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JOURNAL ARTICLE
META-ANALYSIS
Smoking as a risk factor for developing Multiple Sclerosis: A meta-analysis of observational studies.
La Clinica Terapeutica 2016 May
OBJECTIVE: The aim of this study was to improve and update the pool of available studies included in the previous meta-analyses, and to provide further evidence about smoking as a risk factor for MS.
MATERIAL AND METHODS: PubMed and Scopus searches were undertaken to identify studies investigating the association between cigarette smoking and MS. Odds ratio (OR), relative risk (RR) together with 95% confidence intervals (CIs) were calculated for case-control and cohort studies and prevalence rate for cross sectional.
RESULTS: 33 studies were suitable for the meta-analysis. The summary OR for case control studies (ever versus never) was 1.40 (95% CI, 1.29 to 1.52) and 1.42 (1.26-1.60) for current vs. no-smokers.
CONCLUSIONS: Smoking is associated with MS risk. Research using animal models can help to fully understand the mechanisms behind the association.
MATERIAL AND METHODS: PubMed and Scopus searches were undertaken to identify studies investigating the association between cigarette smoking and MS. Odds ratio (OR), relative risk (RR) together with 95% confidence intervals (CIs) were calculated for case-control and cohort studies and prevalence rate for cross sectional.
RESULTS: 33 studies were suitable for the meta-analysis. The summary OR for case control studies (ever versus never) was 1.40 (95% CI, 1.29 to 1.52) and 1.42 (1.26-1.60) for current vs. no-smokers.
CONCLUSIONS: Smoking is associated with MS risk. Research using animal models can help to fully understand the mechanisms behind the association.
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