Document Detail

Epidemiology of multiple sclerosis in south-western Sardinia.
MedLine Citation:
PMID:  21652610     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Sardinia is a known high-risk area for multiple sclerosis (MS), but no data for south-western Sardinia (SWS) are available. SWS has a genetically homogeneous population, apart from St Peter Island, and represents a peculiar environment related to the industrial, mineralogical and military economy.
OBJECTIVE: To estimate prevalence and incidence and to evaluate temporal trends and geographical distribution of MS in SWS.
METHODS: MS prevalence was evaluated on 31 December 2007 and crude mean annual incidence rate was defined between 2003 and 2007. Temporal trend in MS incidence was assessed using the Armitage test. To identify MS clusters, Standard Morbidity Ratio (SMR) was calculated for each village and geographical distribution prevalence by means of a Bayesian hierarchical model.
RESULTS: Total crude prevalence rate was 210.4 (95% CI 186.3-234.5): 280.3 (95% CI 241.4-319.3) for females, 138 (95% CI 110.1-165.8) for males. The crude mean annual incidence rate was 9.7/100,000 (95% CI 3.4-13.2): 4.7/100,000 (95% CI 2.4-17.0) and 14.6/100,000 (95% CI 11.8-34.8) for males and females respectively. MS incidence has increased over the last 50 years. Cluster analysis showed an SMR of 0.2 (95% CI 0.05-0.68, p = 0.002) on the island of San Pietro, and 2.0 (95% CI 1.35-2.95, p = 0.001) in Domusnovas. Spatial distribution of MS was confirmed by Bayesian geographical analysis.
CONCLUSIONS: Our data confirm Sardinia as a high-risk area for MS and support the relevance of genetic factors in MS, as evidenced in St Peter Island. However, we found an unexpectedly high MS prevalence in one village, in particular in males, suggesting an environmental influence on MS occurrence.
Eleonora Cocco; Claudia Sardu; Rita Massa; Elena Mamusa; Luigina Musu; Paola Ferrigno; Maurizio Melis; Cristina Montomoli; Virginia Ferretti; Giancarlo Coghe; Giuseppe Fenu; Jessica Frau; Lorena Lorefice; Nicola Carboni; Paolo Contu; Maria G Marrosu
Publication Detail:
Type:  Journal Article     Date:  2011-06-07
Journal Detail:
Title:  Multiple sclerosis (Houndmills, Basingstoke, England)     Volume:  17     ISSN:  1477-0970     ISO Abbreviation:  Mult. Scler.     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-07     Completed Date:  2012-03-01     Revised Date:  2014-07-30    
Medline Journal Info:
Nlm Unique ID:  9509185     Medline TA:  Mult Scler     Country:  England    
Other Details:
Languages:  eng     Pagination:  1282-9     Citation Subset:  IM    
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MeSH Terms
Age Factors
Bayes Theorem
Child, Preschool
Cluster Analysis
Gene-Environment Interaction
Genetic Predisposition to Disease
Infant, Newborn
Italy / epidemiology
Middle Aged
Multiple Sclerosis / epidemiology*,  genetics
Residence Characteristics
Risk Assessment
Risk Factors
Sex Factors
Time Factors
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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