Increasing prevalence and incidence of multiple sclerosis in Poland.

Abstract Epidemiologic data on multiple sclerosis (MS) in Poland are limited. Our objectives were to assess a mean annual incidence rate, and MS prevalence on December 31, 2015 in the Swietokrzyskie province (central Poland). We analyzed data of 1525 patients, collected in the Polish Multiple Sclerosis Registry. On December 31, 2015, overall crude prevalence of MS was not less than 121.3/100,000 (95% CI, 114.6–128.4). Significantly higher prevalence was recorded in females (167.1; 95% CI, 155.6–179.1) than in males (73.2; 95% CI, 64.2–82.6; P