Prevalence estimates for MS in the United States and evidence of an increasing trend for women.

The purpose of this study was to provide current age-, sex-, and region-specific MS prevalence estimates and to identify trends using the National Health Interview Survey. The overall prevalence estimate was 85/100,000 population, or approximately 211,000 (+/-20,000) persons. A 50% increase was observed in the number of women reporting MS for 1991 through 1994 vs 1982 through 1986. The observed trend in higher numbers of self-reported MS among women is consistent with recent observations of higher prevalence and incidence.