The global prevalence of familial multiple sclerosis: an updated systematic review and meta-analysis

2021 ◽  
Author(s):  
Naeim Ehtesham ◽  
Maryam Zare Rafie ◽  
Meysam Mosallaei
Keyword(s):  
Multiple Sclerosis ◽  
Web Of Science ◽  
Meta Analysis ◽  
Disease Onset ◽  
Inclusion Criteria ◽  
Multifactorial Diseases ◽  
Pooled Prevalence ◽  
Significant Difference ◽  
Meta Regression ◽  
Genetic And Environmental Factors

Abstract Background: Considering that familial multiple sclerosis (FMS) can reveal the extent to which genetic and environmental factors each involve in the etiopathogenesis of the disease, we performed an updated meta-analysis of the worldwide prevalence of FMS by addition of recent publications. Methods: A search in PubMed, Scopus, the ISI Web of Science, and Google Scholar up to 20 December 2020 was done. The inclusion criteria were based on the CoCoPop approach (condition, context, and population). The qualified studies entered the process of the meta-analysis by using comprehensive meta-analysis ver. 2 software.Results: The pooled prevalence of MS in relatives of 16179 FMS cases was estimated to be 11.8% (95% CI: 10.7-13) based on a random-effects model. The pooled mean age of disease onset in adult probands was calculated to be 28.7 years (95% CI: 27.2± 30.2). In 13 studies that reported the data of FMS in pediatrics (n=6636) and adults (n=877), the FMS prevalence was 10.8% (95% CI: 8.1-14.2) and 15.5% (95% CI: 13.8-17.4), respectively. Considering the data of 9 studies, the prevalence of FMS in males (n=5243) and females (n=11503) patients was calculated to be 13.7% (95% CI: 10.1-18.2) and 15.4% (95% CI: 10.3-22.4), respectively. The odds ratio of male/female in FMS cases was not statistically significant (OR= 0.9; 95% CI: 0.6-1.2, P=0.55). Subgroup analysis demonstrated a significant difference in the prevalence of FMS between the geographical areas (P= 0.007). The meta-regression model for FMS prevalence was significantly lower in terms of higher latitude (P< 0.001) and increased MS prevalence (P< 0.001). In contrast, meta-regression based on prevalence day was not statistically significant (P=0.29).Conclusions: The prevalence of FMS is more in the pediatric group than that of adults, is distinct between geographical areas, and diminishes with the increment of MS prevalence and latitude. Also, the symptoms initiate relatively at lower ages in FMS cases. By contrast with multifactorial diseases, our analysis unveiled that the prevalence of FMS was not more prevalent in men than women and the risk of MS development in relatives was not more when the affected proband was male.

scholarly journals The global prevalence of familial multiple sclerosis: an updated systematic review and meta-analysis

BMC Neurology ◽  
2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Naeim Ehtesham ◽  
Maryam Zare Rafie ◽  
Meysam Mosallaei
Keyword(s):  
Multiple Sclerosis ◽  
Web Of Science ◽  
Meta Analysis ◽  
Disease Onset ◽  
Random Effects Model ◽  
Inclusion Criteria ◽  
Isi Web Of Science ◽  
Pooled Prevalence ◽  
Significant Difference ◽  
Meta Regression

Abstract Background Considering that many recent studies have reported the prevalence of familial multiple sclerosis (FMS), we performed an updated meta-analysis of the worldwide prevalence of FMS by the addition of recent publications. Methods A search in PubMed, Scopus, the ISI Web of Science, and Google Scholar was undertaken up to 20 December 2020. The inclusion criteria were based on the CoCoPop approach (condition, context, and population). Meta-analysis of the qualified studies was conducted by comprehensive meta-analysis ver. 2 software. Results The pooled prevalence of MS in relatives of 16,179 FMS cases was estimated to be 11.8% (95% CI: 10.7–13) based on a random-effects model. The pooled mean age of disease onset in adult probands was calculated to be 28.7 years (95% CI: 27.2 ± 30.2). Regarding 13 studies that reported the data of FMS in pediatrics (n = 877) and adults (n = 6636), the FMS prevalence in pediatrics and adults was 15.5% (95% CI: 13.8–17.4) and 10.8% (95% CI: 8.1–14.2), respectively. The prevalence of FMS in affected males (n = 5243) and females (n = 11,503) was calculated to be 13.7% (95% CI: 10.1–18.2) and 15.4% (95% CI: 10.3–22.4), respectively. The odds ratio of male/female in FMS cases was not statistically significant (OR = 0.9; 95% CI: 0.6–1.2, P = 0.55). Subgroup analysis demonstrated a significant difference in the prevalence of FMS between the geographical areas (P = 0.007). The meta-regression model indicated that the prevalence of FMS is lower with higher latitude and higher MS prevalence (P < 0.001). In contrast, meta-regression based on prevalence day was not statistically significant (P = 0.29). Conclusions The prevalence of FMS is higher in the pediatric group than that of adults, distinct between geographical areas, and diminishes with the increment of MS prevalence and latitude. Also, the symptoms initiate relatively at younger ages in the FMS cases. Interestingly, our analysis unveiled that FMS is not more prevalent in men than women and the risk of MS development in relatives is not higher when the affected proband is male.

scholarly journals The prevalence of paramagnetic rim lesions in multiple sclerosis: A systematic review and meta-analysis

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0256845
Author(s):  
Koy Chong Ng Kee Kwong ◽  
Daisy Mollison ◽  
Rozanna Meijboom ◽  
Elizabeth N. York ◽  
Agniete Kampaite ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Systematic Review ◽  
Subgroup Analysis ◽  
Meta Analysis ◽  
Patient Level ◽  
Pooled Prevalence ◽  
Significant Difference ◽  
Disability Status ◽  
Lesion Level ◽  
Meta Regression

Background Recent findings from several studies have shown that paramagnetic rim lesions identified using susceptibility-based MRI could represent potential diagnostic and prognostic biomarkers in multiple sclerosis (MS). Here, we perform a systematic review and meta-analysis of the existing literature to assess their pooled prevalence at lesion-level and patient-level. Methods Both database searching (PubMed and Embase) and handsearching were conducted to identify studies allowing the lesion-level and/or patient-level prevalence of rim lesions or chronic active lesions to be calculated. Pooled prevalence was estimated using the DerSimonian-Laird random-effects model. Subgroup analysis and meta-regression were performed to explore possible sources of heterogeneity. PROSPERO registration: CRD42020192282. Results 29 studies comprising 1230 patients were eligible for analysis. Meta-analysis estimated pooled prevalences of 9.8% (95% CI: 6.6–14.2) and 40.6% (95% CI: 26.2–56.8) for rim lesions at lesion-level and patient-level, respectively. Pooled lesion-level and patient-level prevalences for chronic active lesions were 12.0% (95% CI: 9.0–15.8) and 64.8% (95% CI: 54.3–74.0), respectively. Considerable heterogeneity was observed across studies (I2>75%). Subgroup analysis revealed a significant difference in patient-level prevalence between studies conducted at 3T and 7T (p = 0.0312). Meta-regression analyses also showed significant differences in lesion-level prevalence with respect to age (p = 0.0018, R2 = 0.20) and disease duration (p = 0.0018, R2 = 0.48). Other moderator analyses demonstrated no significant differences according to MRI sequence, gender and expanded disability status scale (EDSS). Conclusion In this study, we show that paramagnetic rim lesions may be present in an important proportion of MS patients, notwithstanding significant variation in their assessment across studies. In view of their possible clinical relevance, we believe that clear guidelines should be introduced to standardise their assessment across research centres to in turn facilitate future analyses.

scholarly journals Prevalence of Invasive Streptococcus pneumoniae Infections among Iranian Children: A Systematic Review and Meta-Analysis

2021 ◽  
Author(s):  
Arshid Yousefi Avarvand ◽  
Mehrdad Halaji ◽  
Donya Zare ◽  
Meysam Hasannejad-Bibalan ◽  
Hadi Sedigh Ebrahim-Saraie
Keyword(s):  
Systematic Review ◽  
Streptococcus Pneumoniae ◽  
Web Of Science ◽  
Data Extraction ◽  
Meta Analysis ◽  
Single Center ◽  
Inclusion Criteria ◽  
Pooled Prevalence ◽  
Iranian Children ◽  
The Web

Background: Streptococcus pneumoniae is an important pathogen of children, mostly in developing countries. We aimed to investigate the prevalence of invasive S. pneumoniae among Iranian children using a systematic review and meta-analysis. Methods: A systematic search was carried out to identify papers published by Iranian authors in the Web of Science, PubMed, Scopus, and Google Scholar electronic databases from January of 2010 to December of 2017. Then, seven publications that met our inclusion criteria were selected for data extraction and analysis. Results: Totally, one study was multicenter, and six were single-center based studies. Meanwhile, all of the included studied performed among hospitalized patients. Seven studies reported the prevalence of invasive S. pneumoniae isolated from children, of these the pooled prevalence of S. pneumoniae was 2.5% (95% CI: 0.7%-9.1%). Conclusion: The overall prevalence of invasive S. pneumoniae infections among Iranian children is low (2.5%). However, further clinical studies are required to elucidate the burden of infections among Iranian children, especially in eastern regions.

The value of TI-RADS combined with superb micro-vascular imagine in distinguishing benign and malignant thyroid nodules:a meta-analysis

2020 ◽  
Author(s):  
Cong Wang ◽  
Xiukun Hou
Keyword(s):  
Operating Characteristic ◽  
Thyroid Nodules ◽  
Web Of Science ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Summary Statistics ◽  
Inclusion Criteria ◽  
High Diagnostic Accuracy ◽  
Significant Difference ◽  
Benign Nodules

Abstract This meta-analysis aimed to evaluate the value of thyroid imaging report and data system (TI-RADS) combined with superb micro-vascular imagine technique(SMI) in distinguishing benign and malignant thyroid nodules. We searched PubMed, Web of Science, Google Scholar, Cochrane Library, EBSCO, and CBM databases from inception through January 1st, 2015 without language restrictions. Meta-analysis was conducted using STATA version 14.0 and Meta-Disc version 1.4 softwares. We calculated the summary statistics for sensitivity(Sen), specificity(Spe), and receiver operating characteristic (SROC) curve. Six studies that met all inclusion criteria were included in this meta-analysis. A total of 408 thyroid malignant nodules and 496 thyroid benign nodules were assessed. All thyroid nodules were histologically confirmed after SMI. The pooled Sen and Spe of TI-RADS were 0.80(95%CI=0.71-0.87) and 0.82(95%CI=0.75-0.87); The pooled Sen and Spe of TI-RADS combined with SMI were 0.88 (95%CI=0.80-0.91) and 0.89 (95%CI=0.85-0.92). The areas under the SROC curve of TI-RADS and TI-RADS combined with SMI were 0.8874(SE=0.0165) and 0.9415(SE=0.0102), between which there was significant difference(Z=2.789; SE=0.0194; p =0.0053). Our meta-analysis indicates that TI-RADS combined with SMI may have high diagnostic accuracy, and is more effective than single TI-RADS in distinguishing benign and malignant thyroid nodules.

scholarly journals Prevalence of sexual dysfunction in men with multiple sclerosis: a systematic review and meta-analysis

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Maryam Dastoorpoor ◽  
Maryam Zamanian ◽  
Rahmatollah Moradzadeh ◽  
Seyed Massood Nabavi ◽  
Raana Kousari
Keyword(s):  
Multiple Sclerosis ◽  
Sexual Dysfunction ◽  
Web Of Science ◽  
Meta Analysis ◽  
Random Effects Model ◽  
Keywords Multiple Sclerosis ◽  
Inverse Variance ◽  
Pooled Prevalence ◽  
Different Types ◽  
High Range

Abstract Background Symptoms in multiple sclerosis (MS) can lead to different types and ranges of sexual dysfunction in MS patients. Studies in different parts of the world have reported a high range of sexual dysfunction in men with MS. This study aimed to estimate pooled prevalence of sexual dysfunction in men with MS. Methods The authors searched Web of Science, PubMed, Scopus, Embase, Magiran, SID, and Iran Medical Papers Database using the keywords “multiple sclerosis”, “sexual dysfunctions”, “men”, “prevalence”, and their synonyms systematically. Meta-analysis was performed using the random effects model with inverse variance-weighted method to estimate the overall prevalence of sexual dysfunction in men with MS. The protocol for this meta-analysis is available in PROSPERO (ID CRD42020199005). Results A total of 351 documents were identified, and 20 articles published from 1996 to 2019 were analyzed. The articles used sample sizes from 9 to 101 individuals. However, two studies conducted online used 388 and 1568 samples. Prevalence of sexual dysfunction in all studies was reported from 31 to 92%, and the pooled prevalence of sexual dysfunction in men with MS in all studies was 62.9% with a 95% confidence interval 53 to 72.7% (heterogeneity: I2 = 96.3%, Q-statistic = 12.48, P value < 0.001). According to the results of Egger’s test, there was publication bias in the current study (β = 4.55, Se = 1.38, P value = 0.004). Conclusion Sexual dysfunction is highly prevalent in men with MS. Diagnosing sexual dysfunction in MS patients in clinics by specialists have to be considered a necessity.

scholarly journals Effect of Exercise on Fatigue in Multiple Sclerosis Patients: A Network Meta-analysis

2021 ◽  
Author(s):  
Yuting Chen ◽  
Shanshan Xu ◽  
Jiran Shen ◽  
Hui Yang ◽  
Wei Xu ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Web Of Science ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Control Group ◽  
Inclusion Criteria ◽  
Randomized Controlled ◽  
Different Types ◽  
Multiple Sclerosis Patients ◽  
Better Than

AbstractFew studies have directly compared the effects of different exercise therapies on reducing fatigue in patients with multiple sclerosis. Thus, we conducted a Frequentist network meta-analysis to analyze and compare the effectiveness of different types of exercise on reducing multiple sclerosis-related fatigue. Relevant randomized controlled trials were searched in PubMed, Web of Science and Cochrane Library databases from the date of their inception up to April 1, 2021. In total, 27 articles involving 1470 participants and 10 types of interventions met the inclusion criteria. The results indicated that aquatic exercise ranked as the most effective among these interventions, and aerobic exercise had small-to-moderate effect sizes. Most of the interventions were shown to be better than the control group, except for climbing. Climbing was the only intervention that ranked worse than the controls. All of these findings merit further investigation in future clinical trials.

scholarly journals Prevalence of dysphagia in patients with multiple sclerosis; a systematic review and meta-analysis

2021 ◽  
Author(s):  
Omid Mirmosayyeb ◽  
Narges Ebrahimi ◽  
Arman Shekarian ◽  
Sara Bagherieh ◽  
Alireza Afshari-Safavi ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Systematic Review ◽  
Literature Search ◽  
Web Of Science ◽  
Meta Analysis ◽  
Final Analysis ◽  
Self Report ◽  
Pooled Prevalence ◽  
Screening Strategies ◽  
Conference Papers

Objectives: Dysphagia is a major comorbidity observed in patients with multiple sclerosis, yet different prevalence rates are reported for it. Therefore, we have designed this systematic review to estimate the pooled prevalence of dysphagia in patients with MS. Method: We searched PubMed, Scopus, EMBASE, Web of Science, and gray literature including references from the identified studies, reviews studies, and conference abstracts which were published up to February 2021. Articles that were relevant to our topic and could provide information regarding the prevalence of dysphagia among MS patients were included; however, articles with self-report screening strategies were excluded. Results: The literature search found 1993 articles. After eliminating duplicates, 1272 articles remained. Sixteen abstract conference papers were included for final analysis. A total of 10846 MS cases and 4913 MS patients with dysphagia included in the analysis. The pooled prevalence of dysphagia in the included studies was 45.3% (95% CI: [40.7%-50%]) Conclusion: The results of this systematic review shows that the prevalence of dysphagia in MS patients is 45% which is greatly higher compared to the general population.

scholarly journals Prevalence of Frailty in the Middle East: Systematic Review and Meta-Analysis

Healthcare ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 108
Author(s):  
Bader A. Alqahtani ◽  
Mohammed M. Alshehri ◽  
Ragab K. Elnaggar ◽  
Saad M. Alsaad ◽  
Ahmed A. Alsayer ◽  
...  
Keyword(s):  
Publication Bias ◽  
Web Of Science ◽  
Meta Analysis ◽  
Middle Eastern ◽  
Community Dwelling ◽  
Point Estimate ◽  
Inclusion Criteria ◽  
Pooled Prevalence ◽  
Regression Test ◽  
Community Dwelling Older Adults

(1) We aimed to systematically search available data on the prevalence of frailty among community-dwelling elders in Middle Eastern countries. The results from available studies are cumulated to provide comprehensive evidence for the prevalence of frailty. (2) Methods: A meta-analysis was done. A literature search was carried out using PRISMA guidelines in PubMed, Web of Science, and SCOPUS websites for studies up to 2020. Inclusion criteria entailed all primary studies conducted in Middle Eastern countries on frailty in community-dwelling older adults aged 60 years and older. (3) Results: A total of 10 studies were selected for this study. Random-effects meta-analysis of nine studies indicated there was a pooled prevalence rate of 0.3924 with a standard error of 0.037. This pooled prevalence point estimate of 0.3924 was statistically significant (p < 0.001). The Egger’s regression test and the trim-fill method for detecting publication bias did not detect any evidence of publication bias in the sample of included studies. The Egger’s regression test was not statistically significant. The trim-fill method indicated zero studies were missing on either side; (4) Conclusions: The study’s findings indicate that the prevalence of frailty is higher in Middle Eastern nations. Despite indications that many of these nations’ populations are rapidly ageing, we presently lack information on the incidence of frailty in these populations; this information is essential to health, policymakers, and social care planning.

scholarly journals Olfactory Dysfunction in Patients with Multiple Sclerosis; A Systematic Review and Meta-Analysis

2021 ◽  
Author(s):  
Omid Mirmosayyeb ◽  
Narges Ebrahimi ◽  
Mahdi Barzegar ◽  
Alireza Afshari-Safavi ◽  
Sara Bagherieh ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Systematic Review ◽  
Web Of Science ◽  
Meta Analysis ◽  
Final Analysis ◽  
Olfactory Dysfunction ◽  
Control Group ◽  
Healthy Individuals ◽  
Pooled Prevalence ◽  
Conference Papers

Objectives: Olfactory dysfunction is a major comorbidity observed in patients with multiple sclerosis, yet different prevalence rates are reported for it. Therefore, we have designed this systematic review to estimate the pooled prevalence of olfactory dysfunction in patients with MS. To our knowledge, this is the first systematic review and meta-analysis on the prevalence of olfactory dysfunction in MS patients. Method: We searched PubMed, Scopus, EMBASE, Web of Science, ProQuest, and gray literature including references from the identified studies, review studies, and conference abstracts which were published up to January 2021. Articles that were relevant to our topic and could provide information regarding the prevalence of olfactory dysfunction, or the scores of smell threshold, discrimination, or identification (TDI scores) among MS patients and healthy individuals were included; however, articles published before 1990 and after the end of 2020 were excluded. Results: The literature search found 1630 articles. After eliminating duplicates, 897 articles remained. two abstract conference papers were included for final analysis. A total of 1099 MS cases and 299 MS patients with olfactory dysfunction were included in the analysis. The pooled prevalence of olfactory dysfunction in the included studies was 27.2%. (95% CI: [19.7%, 35.4%]) Also, the overall TDI score in MS patients was lower than that in the control group (SMD=-1.00; 95% CI: [-1.44, -0.56]), and the level of Threshold (SMD= -0.47; 95% CI: [-0.75, -0.19]), Discrimination (SMD=-0.53; 95% CI: [-0.96, -0.10]), and Identification (SMD=-1.02; 95% CI: [-1.36, -0.68]) per se were lower in MS compared with control respectively. Conclusion: The results of this systematic review shows that the prevalence of olfactory dysfunction in MS patients is high and more attention needs to be drawn to this aspect of MS.

scholarly journals Distribution, Prevalence, and Causative Agents of Fungal Keratitis: A Systematic Review and Meta-Analysis (1990 to 2020)

2021 ◽  
Vol 11 ◽  
Author(s):  
Kazem Ahmadikia ◽  
Sanaz Aghaei Gharehbolagh ◽  
Bahareh Fallah ◽  
Mahsa Naeimi Eshkaleti ◽  
Pooneh Malekifar ◽  
...  
Keyword(s):  
Web Of Science ◽  
Geographical Origin ◽  
Meta Analysis ◽  
Distinct Species ◽  
Fungal Keratitis ◽  
Inclusion Criteria ◽  
Pooled Prevalence ◽  
Common Causes ◽  
Causative Agents ◽  
Patient Groups

ObjectivesThis study aims to provide an overview of the prevalence, distribution, and causative agents of fungal keratitis.MethodsAll the articles with data on the prevalence of fungal keratitis among various patient groups from January 1, 1990 to May 27, 2020 were retrieved through a systematic search in PubMed, Scopus, Web of Science, and Google Scholar. Data were extracted, and the pooled estimated prevalence of fungal keratitis, yeast/mold infection, the spectrum and frequency of various causative agents, and the pooled estimated prevalence of mixed infections were calculated in general and in various countries (wherever possible) using meta-analysis.ResultsFrom 11,235 articles retrieved in the primary search step, 169 met the inclusion criteria. The 169 eligible articles were divided into six groups and analyzed separately. The pooled prevalence of fungal keratitis was variable with values ranging from 0.05% among postkeratoplasty patients to 43.01% among patients with a clinical suspicion of fungal keratitis. There was also a country-dependent variation in the prevalence (Paraguay: 50.1% (95% CI, 35.11, 65.00); Ireland: 1.1% (95% CI, 0.03, 6.04)). Except for postkeratoplasty cases (yeast: 51.80%), in all patient groups, molds were more common than yeasts. Although more than 50 distinct species of fungi have been found to cause fungal keratitis, Fusarium species followed by Aspergillus species were the most common causes of the disease. In general, 9.29% (95% CI, 6.52, 12.38) of fungal keratitis cases were mixed with bacterial agents.ConclusionThe prevalence of fungal keratitis can vary dramatically depending on the patient groups and geographical origin; however, the dominant causative agents are generally similar.

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