed it. These findings suggest that childhood exposure to domestic and family violence is relatively common, affecting around one-in-six people by 18 years of age globally. Regional variations in prevalence estimates may reflect underlying economic conditions, cultural norms, and service availability.

Age distribution of East Asian TMD patients and age-related differences in DC/TMD axis I findings

OBJECTIVES

The pattern of age distribution in East Asian temporomandibular disorder (TMD) patients and age-related differences in DC/TMD diagnostic subtypes/categories were evaluated.

SUBJECTS AND METHODS

TMD patients from two University-based centers in China and South Korea were enrolled. Axis I physical diagnoses were rendered according to DC/TMD. Patients were categorized into six age groups (15-24, 25-34, 35-44, 45-54, 55-64, and 65-84 years; Groups A-F respectively).

RESULTS

Youths/young adults (Groups A-C) formed 74.1% of TMD patients. TMJ disc displacements (74.9%), arthralgia (49.2%), and degenerative joint disease [DJD] (36.8%) were the most common TMD subtypes. The majority had combined (54.0%) and chronic (58.5%) TMDs. Youths/young adults and middle-aged/old adults had substantially lower frequencies of merely pain-related (6.2-14.5%) and intra-articular (13.8-16.8%) TMDs correspondingly. "Being female" increased the prospects of pain-related/combined TMDs by 96%/49%, respectively.

CONCLUSIONS

East Asian TMD patients comprised mostly of youths/young adults who had an alarmingly high prevalence of TMJ DJD.

DC/TMD axis I subtyping: generational and gender variations among East Asian TMD patients

OBJECTIVES

This study examined the generational-gender distinctions in Diagnostic Criteria for Temporomandibular disorders (DC/TMD) subtypes among East Asian patients.

METHODS

Consecutive "first-visit" TMD patients presenting at two university-based TMD/orofacial pain clinics in China and South Korea were enlisted. Demographic information along with symptom history was gathered and clinical examinations were performed according to the DC/TMD methodology. Axis I physical diagnoses were rendered with the DC/TMD algorithms and categorized into painful and non-painful TMDs. Patients were categorized into three birth cohorts, specifically Gen X, Y, and Z (born 1965-1980, 1981-1999, and 2000-2012 respectively) and the two genders. Data were evaluated using Chi-square/Kruskal-Wallis plus post-hoc tests and logistic regression analyses (α = 0.05).

RESULTS

Gen X, Y, and Z formed 17.2%, 62.1%, and 20.7% of the 1717 eligible patients examined (mean age 29.7 ± 10.6 years; 75.7% women). Significant differences in prevalences of arthralgia, myalgia, headache (Gen X ≥ Y > Z), and disc displacements (Gen Z > Y > X) were observed among the three generations. Gen Z had substantially fewer pain-related and more intra-articular conditions than the other generations. Women presented a significantly greater frequency of degenerative joint disease and number of intra-articular conditions than men. After controlling for generation-gender interactions, multivariate analyses showed that "being Gen X" and female increased the risk of painful TMDs (OR = 2.20) and reduced the odds of non-painful TMDs (OR = 0.46).

CONCLUSIONS

Generational-gender diversities in DC/TMD subtypes exist and are important for guiding TMD care and future research endeavors.

Prolonged grief disorder prevalence in adults 65 years and over: a systematic review

BACKGROUND

Prolonged grief disorder (PGD) is a recently recognised mental health disorder with an estimated prevalence of 10% in the bereaved adult population. This review aims to appraise and summarise evidence relating to PGD in older adults (≥65 years), a growing population group, most likely to experience bereavement and often assumed to cope well.

METHOD

Literature from Medline, PsycINFO, CINAHL, Cochrane Library and Web of Science was searched. Epidemiological and non-epidemiological studies including data on frequency of PGD in older adults bereaved by mainly natural causes were included and a descriptive analysis undertaken.

RESULTS

From 2059 records, three epidemiological and six non-epidemiological studies were included. Most studies had good internal but not external validity. Conditional prevalence for PGD ranged between 3.2% and 48.8%. Heterogeneity in sample characteristics and study methodology contributed to this variability resulting in a descriptive analysis. The prevalence rate of 9.1% by Kersting et al was the best available estimate for PGD in older adults for western countries. The small number of epidemiological studies and the use of varying PGD-constructs which did not match International Classification of Diseases 11th Revision and Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition criteria were the main limiting factors.

CONCLUSION

This first review on PGD prevalence in older adults suggests that, despite studies' methodological short comings, a similar proportion of older adults experience PGD as the general bereaved adult population (1:10). With older adults forming the largest subgroup among the bereaved, health and social care systems need to adapt their provision of care to address the specific needs of older adults.

DC/TMD Axis I diagnostic subtypes in TMD patients from Confucian heritage cultures: a stratified reporting framework

OBJECTIVES

This study proposed a conceptual framework for reporting Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) Axis I conditions and investigated the prevalence of TMD subtypes/categories in patients from Confucian heritage cultures. Variances in gender, age, and TMD chronicity between Chinese (CN) and Korean (KR) patients were also explored.

MATERIALS AND METHODS

Subjects were recruited from consecutive patients seeking care at two University-based centers in Beijing and Seoul. Eligible patients completed a demographic survey as well as the DC/TMD Symptom Questionnaire and were clinically examined according to the DC/TMD methodology. Axis I diagnoses were subsequently rendered with the DC/TMD algorithms and documented using the stratified reporting framework. Statistical evaluations were performed with chi-square, Mann-Whitney U tests, and logistic regression analysis (α = 0.05).

RESULTS

Data of 2008 TMD patients (mean age 34.8 ± 16.2 years) were appraised. Substantial differences in female-to-male ratio (CN > KR), age (KR > CN), and TMD duration (KR > CN) were observed. Ranked frequencies of the most common Axis I diagnoses were: CN - disc displacements (69.7%) > arthralgia (39.9%) > degenerative joint disease (36.7%); KR - disc displacements (81.0%) > myalgia (60.2%) > arthralgia (56.1%). Concerning TMD categories, notable differences in the prevalence of intra-articular (CN 55.1% > KR 15.4%) and combined (KR 71.8% > CN 33.4%) TMDs were discerned.

CONCLUSIONS

Though culturally similar, the two countries require disparate TMD care planning/prioritization. While TMJ disorders in children/adolescents and young adults should be emphasized in China, the focus in Korea would be on TMD pain in young and middle-aged adults.

CLINICAL RELEVANCE

Besides culture, other variables including socioeconomic, environmental, and psychosocial factors can influence the clinical presentation of TMDs. Chinese and Korean TMD patients exhibited significantly more intra-articular and combined TMDs respectively.

Global prevalence of social isolation among community-dwelling older adults: A systematic review and meta-analysis

BACKGROUND

While the world's population ages, social isolation has continued to increase globally. However, no review exists on the prevalence of social isolation among community-dwelling older adults, and the global prevalence remains uncertain. This study aims to estimate the global prevalence of social isolation among community-dwelling older adults and to identify potential covariates including study characteristics (methodological diversity) or populations (clinical diversity) that contribute to the heterogeneity.

METHODS

This review searched through seven search engines and databases. The meta-analysis was conducted using the metafor package in the R software. The random-effects model was used to calculate the prevalence rates. Cochran's Q statistics and I² statistics were used to assess the statistical heterogeneity of prevalence estimates. Studies were appraised using the Newcastle-Ottawa Scale and the Grading of Recommendations, Assessment, Development, and Evaluations criteria for the quality of individual articles and the certainty of the evidence, respectively.

RESULTS

A total of 41 studies were selected from databases and reference lists. The pooled prevalence rate was 25% (95% CI: 21.0-30.0). The sample size was found to be a significant covariate of the prevalence estimate in the subgroup analysis.

CONCLUSIONS

We found 13 high-quality studies, but the overall quality of evidence very low. This study provides the prevalence of social isolation in community-dwelling older adults, identifying vulnerable groups for targeted intervention. Well-designed observational research with standard measures is recommended for future studies.

A tool to assess risk of bias in studies estimating the prevalence of mental health disorders (RoB-PrevMH)

Objective

Biases affect how certain we are about the available evidence, however no standard tool for assessing the risk of bias (RoB) in prevalence studies exists. For the purposes of a living systematic review on prevalence of mental health disorders during the COVID-19 pandemic, we developed a RoB tool to evaluate prevalence studies in mental health (RoB-PrevMH) and tested interrater reliability.

Methods

We reviewed existing RoB tools for prevalence studies until September 2020, to develop a tool for prevalence studies in mental health. We tested the reliability of assessments by different users of RoB-PrevMH in 83 studies stemming from two systematic reviews of prevalence studies in mental health. We assessed the interrater agreement by calculating the proportion of agreement and Kappa statistic for each item.

Results

RoB-PrevMH consists of three items that address selection bias and information bias. Introductory and signaling questions guide the application of the tool to the review question. The interrater agreement for the three items was 83%, 90% and 93%. The weighted kappa was 0.63 (95% CI 0.54 to 0.73), 0.71 (95% CI 0.67 to 0.85) and 0.32 (95% CI -0.04 to -0.63), respectively.

Conclusions

We developed a brief, user friendly, and adaptable tool for assessing RoB in studies on prevalence of mental health disorders. Initial results for interrater agreement were fair to substantial. The tool's validity, reliability, and applicability should be assessed in future projects.

Marital dissolution and associated factors in Hosanna, Southwest Ethiopia: a community-based cross-sectional study

BACKGROUND

Marriage dissolution, divorce, or separation from a spouse or common-law partner is a serious public health concern due to its increasing prevalence and devastating health and socio-economic consequences. Evidence suggests an increased risk of marital instability in Ethiopia. In addition, the extent of marital dissolution and other related factors have increased in the study area. Despite these, the prevalence of marital dissolution and the influence of associated factors (main reason for marriage, and parental history of marital dissolution) on marital dissolution has not been assessed in the study area. Therefore, the aim of this study was to investigate the prevalence of marital dissolution and its associated factors among residents of Hosanna town in southwestern Ethiopia in 2022.

METHODS

We conducted a community-based cross-sectional study among 459 randomly selected Hosanna Township residents. We used structured questionnaires to collect data. Descriptive statistics and logistic regression were performed to describe the data and test-associated factors, respectively. A p-value less than 0.05 was used to define statistical significance. We used STATA 14 and IBM SPSS 25.0 computer packages to process data.

RESULTS

Out of the 459 potentially eligible individuals, 450 participants properly responded to the questionnaires yielding a response rate of 98.04%. Of these, 218 (52.9%) were female. The commonly reported reason for marriage was to have children 150 (36.9%). The prevalence rate of marital dissolution was 26.0% (95% CI: (21.7%, 30.3%)). The participant's level of education and the primary reasons (motives) why they get married were statistically significantly associated with marital dissolution. The odds of marital dissolution was higher among participants who completed secondary education (AOR = 3.2, 95% CI = 1.26-8.17) compared to those having no formal education. The participants who married for companionship reasons (AOR = 0.31, 95% CI = 0.11-0.83) had significantly lower odds of marriage dissolution compared with those who married for financial security.

CONCLUSIONS

In this study, the prevalence of marital dissolution was high. The participant's level of education and the primary reasons (motives) why they getting married were significantly associated with marital dissolution. Therefore, an integrated, community-based approach should be developed to prevent marital dissolution.

The GA2LEN survey for chronic rhinosinusitis prevalence studies: Arabic translation, cultural adaptation, and validation

Background: Chronic rhinosinusitis (CRS) is a common disease that significantly impacts quality of life. Its prevalence varies between different geographical areas. This study aimed to validate the Arabic version of the EPOS criteria in the GA2LEN questionnaire to use it as a tool to estimate the prevalence of CRS in Arab countries. Methods: This is multicentric cross-sectional validation study. The original English EPOS criteria used in the GA2LEN survey (four main questions and two additional questions) were translated into Arabic. The study was conducted at King Abdulaziz University Hospital – Riyadh and Qatif Central Hospital – Qatif in the period between October 2020 and August 2021. Groups of CRS and non-CRS patients were selected randomly from databases of the hospital and asked to participate in the study through phone calls. Sensitivity, specificity, positive, and negative predictive values were calculated for the Arabic questionnaire. Results: Of 200 subjects contacted to complete the questionnaire, 128 agreed to participate and completed the survey. The Arabic version of the GA2LEN questionnaire was found to be reliable with high sensitivity and specificity. The reliability of the questionnaire increased when we added the question, “Has a doctor ever told you that you have chronic sinusitis?” to the main four questions. The sensitivity, specificity, and positive and negative predictive values were 93.9%, 59.6%, 71.25%, and 90.2%, respectively. Conclusions: The Arabic version of the EPOS criteria in the GA2LEN questionnaire is a valid and reliable tool for epidemiological studies to estimate the prevalence of CRS.

The apparent prevalence, the true prevalence

Serologic tests are important for conducting seroepidemiologic and prevalence studies. However, the tests used are typically imperfect and produce false-positive and false-negative results. This is why the seropositive rate (apparent prevalence) does not typically reflect the true prevalence of the disease or condition of interest. Herein, we discuss the way the true prevalence could be derived from the apparent prevalence and test sensitivity and specificity. A computer simulation based on the Monte-Carlo algorithm was also used to further examine a situation where the measured test sensitivity and specificity are also uncertain. We then complete our review with a real example. The apparent prevalence observed in many prevalence studies published in medical literature is a biased estimation and cannot be interpreted correctly unless we correct the value.

PREVALENCE AND PREDICTORS OF POSTTRAUMATIC STRESS DISORDER, DEPRESSION, AND ANXIETY IN PERSONNEL WORKING IN EMERGENCY DEPARTMENT SETTINGS: A SYSTEMATIC REVIEW

BACKGROUND

Professionals working in the emergency department (ED) are regularly exposed to traumatic events. Rates of posttraumatic mental health conditions vary widely in the literature and there is no agreement that rates in ED staff are elevated relative to other populations.

OBJECTIVE

We conducted a systematic review of international literature reporting prevalence of posttraumatic stress disorder (PTSD), depression, and anxiety in ED personnel to determine whether prevalence is elevated compared to the general community, and to evaluate convergent evidence across the literature for predictive factors. To our knowledge, there is no comprehensive review on this topic in the literature at this time.

METHODS

Seven databases were searched for studies reporting rates of PTSD, depression, and anxiety in ED personnel. Two independent researchers screened studies and assessed quality using Munn's Prevalence Critical Appraisal Instrument. Best-evidence synthesis determined whether conditions demonstrated elevated prevalence compared to the general population of Canada, a conservative benchmark.

RESULTS

Twenty-four studies from 12 countries and a combined sample size of 4768 were included. PTSD rates ranged from 0% to 23.6% (mean 10.47%), depression ranged from 0.7% to 77.1% (mean 24.8%), and anxiety rates ranged from 2.4% to 14.6% (mean 9.29%). Each condition was elevated compared to the general population. Sociodemographic variables were not consistent predictors. Elevated PTSD seemed most strongly related to workplace exposure and maladaptive coping.

CONCLUSIONS

ED professionals have an elevated risk of experiencing PTSD, depression, and anxiety. Identification of organizational and workplace predictors are needed to inform interventions that will reduce risk and provide optimal treatment and management of PTSD, depression, and anxiety in ED settings.

Prevalence of the need for adaptive seating systems among children with cerebral palsy in Egypt

BACKGROUND

An adaptive seating system is a basic rehabilitation need for children and youth with cerebral palsy (CP) as it supports the structure and function of the musculoskeletal system and can positively affect their activities and participation. Despite the importance of adaptive seating systems, there is limited access to such systems in low-income countries.

OBJECTIVES

To determine the percentage of children and youth between 4 and 18 years of age with CP in Egypt whose activity level and sitting ability suggest the need for an adaptive seating system.

STUDY DESIGN

Observational cross-sectional study.

METHODS

One hundred ninety-three participants were included after fulfilling the criteria of the Surveillance of Cerebral Palsy of Europe. Their level of activity was assessed by a physical therapist using the Gross Motor Function Classification System (GMFCS), and their sitting ability was evaluated using the Level of Sitting Scale (LSS). Participants were considered to require an adaptive seating system if they scored GMFCS level IV or V and LSS level 1-5 concurrently.

RESULTS

Approximately 44% of the study participants were classified as GMFCS level IV or V and LSS level 1-5, suggesting that they were in need of an adaptive seating system.

CONCLUSIONS

There is a large percentage of children and youth with CP in Egypt who need an adaptive seating system to be integrated into their rehabilitation.

Treatment rates for alcohol use disorders: a systematic review and meta-analysis

AIMS

To estimate the treatment rate for alcohol use disorders (AUDs) in the general adult population. Treatment rates were also considered in relation to economic differences.

METHODS

Systematic review and meta-analysis. We searched PubMed, EMBASE, PsycINFO and CINAHL databases to identify studies that reported treatment rates for alcohol use disorders in the general population. Independent reviewers screened the articles based on predefined inclusion criteria. Data were extracted using a standardized data extraction form. We conducted quality assessments of the included studies. The overall treatment rates were estimated from studies that reported any treatment for AUDs from healthcare or informal non-healthcare settings (any treatment). We estimated the separate treatment rates for each diagnostic category as reported in the primary studies: AUD as a single disorder, alcohol abuse and alcohol dependence. Data were pooled using a random-effect model.

RESULTS

Thirty-two articles were included to estimate the treatment rates (percentage treated among the total number of people with AUDs). The pooled estimate of people with AUDs who received any treatment were 14.3% (95% CI: 9.3-20.3%) for alcohol abuse, 16.5% (95% CI: 12-21.5%) for alcohol dependence and 17.3% (95% CI: 12.8-22.3%) for AUD. A subgroup analysis by World Bank economic classification of countries found that the treatment rate for AUD was 9.3% (95% CI: 4.0-15.7%) in low and lower-middle-income countries.

CONCLUSION

Globally, approximately one in six people with AUDs receives treatment. Treatment rates for AUDs are generally low, with even lower rates in low and lower-middle-income countries.

Use of electronic medical records to describe the prevalence of allergic diseases in Canada

Background

Leveraging the data management resources of the Canadian Primary Care Sentinel Surveillance Network (CPCSSN) is a viable approach for describing the prevalence of allergic disease documented in primary care settings.

Methods

The dataset used for this study was inclusive of data from EMR initiation up to Dec 31st 2018. The sample included 1235 primary care providers representing 1,556,472 patients across Canada.

Results

In total, there were 536,005 patients with a documented allergy that fit into one of the 10 suggested categories. The allergy table includes 718,032 distinct entries representing 564,242 unique patients, which is 36.3% of the patients within the CPCSSN repository. The most common allergies recorded were drug allergy (39.0%), beta-lactam allergy (14.4%), environmental allergy (11.0%), and food allergy (8.0%). Anticipated upcoming studies include physician-documented drug allergy with a focus on beta-lactam allergy, as well as stinging insect allergy, among others. To our knowledge, these will also be the first such prevalence studies of primary care physician-documented allergic disease done in Canada.

Interpretation

The CPCSSN dataset represents electronic medical records from 1.5 million patients across Canada including documentation of allergic diseases. This dataset provides a national representative population to describe and characterize Canadian patients with common allergic conditions. This robust dataset provides the opportunity for health surveillance, and in particular data to explore the impact of allergic disease on primary care practice.

Trial registration

Not applicable.

A systematic review and meta-analysis of the prevalence of therapeutic targets in cervical cancer

Cervical Cancer (CC) is a significantly prevalent disease in developing countries. Currently, targeted therapies are not a primary standard of care in CC. This information could be crucial for developing directed therapies and patient screening for biomarkers that would allow personalised treatment of CC. This systematic review aimed to estimate the prevalence of potential therapeutic targets such as the epidermal growth factor receptor (EGFR) and the PI3K/Akt/mTOR and Ras/Raf/MAPK pathways in patients with CC, identified through genomic and non-genomic testing. Studies were identified through an ad-hoc search strategy from the available on MEDLINE (Ovid), CENTRAL, LILACS, SCOPUS, through the Clinical Trial registry on Clinicaltrials.gov, International Clinical Trials Registry Platform, RENIS (Argentine National Registry of Health Research) and grey literature sources. We included 74 studies which represented a total pool of 7,862 participants. Forty-five studies informed mutations of EGFR, with a combined positivity rate of 53% (95%CI: 45%-60%; I2 = 95%). Twenty studies informed the presence of mutations in PIK3CA with a combined positivity rate of 30% (95%CI: 21%-39%; I2 = 96%). Twenty-three studies reported a mutation in Ras, with a combined positivity rate of 14% (95%CI: 8%-21%; I2 = 95%). Raf mutations were informed in six studies. Six studies informed the presence of Akt mutations, two studies informed mTOR mutations and only one study reported mutations of MAPK. The most frequently described therapeutic targets were EGFR, and the PIK3CA and Ras pathways, though inconsistency in positivity rates was significant. Our study did not allow the identification of any specific clinical characteristics that might explain the observed heterogeneity. Despite the overall good quality of the included studies, the applicability of these results to patients' general population with CC is still unclear.

Prevalence and Trends in Management of Idiopathic Normal Pressure Hydrocephalus in the United States: Insights from the National Inpatient Sample

BACKGROUND

Over the past 2 decades, management of idiopathic normal pressure hydrocephalus (iNPH) has evolved significantly. In the current study, we sought to evaluate the national prevalence and management trends of iNPH in the United States using a national database.

METHODS

The National Inpatient Sample was queried for patients with an International Classification of Diseases diagnosis code for iNPH from 2007 to 2017. Trends in prevalence and procedure type were evaluated per 100,000 discharges and as a percentage of discharges, using weighted discharges. Utilization of procedure type across U.S. regions and hospital types was also compared.

RESULTS

From 2007 to 2017, 302,460 weighted discharges with any diagnosis code for iNPH, aged ≥60 years, were identified. Prevalence ranged from 0.04% to 0.20% (41/100,000 to 202/100,000) among admitted patients ≥60 years old, giving an average prevalence during the study duration of 0.18% (179/100,000). Of 66,759 weighted discharges with a primary diagnosis code of iNPH undergoing surgical management, ventriculoperitoneal shunt (72.0% of discharges, n = 48,977) was most commonly used; of these, 9.3% (n = 4567) were performed laparoscopically. This result was followed by lumbar peritoneal shunt (15.1% of discharges, n = 10,441). Up to 15.1% (n = 9990) of discharges reported only a lumbar puncture, assumed to be only diagnostic, for screening, or part of serial cerebrospinal fluid removal procedures. Significant discrepancies in procedure utilization were also identified among hospitals in the Western, Southern, Northeast and Midwest regions, as well as between urban and rural hospitals (P < 0.05).

CONCLUSIONS

We have summarized the national prevalence of iNPH, trends in its management over the previous decade and trends by region and hospital type.

Quality assessment of prevalence studies: a systematic review

OBJECTIVES

The objective of the study is to identify items and domains applicable for the quality assessment of prevalence studies.

STUDY DESIGN AND SETTING

We searched databases and the gray literature to identify tools or guides about the quality assessment of prevalence studies. After study selection, we abstracted questions applicable for prevalence studies and classified into at least one of the following domains: 'population and setting', 'condition measurement', 'statistics', and 'other'. PROSPERO registration:CRD42018088437.

RESULTS

We included 30 tools: eight (26.7%) specifically designed to appraise prevalence studies and 22 (73.3%) adaptable for this purpose. We identified 12 unique items in the domain "population and setting", 16 in the domain "condition measurement", and 14 in the domain "statistics". Of those, 25 (59.5%) were identified in the eight specific tools. Regarding the domain "other", we identified 77 unique items, mainly related to manuscript writing and reporting (n = 48, 62.3%); of those, 24 (31.2%) were identified in the eight specific tools and 53 (68.8%) in the additional 22 nonspecific tools.

CONCLUSION

We provide a comprehensive set of items classified by domains that can guide the appraisal of prevalence studies, conduction of primary prevalence studies, and update or development of tools to evaluate prevalence studies.

Anxiety in Informal Dementia Carers: A Meta-Analysis of Prevalence

Much of the carer literature has focused on depression and burden as primary outcomes and anxiety appear somewhat neglected. Providing evidence on the prevalence of carer anxiety is critical as it can enhance awareness among professionals, which in turn can lead to improved access to efficacious treatments. This meta-analysis updated the previous review conducted in 2007 to estimate the up-to-date prevalence of anxiety in informal carers for people with dementia. Literature searches were conducted in databases of published and unpublished literature. Events and sample size data were pooled using a random effects model to obtain an overall prevalence percentage. A total of 10 studies were included, resulting in a pooled estimate of anxiety prevalence at 32.1% (95% confidence interval: 20.6%-46.2%, P = .01). Significant heterogeneity was found, which was not reduced following sensitivity analysis. This study suggests anxiety is a prevalent difficulty experienced by dementia carers. Additional research recommendations and clinical implications are discussed.

The prevalence of depression in patients living with implantable cardioverter defibrillator: a systematic review and meta-analysis

Depression is a common disorder in patients with implantable cardioverter defibrillator (ICD). There are a variety of studies estimated the prevalence of depression in these patients. The present study aimed to investigate the prevalence of depression in patients with ICD.

METHODS

In the present study, we conducted a systematic review of studies published in PubMed, Scopus, Web of Science (WoS), Medline, and EMBASE without any time filtration to obtain studies investigated the prevalence of depression in patients with ICD. Search terms consisted of "Implantable Cardioverter Defibrillator(s)" in combination with "depression," "depressive," "prevalence," "implanted cardioverter," "implantable," and "implantable defibrillator."

RESULTS

We identified 15 relevant studies, comprising data from 10,182 patients with ICD from whom 2400 (23.58%) (95% CI, 15.36-31.79) had depression. The results of the subgroup analysis showed that the prevalence of depression among middle-aged patients (28.58% with confidence interval of 95%, 21.51-35.65) was higher than elderly patients (22.23% with confidence interval of 95%, 11.21-33.24) and it was not significantly correlated with the mean age of samples (P = 0.255), sample size (P = 0.686), and the publication date (P = 0.784), although there was a significant correlation between the prevalence of depression and the quality of articles so that the prevalence was decreasing with an increase in the quality (P = 0.046).

CONCLUSION

Around 1 in 4 patients with ICD (23.58%) experiences depression progression after an ICD placement. This prevalence is comparable to that in the general population, and close to that of the patients with common chronic diseases.

Prevalence of intimidation, harassment, and discrimination among resident physicians: a systematic review and meta-analysis

BACKGROUND

The aim of this study was to establish the prevalence of intimidation, harassment, and discrimination (IHD) reported by resident physicians during their training, to identify factors associated with reported IHD, and to identify adverse sequalae associated with IHD.

METHODS

This review followed the PRISMA guidelines. Eight electronic databases were searched for cross-sectional studies reporting the prevalence of IHD among resident physicians. Prevalence estimates were pooledacross studies using random-effects meta-analysis, with variance stabilization using Tukey double arcsine transformation. Heterogeneity was assessed with forest plots, the I ² statistic, subgroup analyses, and multivariate meta-regression.

RESULTS

52 cross-sectional studies were included in the meta-analysis. The overall pooled prevalence of IHD was 64.1% (95% confidence interval [CI], 51.0-77.1). Verbal, physical, and sexual IHD were the most common forms of IHD reported by residents. Training status (55.5%), gender (41.7%), and ethnicity (20.6%) were the most commonly cited risk factors for IHD. The most common sources of IHD were relatives/friends of patients, nurses, and patients (cited by 50.7%, 47.8, and 41.7%, respectively).

CONCLUSIONS

The prevalence of IHD among resident physicians is high and associated with multiple negative outcomes, including burnout. Despite the availability of multiple anti-IHD interventions, reports of IHD appear to be rising in many residency programs.

An observational study found large methodological heterogeneity in systematic reviews addressing prevalence and cumulative incidence

OBJECTIVES

The objective of this study was to assess reporting and methodological aspects of systematic reviews (SRs) on prevalence and cumulative incidence data.

STUDY DESIGN AND SETTING

We searched PubMed up to 18 April, 2018, and drew a random sample of eligible SRs.

RESULTS

The included 215 SRs were reported in 187 different journals. 58.1% were published between 2015 and 2018. Few SRs were registered with PROSPERO (5.6%). One-quarter considered articles without languages restrictions (25.1%). Regional restrictions of included studies were applied in 22.8%. A meta-analysis was carried out in 40.5% of the SRs. One hundred and six studies (49.3%) assessed risk of bias or study quality. A total of 41 different existing tools as well as 15 tools developed by the authors themselves were used. The most commonly applied tools were the Newcastle-Ottawa Scale (15.1%), STROBE (13.5%), and the Cochrane Collaboration's tool for assessing risk of bias (7.9%).

CONCLUSION

We found large heterogeneity in characteristics, reporting, and methodological aspects of SRs on prevalence and cumulative incidence data, especially when compared with other types of SRs. Newly developed or revised guidance on how to conduct and report SRs as well as instruments for critical appraisal should consider the diversity of review types.

Prevalence of co-occurring psychiatric disorders in adults and adolescents with intellectual disability: A systematic review and meta-analysis

BACKGROUND

Subjects with intellectual disability (ID) are vulnerable to experience psychiatric disorders. The present authors performed a systematic review and meta-analysis to estimate the prevalence of co-occurring psychiatric disorders, excluding co-occurring autism spectrum disorders, in subjects with intellectual disability.

METHOD

The present authors performed a random-effects meta-analysis of the prevalence of psychiatric disorders in adults and adolescents with intellectual disability.

RESULTS

Twenty-two studies were included. The pooled prevalence of any co-occurring psychiatric disorders in intellectual disability was 33.6% (95% CI: 25.2%-43.1%) with high heterogeneity but no publication bias. Prevalence was lower in population-based studies, in studies that used ICD criteria for the psychopathology and in studies with low risk of bias. The prevalence was higher in mild, moderate and severe intellectual disability than in profound intellectual disability.

CONCLUSIONS

Psychiatric disorders are common in subjects with intellectual disability, and the present authors found that clinical and methodological moderators affect the pooled prevalence.

A Systematic Review and Meta-Analysis of the Prevalence of Methamphetamine Abuse in Iranian High School Students

Background and Aim: Abuse of drugs such as methamphetamine is one of the most important problems in high-school children and adolescents according to the World Health Organization (WHO), which has mentioned it as a concerning event in the world. Therefore, the purpose of this study was to estimate the prevalence of methamphetamine abuse in Iranian students using the meta-analysis method on studies conducted in Iran.

Materials and Methods: To select the studies, a systematic search was performed on leading databases, including ISI web of science, PubMed, Scopus, Embase, PsycINFO and PROSPERO with no language limits from their inception to 31 Jan 2018. Furthermore, local databases, including SID, Magiran, and IRANDOC were searched systematically using both Persian and English languages from their inception to 31 Jan 2018.

Results: We found a total of 828 potentially relevant studies, of which 30 met our criteria, and 7 articles (7452 students, 3063 females and 4389 males) were included. The pooled prevalence of methamphetamine use in Iranian students was 0.016% (95% CI: 0.06-0.041, P=0.00). The heterogeneity was low (I² =44.41, d.f = 6), which shows that about 94.41 of the total observed variance was true variance between the studies.

Conclusion: Although the prevalence of methamphetamine in high-school students is lower than in other drugs, a growing pattern in Iranian high-school students in recent years is a serious warning to authorities and families. Increasing families and students’ knowledge about the harmful effects of this drug can be an effective approach to reducing its prevalence in young people, especially high-school students.

Social outcomes for adults with a history of childhood-onset epilepsy: A systematic review and meta-analysis

OBJECTIVES

This review aimed to describe social outcomes in adulthood for people with a history of childhood-onset epilepsy and identify factors associated with these outcomes; focused on educational attainment, employment, income/financial status, independence/living arrangement, romantic relationships, parenthood, and friendships.

METHODS

A comprehensive search of MEDLINE, EMBASE, and PsycINFO was conducted, as well as forward and backward citation tracking. A total of 45 articles met inclusion criteria. Random effects meta-analyses were conducted, and subgroup analyses evaluated outcomes for people with epilepsy (PWE) with good prognosis (e.g., normal intelligence, 'epilepsy-only') and poor prognosis (e.g., intellectual disability, Dravet syndrome), and those who underwent epilepsy surgery in childhood.

RESULTS

Among all PWE, 73% (95% confidence interval [CI]: 64-82%) completed secondary school education, 63% (95%CI: 56-70%) were employed; 74% (95%CI: 68-81%) did not receive governmental financial assistance; 32% (95%CI: 25-39%) were in romantic relationships; 34% (95%CI: 24-45%) lived independently; 21% (95%CI:12-33%) had children, and 79% (95%CI: 71-87%) had close friend(s). People with epilepsy often fared worse relative to healthy controls. Among PWE with a good prognosis, a comparable number of studies reported similar/better outcomes relative to controls as reported poorer outcomes. The most consistent predictor of poorer outcomes was the presence of cognitive problems; results of studies evaluating seizure control were equivocal.

CONCLUSION

People with epilepsy with a good prognosis may show similar social outcomes as controls, though robust conclusions are difficult to make given the extant literature. Seizure control does not guarantee better outcomes. There is a need for more studies evaluating prognostic factors and studies with control groups to facilitate appropriate comparisons.

A systematic review protocol of stigma among children and adolescents with epilepsy

BACKGROUND

Epilepsy is a neurological condition that is highly prevalent among children and adolescents with 80% of the victims living in low- and middle-income countries (LMIC). Epilepsy is associated with high levels of both perceived and enacted stigma, which vary geographically and greatly affects the victims' quality of life and self-esteem. High rates of stigma are also a significant barrier to accessing medical care. Perceived and enacted epilepsy-related stigma is associated with various sociodemographic and clinical factors, which vary from place to place. Therefore, this review will determine the prevalence of stigma of epilepsy among children and adolescents and the associated factors worldwide.

METHODS

We will search for literature in PubMed, EMBASE, PsycINFO, and CINAHL databases as well as grey literature. We will also search via Google Scholar to capture relevant literature that may not be in the searched databases. We will then screen reference lists of included studies for more studies. Studies that have documented the prevalence of epilepsy-related perceived or enacted stigma and the associated factors will be eligible for inclusion. Data will be extracted in duplicates using a pre-piloted tool consisting of study and participant characteristics as well as pre-determined factors associated with epilepsy. Heterogeneity will be assessed by a forest plot and quantified by I2 statistic, and in case it is high, results will be reported as a narrative and it will further be explored by subgroup analysis. In case of homogeneity, meta-analysis will be done. Bias will be assessed using a critical appraisal tool developed for prevalence studies. The strength of evidence among the studies will be assessed using the GRADE approach.

DISCUSSION

Findings from this review will document the burden of stigma of epilepsy and the common contributing factors, which will form the building blocks of interventions that address this health challenge.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO CRD42017058957.

Prevalence and pattern of co-occurring musculoskeletal pain and its association with back-related disability among people with persistent low back pain: protocol for a systematic review and meta-analysis

BACKGROUND

Individuals with persistent low back pain commonly have a broad range of other health concerns including co-occurring musculoskeletal pain, which significantly affect their quality of life, symptom severity, and treatment outcomes. The purpose of this review is to get a better understanding of prevalence and patterns of co-occurring musculoskeletal pain complaints in those with persistent low back pain and its potential association with age, sex, and back-related disability as it might affect prognosis and management.

METHODS

This systematic review protocol has been designed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis Protocols. We will perform a comprehensive search, with no date limit, in the following bibliographic databases: MEDLINE and Embase (via Ovid), CINAHL, and Scopus for citation tracking, based on the following domains: back pain, co-occurring musculoskeletal pain, combined with a focus group that emphasizes study design. Appropriate papers will be screened against the eligibility criteria by three reviewers independently, data extracted by two independent author pairs and disagreement resolved by consensus meetings or other reviewers if required. Assessment of methodological quality and risk of bias will be conducted using a modified version of the Risk of Bias Tool for Prevalence Studies developed by Hoy and colleagues. The overall risk of bias will be determined for each included study based on the raters' consensus of the responses to the items in this tool. In case of sufficiently homogenous studies, meta-analysis will be performed.

DISCUSSION

Given the lack of standard terms used to define co-occurring musculoskeletal pain, the search strategy will include the broader term "back pain," different terms for the "other co-occurring pain," and specific study designs combined with several exclusion terms. The results of this proposed review will identify the prevalence and patterns of co-occurring musculoskeletal pain among those with persistent low back pain, which is likely to inform clinical management, research, and policy in management of musculoskeletal disorders.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO CRD42017068807.

Syphilis in the Americas: a protocol for a systematic review of syphilis prevalence and incidence in four high-risk groups, 1980-2016

BACKGROUND

Syphilis infection has recently resurfaced as a significant public health problem. Although there has been a tremendous amount of research on the epidemiology of syphilis, there has been limited work done to synthesize the extensive body of research and systematically estimate patterns of disease within high-risk groups in the Americas. The purpose of this systematic review and meta-analysis is to (1) summarize recent patterns of syphilis infection in North and South America among four high-risk groups (MSM, transgender women, sex workers, and incarcerated individuals) from 1980 to 2016, (2) identify and differentiate regional geographic epidemiologic characteristics, and (3) compare the epidemics of the economically developed countries of North America from the developing countries and public health systems of Latin America and the Caribbean.

METHODS/DESIGN

Primary studies reporting syphilis prevalence and/or incidence in at least one of the four high-risk groups will be identified from Medline/PubMed, Embase, Lilacs, SciELO, The Cochrane Library, Web of Science, Scopus, ProQuest, CINAHL, Clase, and Periódica, as well as "gray" literature sources (conference abstracts, country reports, etc.). Studies published from 1980 through 2016 will be included. Data will be extracted from studies meeting inclusion and exclusion criteria and a random effects meta-analysis of prevalence and incidence estimates will be conducted. Heterogeneity, risk of bias, and publication bias will be assessed. Pooled prevalence and incidence estimates will be calculated for comparisons based on geographic region, risk factors, and time period.

DISCUSSION

Our systematic review and meta-analysis aims to contribute to an improved understanding of global epidemiologic patterns of syphilis infection in most-at-risk populations. Through systematic classification of the existing literature, and comparison of disease patterns across regional, temporal and socio-behavioral differences, we hope to improve public health surveillance and improve efforts to control the spread of disease across the Americas.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO CRD42016047306.

Barriers and facilitators to the implementation of orthodontic mini-implants in clinical practice: a protocol for a systematic review and meta-analysis

BACKGROUND

Most orthodontic treatment plans need some form of anchorage to control the reciprocal forces of tooth movement. Orthodontic mini implants (OMIs) have been hailed for having revolutionized orthodontics, because they provide anchorage without depending on the collaboration of patients, they have a favorable effectiveness compared with conventional anchorage devices, and they can be used for a wide scale of treatment objectives. However, surveys have shown that many orthodontists never or rarely use them. To understand the rationale behind this knowledge-to-action gap, we will conduct a systematic review that will identify and quantify potential barriers and facilitators to the implementation of OMIs in clinical practice for all potential stakeholders, i.e., patients, family members, clinicians, office staff, clinic owners, policy makers, etc. The prevalence of clinicians that do not use OMIs will be our secondary outcome.

METHODS

The Preferred Reporting Items for Systematic review and Meta-Analysis Protocols (PRISMA-P) 2015 Statement was adopted as the framework for reporting this manuscript. We will apply broad-spectrum search strategies and will search MEDLINE and more than 40 other databases. We will conduct searches in the gray literature, screen reference lists, and hand-search 12 journals. All study designs, stakeholders, interventions, settings, and languages will be eligible. We will search studies that report on barriers or facilitators to the implementation of orthodontic mini implants (OMIs) in clinical practice. Implementation constructs and their prevalence among pertinent stakeholders will be our primary outcomes. All searching and data extraction procedures will be conducted by three experienced reviewers. We will also contact authors and investigators to obtain additional information on data items and unidentified studies. Risk of bias will be scored with tools designed for the specific study designs. We will assess heterogeneity, meta-biases, and the robustness of the overall evidence of outcomes. We will present findings in a systematic narrative synthesis and plan meta-analyses when pertinent criteria are met.

DISCUSSION

Knowledge creation on this research topic could identify and quantify both expected and unexpected implementation constructs and their stakeholders. Such knowledge can help develop strategies to address implementation issues and redirect future studies on OMIs towards knowledge translation. This could lead to improved patient-health experiences and a reduction in research waste.