Multiple sclerosis and birth order.

Multiple sclerosis and birth order.

Studies on the birth order of patients with multiple sclerosis have yielded contradictory conclusions. Most of the sets of data, however, have been tested by biased tests. Data that have been submitted to unbiased tests seem to suggest that cases are more likely to occur in early birth ranks. This should be tested on further samples and some comments are offered on how this should be done.

Multiple sclerosis and birth order: a longitudinal cohort study.

BACKGROUND Genetic epidemiological studies suggest both genetic and environmental factors have a role in multiple sclerosis (MS). Environmental effects are strongly suggested from geographical gradients, migration data, and discordance rates in twins. In epidemiological studies, risk of MS in offspring of small families and in those with an early birth-order position has been reported and inter...

Month of Birth and the Incidence of Multiple Sclerosis in Southern Iran

Birth cohort effects in multiple sclerosis.

PURPOSE To identify potential birth cohort effects in multiple sclerosis in Sweden and particularly in Stockholm county. METHODS Data on multiple causes of death from multiple sclerosis during 1962 to 1995 in Sweden and 1968 to 1995 in Stockholm county were analyzed using age-period-cohort models and curvature. RESULTS Mortality from multiple sclerosis was higher in Sweden than in Stockholm...

بررسی subscale های scl90-r در بیماری multiple sclerosis

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