Seasonal patterns in optic neuritis and multiple sclerosis: a meta-analysis.
J Neurol Sci
; 181(1-2): 56-64, 2000 Dec 01.
Article
en En
| MEDLINE
| ID: mdl-11099713
To quantify and characterize seasonal variation in monosymptomatic optic neuritis (MON) onsets, multiple sclerosis (MS) onsets and MS exacerbations (MSE), a meta-analysis was performed, using established methods and pooling weighted information obtained from nine reports on MON, six reports on MS onsets and nine reports on MSE, which fulfilled specific criteria for report quality and data homogeneity. The results suggested that MON, MS onsets and MSE in the Northern hemisphere present a similar pattern with highest frequencies in spring and lowest in winter. These differences were highest for MS onsets, 45% with 95% CI 36-55%, and lowest for MSE, 10% with 95% CI 7-13%, statistically significant and robust, insensitive to an alternative seasonal definition, not unduly influenced by any single primary study, and supported by fail-safe N calculations. Random variation, misclassification and publication bias were less likely to account for the reported generalized seasonal patterns.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Estaciones del Año
/
Neuritis Óptica
/
Esclerosis Múltiple
Tipo de estudio:
Etiology_studies
/
Systematic_reviews
Límite:
Humans
Idioma:
En
Revista:
J Neurol Sci
Año:
2000
Tipo del documento:
Article
País de afiliación:
Suecia
Pais de publicación:
Países Bajos