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Table 1 Birth incidence rates of cystic fibrosis in Brittany by 5-year period (period 1975-2009).

From: Evidence for decline in the incidence of cystic fibrosis: a 35-year observational study in Brittany, France

Period No. patients No. births Incidence (95% CI) (1/xxxx) Incidence (95% CI) (/10,000)
1975-1979 93 184407 1/1983 (1/2413; 1/1629) 5.0 (4.1; 6.1)
1980-1984 80 189746 1/2372 (1/3880; 1/1450) 4.2 (2.6; 6.9)
1985-1989 82 179446 1/2188 (1/3573; 1/1340) 4.6 (2.8; 7.4)
1990-1994 56 169926 1/3034 (1/5123; 1/1797) 3.3 (2.0; 5.5)
1995-1999 56 174412 1/3115 (1/5258; 1/1845) 3.2 (1.9; 5.4)
2000-2004 58 186054 1/3208 (1/5396; 1/1907) 3.1 (1.9; 5.2)
2005-2009 58 189563 1/3268 (1/5498; 1/1943) 3.1 (1.8; 5.1)