A systematic review of the incidence and prevalence of comorbidity in multiple sclerosis: Overview

Background: Comorbidity is an area of increasing interest in multiple sclerosis (MS). Objective: The objective of this review is to estimate the incidence and prevalence of comorbidity in people with MS and assess the quality of included studies. Methods: We searched the PubMed, SCOPUS, EMBASE and W...

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Published in:Multiple sclerosis Vol. 21; no. 3; pp. 263 - 281
Main Authors: Marrie, Ruth Ann, Cohen, Jeffrey, Stuve, Olaf, Trojano, Maria, Sørensen, Per Soelberg, Reingold, Stephen, Cutter, Gary, Reider, Nadia
Format: Journal Article
Language:English
Published: London, England SAGE Publications 01.03.2015
Sage Publications Ltd
Subjects:
Comorbidity
Humans
Incidence
Multiple Sclerosis - epidemiology
Prevalence
Systematic Review
prevalence
Multiple sclerosis
comorbidity
systematic review
incidence
ISSN:1352-4585, 1477-0970, 1477-0970
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Abstract Background: Comorbidity is an area of increasing interest in multiple sclerosis (MS). Objective: The objective of this review is to estimate the incidence and prevalence of comorbidity in people with MS and assess the quality of included studies. Methods: We searched the PubMed, SCOPUS, EMBASE and Web of Knowledge databases, conference proceedings, and reference lists of retrieved articles. Two reviewers independently screened abstracts. One reviewer abstracted data using a standardized form and the abstraction was verified by a second reviewer. We assessed study quality using a standardized approach. We quantitatively assessed population-based studies using the I2 statistic, and conducted random-effects meta-analyses. Results: We included 249 articles. Study designs were variable with respect to source populations, case definitions, methods of ascertainment and approaches to reporting findings. Prevalence was reported more frequently than incidence; estimates for prevalence and incidence varied substantially for all conditions. Heterogeneity was high. Conclusion: This review highlights substantial gaps in the epidemiological knowledge of comorbidity in MS worldwide. Little is known about comorbidity in Central or South America, Asia or Africa. Findings in North America and Europe are inconsistent. Future studies should report age-, sex- and ethnicity-specific estimates of incidence and prevalence, and standardize findings to a common population.
AbstractList Comorbidity is an area of increasing interest in multiple sclerosis (MS). The objective of this review is to estimate the incidence and prevalence of comorbidity in people with MS and assess the quality of included studies. We searched the PubMed, SCOPUS, EMBASE and Web of Knowledge databases, conference proceedings, and reference lists of retrieved articles. Two reviewers independently screened abstracts. One reviewer abstracted data using a standardized form and the abstraction was verified by a second reviewer. We assessed study quality using a standardized approach. We quantitatively assessed population-based studies using the I² statistic, and conducted random-effects meta-analyses. We included 249 articles. Study designs were variable with respect to source populations, case definitions, methods of ascertainment and approaches to reporting findings. Prevalence was reported more frequently than incidence; estimates for prevalence and incidence varied substantially for all conditions. Heterogeneity was high. This review highlights substantial gaps in the epidemiological knowledge of comorbidity in MS worldwide. Little is known about comorbidity in Central or South America, Asia or Africa. Findings in North America and Europe are inconsistent. Future studies should report age-, sex- and ethnicity-specific estimates of incidence and prevalence, and standardize findings to a common population.
BACKGROUND: Comorbidity is an area of increasing interest in multiple sclerosis (MS). OBJECTIVE: The objective of this review is to estimate the incidence and prevalence of comorbidity in people with MS and assess the quality of included studies. METHODS: We searched the PubMed, SCOPUS, EMBASE and Web of Knowledge databases, conference proceedings, and reference lists of retrieved articles. Two reviewers independently screened abstracts. One reviewer abstracted data using a standardized form and the abstraction was verified by a second reviewer. We assessed study quality using a standardized approach. We quantitatively assessed population-based studies using the I 2 statistic, and conducted random-effects meta-analyses. RESULTS: We included 249 articles. Study designs were variable with respect to source populations, case definitions, methods of ascertainment and approaches to reporting findings. Prevalence was reported more frequently than incidence; estimates for prevalence and incidence varied substantially for all conditions. Heterogeneity was high. CONCLUSION: This review highlights substantial gaps in the epidemiological knowledge of comorbidity in MS worldwide. Little is known about comorbidity in Central or South America, Asia or Africa. Findings in North America and Europe are inconsistent. Future studies should report age-, sex- and ethnicity-specific estimates of incidence and prevalence, and standardize findings to a common population.
Comorbidity is an area of increasing interest in multiple sclerosis (MS).BACKGROUNDComorbidity is an area of increasing interest in multiple sclerosis (MS).The objective of this review is to estimate the incidence and prevalence of comorbidity in people with MS and assess the quality of included studies.OBJECTIVEThe objective of this review is to estimate the incidence and prevalence of comorbidity in people with MS and assess the quality of included studies.We searched the PubMed, SCOPUS, EMBASE and Web of Knowledge databases, conference proceedings, and reference lists of retrieved articles. Two reviewers independently screened abstracts. One reviewer abstracted data using a standardized form and the abstraction was verified by a second reviewer. We assessed study quality using a standardized approach. We quantitatively assessed population-based studies using the I² statistic, and conducted random-effects meta-analyses.METHODSWe searched the PubMed, SCOPUS, EMBASE and Web of Knowledge databases, conference proceedings, and reference lists of retrieved articles. Two reviewers independently screened abstracts. One reviewer abstracted data using a standardized form and the abstraction was verified by a second reviewer. We assessed study quality using a standardized approach. We quantitatively assessed population-based studies using the I² statistic, and conducted random-effects meta-analyses.We included 249 articles. Study designs were variable with respect to source populations, case definitions, methods of ascertainment and approaches to reporting findings. Prevalence was reported more frequently than incidence; estimates for prevalence and incidence varied substantially for all conditions. Heterogeneity was high.RESULTSWe included 249 articles. Study designs were variable with respect to source populations, case definitions, methods of ascertainment and approaches to reporting findings. Prevalence was reported more frequently than incidence; estimates for prevalence and incidence varied substantially for all conditions. Heterogeneity was high.This review highlights substantial gaps in the epidemiological knowledge of comorbidity in MS worldwide. Little is known about comorbidity in Central or South America, Asia or Africa. Findings in North America and Europe are inconsistent. Future studies should report age-, sex- and ethnicity-specific estimates of incidence and prevalence, and standardize findings to a common population.CONCLUSIONThis review highlights substantial gaps in the epidemiological knowledge of comorbidity in MS worldwide. Little is known about comorbidity in Central or South America, Asia or Africa. Findings in North America and Europe are inconsistent. Future studies should report age-, sex- and ethnicity-specific estimates of incidence and prevalence, and standardize findings to a common population.
Background: Comorbidity is an area of increasing interest in multiple sclerosis (MS). Objective: The objective of this review is to estimate the incidence and prevalence of comorbidity in people with MS and assess the quality of included studies. Methods: We searched the PubMed, SCOPUS, EMBASE and Web of Knowledge databases, conference proceedings, and reference lists of retrieved articles. Two reviewers independently screened abstracts. One reviewer abstracted data using a standardized form and the abstraction was verified by a second reviewer. We assessed study quality using a standardized approach. We quantitatively assessed population-based studies using the I2 statistic, and conducted random-effects meta-analyses. Results: We included 249 articles. Study designs were variable with respect to source populations, case definitions, methods of ascertainment and approaches to reporting findings. Prevalence was reported more frequently than incidence; estimates for prevalence and incidence varied substantially for all conditions. Heterogeneity was high. Conclusion: This review highlights substantial gaps in the epidemiological knowledge of comorbidity in MS worldwide. Little is known about comorbidity in Central or South America, Asia or Africa. Findings in North America and Europe are inconsistent. Future studies should report age-, sex- and ethnicity-specific estimates of incidence and prevalence, and standardize findings to a common population.
Author Cutter, Gary
Trojano, Maria
Marrie, Ruth Ann
Reingold, Stephen
Stuve, Olaf
Sørensen, Per Soelberg
Reider, Nadia
Cohen, Jeffrey
Author_xml – sequence: 1
  givenname: Ruth Ann
  surname: Marrie
  fullname: Marrie, Ruth Ann
  email: rmarrie@hsc.mb.ca
  organization: Department of Internal Medicine, University of Manitoba, Canada/Department of Community Health Sciences, University of Manitoba, Health Sciences Center, Canada
– sequence: 2
  givenname: Jeffrey
  surname: Cohen
  fullname: Cohen, Jeffrey
  organization: Mellen Center for MS Treatment and Research, Cleveland Clinic, USA
– sequence: 3
  givenname: Olaf
  surname: Stuve
  fullname: Stuve, Olaf
  organization: Department of Neurology and Neurotherapeutics, University of Texas Southwestern, USA
– sequence: 4
  givenname: Maria
  surname: Trojano
  fullname: Trojano, Maria
  organization: Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari, Italy
– sequence: 5
  givenname: Per Soelberg
  surname: Sørensen
  fullname: Sørensen, Per Soelberg
  organization: Department of Neurology, Copenhagen University Hospital Rigshospitalet, Denmark
– sequence: 6
  givenname: Stephen
  surname: Reingold
  fullname: Reingold, Stephen
  organization: Scientific and Clinical Review Associates, LLC, USA
– sequence: 7
  givenname: Gary
  surname: Cutter
  fullname: Cutter, Gary
  organization: Department of Biostatistics, University of Alabama at Birmingham, USA
– sequence: 8
  givenname: Nadia
  surname: Reider
  fullname: Reider, Nadia
  organization: Department of Internal Medicine, University of Manitoba, Canada
BackLink https://www.ncbi.nlm.nih.gov/pubmed/25623244$$D View this record in MEDLINE/PubMed
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Issue 3
Keywords prevalence
Multiple sclerosis
comorbidity
systematic review
incidence
Language English
License This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 License (http://www.creativecommons.org/licenses/by-nc/3.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page(http://www.uk.sagepub.com/aboutus/openaccess.htm).
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PublicationTitle Multiple sclerosis
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Snippet Background: Comorbidity is an area of increasing interest in multiple sclerosis (MS). Objective: The objective of this review is to estimate the incidence and...
Comorbidity is an area of increasing interest in multiple sclerosis (MS). The objective of this review is to estimate the incidence and prevalence of...
BACKGROUND: Comorbidity is an area of increasing interest in multiple sclerosis (MS). OBJECTIVE: The objective of this review is to estimate the incidence and...
Comorbidity is an area of increasing interest in multiple sclerosis (MS).BACKGROUNDComorbidity is an area of increasing interest in multiple sclerosis (MS).The...
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SubjectTerms Comorbidity
Humans
Incidence
Multiple Sclerosis - epidemiology
Prevalence
Systematic Review
Title A systematic review of the incidence and prevalence of comorbidity in multiple sclerosis: Overview
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