Detection of Cytomegalovirus Infection in Infants with Biliary Atresia: A Meta-analysis

Abstract Objectives Biliary atresia (BA) is the most common indication of liver transplantation in children. Several reports attributed BA to both prenatal and perinatal etiologies, including a viral infection-induced autoimmune response that targets the bile ducts. Cytomegalovirus (CMV) remains the most common virus being linked to BA. This meta-analysis aimed to estimate to what extent CMV infection is detected in patients with BA. Methods This study was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The databases of MEDLINE, Embase, Scopus, WHO-Virtual Health Library (VHL), ScienceDirect, and Google Scholar were used for the systematic search. The risk of bias was assessed using the Newcastle–Ottawa scale. Random effects model was used to estimate the pooled prevalence estimate with the corresponding 95% confidence interval (CI) using Comprehensive Meta-Analysis Software version 3.3. Results A total of 19 studies that fulfilled the eligibility criteria were included in the meta-analysis. The total number of infants with BA was 630 patients, and the pooled overall prevalence of CMV infection among them was 25.4% (95% CI: 15.9%–38.0%). There was high heterogeneity among studies (I2 = 85.1%, p < .001), and subgroup analyses showed significant regional differences (X2 = 48.9, p <.001). Data on the prognosis of CMV-associated BA were scarce and obtainable from few studies that suggested an association between detection of CMV infection and poor prognosis of BA. Conclusions The limited available data demonstrates that the rate of detection of CMV infection is high in infants with BA. There is still a need for large studies with appropriate controls for obtaining more reliable results about the various aspects of the association between CMV infection and BA.

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Detection of Cytomegalovirus infection in infants with biliary atresia: A meta-analysis

10.1101/2020.05.04.20090134 ◽

2020 ◽

Author(s):

Sagad Omer Obeid Mohamed ◽

Almigdad H. M. Ali ◽

Mohamed Elata Hassan Elbathani ◽

Osman Omer Ali Abdallah ◽

Assad Ahmed Mohammed Ahmed ◽

...

Keyword(s):

Biliary Atresia ◽

Meta Analysis ◽

Random Effects Model ◽

Regression Analyses ◽

Cmv Infection ◽

Eligibility Criteria ◽

Pooled Prevalence ◽

Meta Regression ◽

Meta Analyses ◽

End Stage

AbstractBackgroundBiliary atresia (BA) is a leading cause of end-stage liver disease and the most common indication of liver transplantation in children. Several reports attributed BA to both prenatal and perinatal aetiologies, including a viral infection-induced auto-immune response that targets the bile ducts. Cytomegalovirus (CMV) remains the most common virus being linked to BA. This meta-analysis estimates to what extent CMV infection is detected in patients with BA.MethodsThis study was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The databases of MEDLINE/PubMed, WHO-Virtual Health Library (VHL), ScienceDirect, and Google Scholar were used for the systematic search. Random effects model was used to estimate the pooled prevalence estimate with the corresponding 95% confidence interval (CI) using StatsDirect statistical software. Heterogeneity among the included studies was estimated using the I2 statistics. Publication bias was determined based on Begg’s test, Egger’s test, and examination of the funnel plot. Subgroup analyses and meta-regression were used to explore the moderators of heterogeneity between studies.ResultsA total of 13 studies that fulfilled the eligibility criteria were included in the meta-analysis. The pooled overall prevalence of CMV infection in patients with BA was 24.5% (95% CI 11.9 %– 33.9%). In subgroup and meta-regression analyses, the prevalence of CMV infection in patients with BA was correlated with the geographical areas (p = .001) but not with the study year (p = .153).ConclusionsThe available data demonstrate that the detection of CMV infection is common in infants with BA. There is still a need for large studies with appropriate controls to examine various aspects of the association between CMV infection and BA.AbbreviationsBA = biliary atresia, CMV = cytomegalovirus.

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388 Detection of Cytomegalovirus Infection in Infants with Biliary Atresia: A Meta-analysis

British Journal of Surgery ◽

10.1093/bjs/znab134.268 ◽

2021 ◽

Vol 108 (Supplement_2) ◽

Author(s):

A B E Elhassan ◽

S Mohamed ◽

A Ali ◽

M Elbathani ◽

O Abdallah ◽

...

Keyword(s):

Biliary Atresia ◽

Cytomegalovirus Infection ◽

Bile Ducts ◽

Meta Analysis ◽

Random Effects Model ◽

Cmv Infection ◽

Eligibility Criteria ◽

Statistical Software ◽

Pooled Prevalence ◽

Meta Analyses

Abstract Introduction Biliary atresia (BA) is the most common indication of liver transplantation in children. Several reports attributed BA to both prenatal and perinatal aetiologies, including a viral infection-induced auto-immune response that targets the bile ducts. Cytomegalovirus (CMV) remains the most common virus being linked to BA. This meta-analysis estimates to what extent CMV infection is detected in patients with BA. Method This study was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The databases of MEDLINE/PubMed, WHO-Virtual Health Library (VHL), ScienceDirect, and Google Scholar were used for the systematic search. Random effects model was used to estimate the pooled prevalence estimate with the corresponding 95% confidence interval (CI) using StatsDirect statistical software. Results A total of 13 studies (covering 419 patients) that fulfilled the eligibility criteria were included in the meta-analysis. The pooled overall prevalence of CMV infection in patients with BA was 24.5% (95% CI 11.9 %– 33.9%). Conclusions The available data demonstrate that the detection of CMV infection is common in infants with BA. There is still a need for large studies with appropriate controls to examine various aspects of the association between CMV infection and BA.

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Anosmia and dysgeusia in SARS-CoV-2 infection: incidence and effects on COVID-19 severity and mortality, and the possible pathobiology mechanisms - a systematic review and meta-analysis

F1000Research ◽

10.12688/f1000research.28393.1 ◽

2021 ◽

Vol 10 ◽

pp. 40

Author(s):

Endang Mutiawati ◽

Marhami Fahriani ◽

Sukamto S. Mamada ◽

Jonny Karunia Fajar ◽

Andri Frediansyah ◽

...

Keyword(s):

Web Of Science ◽

Respiratory Infections ◽

Meta Analysis ◽

Research Quality ◽

Future Studies ◽

Pooled Prevalence ◽

Protocol Registration ◽

Newcastle Ottawa Scale ◽

Meta Analyses ◽

Ottawa Scale

Background: The present study aimed to determine the global prevalence of anosmia and dysgeusia in coronavirus disease 2019 (COVID-19) patients and to assess their association with severity and mortality of COVID-19. Moreover, this study aimed to discuss the possible pathobiological mechanisms of anosmia and dysgeusia in COVID-19. Methods: Available articles from PubMed, Scopus, Web of Science, and preprint databases (MedRxiv, BioRxiv, and Researchsquare) were searched on November 10th, 2020. Data on the characteristics of the study (anosmia, dysgeusia, and COVID-19) were extracted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guideline. Newcastle–Ottawa scale was used to assess research quality. Moreover, the pooled prevalence of anosmia and dysgeusia were calculated, and the association between anosmia and dysgeusia in presence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was assessed using the Z test. Results: Out of 32,142 COVID-19 patients from 107 studies, anosmia was reported in 12,038 patients with a prevalence of 38.2% (95% CI: 36.5%, 47.2%); whereas, dysgeusia was reported in 11,337 patients out of 30,901 COVID-19 patients from 101 studies, with prevalence of 36.6% (95% CI: 35.2%, 45.2%), worldwide. Furthermore, the prevalence of anosmia was 10.2-fold higher (OR: 10.21; 95% CI: 6.53, 15.96, p < 0.001) and that of dysgeusia was 8.6-fold higher (OR: 8.61; 95% CI: 5.26, 14.11, p < 0.001) in COVID-19 patients compared to those with other respiratory infections or COVID-19 like illness. To date, no study has assessed the association of anosmia and dysgeusia with severity and mortality of COVID-19. Conclusion: Anosmia and dysgeusia are prevalent in COVID-19 patients compared to those with the other non-COVID-19 respiratory infections. Several possible mechanisms have been hypothesized; however, future studies are warranted to elucidate the definitive mechanisms of anosmia and dysgeusia in COVID-19. Protocol registration: PROSPERO CRD42020223204.

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Prevalence of Cognitive Impairment and Dementia in Older Adults Living at High Altitude: A Systematic Review and Meta-Analysis

Dementia and Geriatric Cognitive Disorders ◽

10.1159/000514471 ◽

2021 ◽

pp. 1-11

Author(s):

Diego Urrunaga-Pastor ◽

Diego Chambergo-Michilot ◽

Fernando M. Runzer-Colmenares ◽

Josmel Pacheco-Mendoza ◽

Vicente A. Benites-Zapata

Keyword(s):

Older Adults ◽

Cognitive Impairment ◽

High Altitude ◽

Web Of Science ◽

Meta Analysis ◽

Cross Sectional ◽

Language Restriction ◽

Newcastle Ottawa Scale ◽

Meta Analyses ◽

Ottawa Scale

Introduction: Dementia is a chronic disease with a variable prevalence throughout the world; however, this could be higher at high-altitude populations. We aimed to summarize the prevalence of cognitive impairment and dementia in older adults living at high altitude. Methods: We searched in PubMed, Medline, Scopus, Web of Science, and Embase and included the studies published from inception to July 20, 2020, with no language restriction, which reported the frequency of cognitive impairment or dementia in older adults living at high-altitude populations. Random-effects meta-analyses were performed to calculate the overall prevalence and 95% confidence intervals (95% CI) of cognitive impairment and dementia. The risk of bias was evaluated using the Newcastle-Ottawa Scale (NOS) adapted for cross-sectional studies. Results: Six studies were included (3,724 participants), and 5 of the 6 included studies were carried out in Latin America. The altitude ranged from 1,783 to 3,847 m, the proportion of women included varied from 38.7 to 65.6%, and the proportion of participants with elementary or illiterate educational level ranged from 71.7 to 97.6%. The overall prevalence of cognitive impairment was 22.0% (95% CI: 8–40, I2: 99%), and the overall prevalence of dementia was 11.0% (95% CI: 6–17, I2: 92%). In a subgroup analysis according to the instrument used to evaluate cognitive impairment, the prevalence of cognitive impairment was 21.0% (95% CI: 5–42, I2: 99%) in the MMSE group while the prevalence was 29.0% (95% CI: 0–78) in the non-MMSE group. Conclusions: The prevalence of cognitive impairment and dementia in older adults living at high altitude is almost twice the number reported in some world regions.

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The Prevalence of TET2 Gene Mutations in Patients with BCR-ABL-Negative Myeloproliferative Neoplasms (MPN): A Systematic Review and Meta-Analysis

Cancers ◽

10.3390/cancers13123078 ◽

2021 ◽

Vol 13 (12) ◽

pp. 3078

Author(s):

Yuh Cai Chia ◽

Md Asiful Islam ◽

Phil Hider ◽

Peng Yeong Woon ◽

Muhammad Farid Johan ◽

...

Keyword(s):

Regional Differences ◽

Myeloproliferative Neoplasms ◽

Meta Analysis ◽

Gene Mutations ◽

Screening Methods ◽

Eligibility Criteria ◽

Pooled Prevalence ◽

Critical Appraisal Tool ◽

Appraisal Tool

Multiple recurrent somatic mutations have recently been identified in association with myeloproliferative neoplasms (MPN). This meta-analysis aims to assess the pooled prevalence of TET2 gene mutations among patients with MPN. Six databases (PubMed, Scopus, ScienceDirect, Google Scholar, Web of Science and Embase) were searched for relevant studies from inception till September 2020, without language restrictions. The eligibility criteria included BCR-ABL-negative MPN adults with TET2 gene mutations. A random-effects model was used to estimate the pooled prevalence with 95% confidence intervals (CIs). Subgroup analyses explored results among different continents and countries, WHO diagnostic criteria, screening methods and types of MF. Quality assessment was undertaken using the Joanna Briggs Institute critical appraisal tool. The study was registered with PROSPERO (CRD42020212223). Thirty-five studies were included (n = 5121, 47.1% female). Overall, the pooled prevalence of TET2 gene mutations in MPN patients was 15.5% (95% CI: 12.1–19.0%, I2 = 94%). Regional differences explained a substantial amount of heterogeneity. The prevalence of TET2 gene mutations among the three subtypes PV, ET and MF were 16.8%, 9.8% and 15.7%, respectively. The quality of the included studies was determined to be moderate–high among 83% of the included studies. Among patients with BCR-ABL-negative MPN, the overall prevalence of TET2 gene mutations was 15.5%.

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Mothers’ utilization and associated factors of preconception care in Africa, a systematic review and meta-analysis

PLoS ONE ◽

10.1371/journal.pone.0254935 ◽

2021 ◽

Vol 16 (7) ◽

pp. e0254935

Author(s):

Tiwabwork Tekalign ◽

Tesfanesh Lemma ◽

Mulualem Silesh ◽

Eyasu Alem Lake ◽

Mistire Teshome ◽

...

Keyword(s):

Associated Factors ◽

Preconception Care ◽

Medical Condition ◽

Meta Analysis ◽

Maternal Health Services ◽

Care Utilization ◽

Adverse Health Effects ◽

Pooled Prevalence ◽

Newcastle Ottawa Scale ◽

Meta Analyses

Background As the studies show, in every minute in the world, 380 women become pregnant and 190 face unplanned or unwanted pregnancies; 110 experience pregnancy-related complications, and one woman dies from a pregnancy-related cause. Preconception care is one of the proven strategies for the reduction in mortality and decreases the risk of adverse health effects for the woman, fetus, and neonate by optimizing maternal health services and improves woman’s health. Therefore, this study aimed to estimate the pooled prevalence of utilization of preconception of care and associated factors in Africa. Methods Systematic search of published studies done on PubMed, EMBASE, MEDLINE, Cochrane, Scopus, Web of Science CINAHL, and manually on Google Scholar. This meta-analysis follows the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The quality of studies was assessed by the modified Newcastle-Ottawa Scale (NOS). Meta-analysis was carried out using a random-effects method using the STATA™ Version 14 software. Result From 249,301 obtained studies, 28 studies from 3 African regions involving 13067 women included in this Meta-analysis. The overall pooled prevalence of utilization of preconception care among pregnant women in Africa was found to be 18.72% (95% CI: 14.44, 23.00). Knowledge of preconception care (P = <0.001), preexisting medical condition (P = 0.045), and pregnancy intention (P = 0.016) were significantly associated with the utilization of preconception care. Conclusion The results of this meta-analysis indicated, as one of best approaches to improve birth outcomes, the utilization of preconception care is significantly low among mothers in Africa. Therefore, health care organizations should work on strategies to improve preconception care utilization.

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Diabetes as a risk factor for incident peripheral arterial disease in women compared to men: a systematic review and meta-analysis

Cardiovascular Diabetology ◽

10.1186/s12933-020-01130-4 ◽

2020 ◽

Vol 19 (1) ◽

Cited By ~ 1

Author(s):

Alyssa Z. Chase-Vilchez ◽

Isaac H. Y. Chan ◽

Sanne A. E. Peters ◽

Mark Woodward

Keyword(s):

Cardiovascular Disease ◽

Risk Factor ◽

Relative Risk ◽

Meta Analysis ◽

Arterial Disease ◽

Excess Risk ◽

Newcastle Ottawa Scale ◽

Peripheral Arterial ◽

Meta Analyses ◽

Ottawa Scale

Abstract Aims/hypothesis Previous meta-analyses have suggested that diabetes confers a greater excess risk of coronary heart disease, stroke, vascular dementia, and heart failure in women compared to men. While the underlying mechanism that explains such greater excess risk is unknown, in the current meta-analysis we hypothesized that we would find a similar sex difference in the relationship between diabetes and peripheral arterial disease (PAD). Methods PubMed MEDLINE, the Cochrane Database of Systematic Reviews, and Embase were systematically searched for prospective population-based cohort studies, with no restriction on publication date, language, or country. We included studies that reported the relative risk (RR), and its variability, for incident PAD associated with diabetes in both sexes. We excluded studies that did not adjust at least for age, and in which participants had pre-existing PAD. In cases where sex-specific results were not reported, study authors were contacted. Random-effects meta-analyses with inverse variance weighting were used to obtain summary sex-specific RRs and the women: men ratio of RRs for PAD. The Newcastle–Ottawa scale was used to assess study quality. Results Data from seven cohorts, totalling 2071,260 participants (49.8% women), were included. The relative risk for incident PAD associated with diabetes compared with no diabetes was 1.96 (95% CI 1.29–2.63) in women and 1.84 (95% CI 1.29–2.86) in men, after adjusting for potential confounders. The multiple-adjusted RR ratio was 1.05 (95% CI 0.90–1.22), with virtually no heterogeneity between studies (I2 = 0%). All studies scored 6–8, on the Newcastle–Ottawa scale of 0–9, indicating good quality. Eleven of the 12 studies that met review inclusion criteria did not report sex-specific relative risk, and these data were collected through direct correspondence with the study authors. Conclusion/interpretation Consistent with other studies, we found evidence that diabetes is an independent risk factor for PAD. However, in contrast to similar studies of other types of cardiovascular disease, we did not find evidence that diabetes confers a greater excess risk in women compared to men for PAD. More research is needed to explain this sex differential between PAD and other forms of CVD, in the sequelae of diabetes. In addition, we found that very few studies reported the sex-specific relative risk for the association between diabetes and PAD, adding to existing evidence for the need for improved reporting of sex-disaggregated results in cardiovascular disease research.

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A hidden pandemic? An umbrella review of global evidence on mental health in the time of COVID-19

10.31234/osf.io/bzpvw ◽

2022 ◽

Author(s):

Marlee Bower ◽

Scarlett Smout ◽

Amarina Donohoe-Bales ◽

Lily Teesson ◽

Eleisha Lauria ◽

...

Keyword(s):

Mental Health ◽

General Population ◽

Health Outcomes ◽

Systematic Reviews ◽

Meta Analysis ◽

Mental Health Outcomes ◽

Eligibility Criteria ◽

Pooled Prevalence ◽

Meta Review ◽

Meta Analyses

Introduction: Vast available international evidence has investigated the mental health impacts of the COVID-19 pandemic. This review aims to synthesise evidence, identifying populations and characteristics associated with poor mental health.Methods: A meta-review of pooled prevalence of anxiety and depression, with subgroup analyses for the general population, healthcare workers (HCW) and COVID-19 patients; and a meta-synthesis of systematic reviews to collate evidence on associated factors and further mental disorders. Databases searched included Scopus, Embase, PsycINFO, and MEDLINE dated to May 2021. Eligibility criteria included systematic reviews and/or meta-analyses, published post-November 2019, reporting data in English on mental health outcomes during the pandemic.Results: Eighty-one systematic reviews were included, 51 of which incorporated meta-analysis. Meta-review overall anxiety prevalence was 29% (95%CI: 27–31%, I2: 99.83%), with subgroup prevalence as 35% (95%CI: 23–47%, I2: 97.4%) in COVID-19 patients, 29% in HCW (95%CI: 25– 32, I2: 99.8%) and 28% in the general population (95%CI: 25–31%, I2: 99.9%). Meta-review overall depression prevalence was 28% (95%CI: 26–30%, I2: 99.7), with subgroup prevalence as 30% (95%CI: 7–60%, I2: 99.8%) in COVID-19 patients, 28% (95%CI: 25–31%, I2: 99.7%) in HCW and 27% (95%CI: 25–30, I2: 99.8%) in the general population. Meta-synthesis found many experienced psychological distress and PTSD/PTSS during COVID-19, but pooled prevalence ranged substantially. Fear of, proximity to, or confirmed COVID-19 infection; undergoing quarantine; and COVID-19-related news exposure were associated with adverse mental health outcomes. Amongst other factors, people who are younger, female, LGBTIQ, pregnant, parents or experiencing low social support, financial issues or socio-economic disadvantage, tended to have poorer mental health during the pandemic period.Conclusions: Despite high volumes of reviews, the diversity of findings and dearth of longitudinal studies within reviews means clear links between COVID-19 and mental health are not available, although existing evidence indicates probable associations.

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Epidemiology of placenta previa accreta: a systematic review and meta-analysis

BMJ Open ◽

10.1136/bmjopen-2019-031193 ◽

2019 ◽

Vol 9 (11) ◽

pp. e031193 ◽

Cited By ~ 9

Author(s):

Eric Jauniaux ◽

Lene Grønbeck ◽

Catey Bunce ◽

Jens Langhoff-Roos ◽

Sally L Collins

Keyword(s):

Systematic Review ◽

Placenta Previa ◽

Data Extraction ◽

Meta Analysis ◽

Eligibility Criteria ◽

Registration Number ◽

Newcastle Ottawa Scale ◽

Placenta Accreta Spectrum ◽

Obstetric Population ◽

Ottawa Scale

ObjectiveTo estimate the prevalence and incidence of placenta previa complicated by placenta accreta spectrum (PAS) and to examine the different criteria being used for the diagnosis.DesignSystematic review and meta-analysis.Data sourcesPubMed, Google Scholar, ClinicalTrials.gov and MEDLINE were searched between August 1982 and September 2018.Eligibility criteriaStudies reporting on placenta previa complicated by PAS diagnosed in a defined obstetric population.Data extraction and synthesisTwo independent reviewers performed the data extraction using a predefined protocol and assessed the risk of bias using the Newcastle-Ottawa scale for observational studies, with difference agreed by consensus. The primary outcomes were overall prevalence of placenta previa, incidence of PAS according to the type of placenta previa and the reported clinical outcomes, including the number of peripartum hysterectomies and direct maternal mortality. The secondary outcomes included the criteria used for the prenatal ultrasound diagnosis of placenta previa and the criteria used to diagnose and grade PAS at birth.ResultsA total of 258 articles were reviewed and 13 retrospective and 7 prospective studies were included in the analysis, which reported on 587 women with placenta previa and PAS. The meta-analysis indicated a significant (p<0.001) heterogeneity between study estimates for the prevalence of placenta previa, the prevalence of placenta previa with PAS and the incidence of PAS in the placenta previa cohort. The median prevalence of placenta previa was 0.56% (IQR 0.39–1.24) whereas the median prevalence of placenta previa with PAS was 0.07% (IQR 0.05–0.16). The incidence of PAS in women with a placenta previa was 11.10% (IQR 7.65–17.35).ConclusionsThe high heterogeneity in qualitative and diagnostic data between studies emphasises the need to implement standardised protocols for the diagnoses of both placenta previa and PAS, including the type of placenta previa and grade of villous invasiveness.PROSPERO registration numberCRD42017068589

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Auditory and visual hallucination prevalence in Parkinson's disease and dementia with Lewy bodies: a systematic review and meta-analysis

Psychological Medicine ◽

10.1017/s0033291718003161 ◽

2018 ◽

Vol 49 (14) ◽

pp. 2342-2353 ◽

Cited By ~ 4

Author(s):

Charlotte Louise Eversfield ◽

Llwyd David Orton

Keyword(s):

Systematic Review ◽

Parkinson’S Disease ◽

Parkinson's Disease ◽

Dementia With Lewy Bodies ◽

Meta Analysis ◽

Lewy Bodies ◽

Eligibility Criteria ◽

Pooled Prevalence ◽

Prevalence Estimates ◽

Meta Analyses

AbstractBackgroundNon-motor features of Parkinson's disease (PD) and dementia with Lewy bodies (DLB), such as auditory hallucinations (AH), contribute to disease burden but are not well understood.MethodsSystematic review and random-effects meta-analyses of studies reporting AH associated with PD or DLB. Prevalence of visual hallucinations (VH) in identified studies meeting eligibility criteria were included in meta-analyses, facilitating comparison with AH. Synthesis of qualitative descriptions of AH was performed. PubMed, Web of Science and Scopus databases were searched for primary journal articles, written in English, published from 1970 to 2017. Studies reporting AH prevalence in PD or DLB were screened using PRISMA methods.ResultsSearches identified 4542 unique studies for consideration, of which, 26 met inclusion criteria. AH pooled prevalence in PD was estimated to be 8.9% [95% confidence interval (CI) 5.3–14.5], while in DLB was estimated to be 30.8% (±23.4 to 39.3). Verbal hallucinations, perceived as originating outside the head, were the most common form of AH. Non-verbal AH were also common while musical AH were rare. VH were more prevalent, with an estimated pooled prevalence in PD of 28.2% (±19.1 to 39.5), while in DLB they were estimated to be 61.8% (±49.1 to 73.0). Meta-regression determined that the use of validated methodologies to identify hallucinations produced higher prevalence estimates.ConclusionsAH and VH present in a substantial proportion of PD and DLB cases, with VH reported more frequently in both conditions. Both AH and VH are more prevalent in DLB than PD. There is a need for standardised use of validated methods to detect and monitor hallucinations.

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