Table 2 Comparison of the 1985 and 2005 cohorts
1985 Cohort2005 Cohortp Value
Total identified with definite or probable disease (n)380620
Sex (women:men)2.2:12.4:1
Age at diagnosis (years)
    All37.136.60.52
    Women36.836.50.75
    Men37.937.00.52
Age at disease onset (years)
    All32.131.50.35
    Women31.131.00.94
    Men34.632.70.19
Age at prevalence day (years)
    All49.350.80.12
    Women48.350.30.09
    Men51.451.80.77
Disease duration at prevalence day (years)
    All16.7718.960.006
    Women16.818.90.03
    Men16.719.00.10