Area | Year |
Rate per 100000 | 95% CI |
Diagnostic criteria |
Valle d'Aosta8 | 1985 | 38.4 | 28–51 | a |
Pordenone22 | 1987 | 51.5 | 34–75 | b |
Reggio Emilia and Modena9 | 1990 | 39.4 | 34–46 | c |
Ferrara6 | 1981 | 46.1 | 40–53 | b |
Ferrara11 | 1993 | 68.3 | 60–77 | a |
San Marino23 | 1982 | 51.6 | 26–92 | b |
Macerata24 | 1988 | 37.5 | 31–45 | a |
Ascoli Piceno24 | 1988 | 42.8 | 36–50 | a |
Pescara25 | 1990 | 21.5 | 15–26 | a |
Chieti25 | 1990 | 22.0 | 17–27 | a |
Northwestern Sardinia10 | 1991 | 102.6 | 92–115 | a |
Caltanissetta7 | 1986 | 51.1 | 35–72 | a |
Monreale12 | 1991 | 72.4 | 43–113 | a |
Present study | 1996 | 53.0 | 45–62 | a |
a=Poser et al,14b=Allison and Millar,26 c=McAlpine et al.27