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Table 2 Results of the time trend analysis: odds-ratio (OR) and average percent change (APC) associated with each 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 Incidence (1/xxxx) Incidence (/10,000) OR (95% CI) eβ APC (95% CI) (eβ-1)*100 p
1975-1979 1/1983 5.0 ref. ref. -
1980-1984 1/2372 4.2 0.84 (0.63; 1.12) -16.4% (-37.4%; 11.6%) 0.2243
1985-1989 1/2188 4.6 0.91 (0.68; 1.21) -9.4% (-32.0%; 20.7%) 0.5007
1990-1994 1/3034 3.3 0.65 (0.47; 0.90) -34.7% (-52.6%; -10.0%) 0.0093
1995-1999 1/3115 3.2 0.64 (0.46; 0.88) -36.3% (-53.8%; -12.3%) 0.0058
2000-2004 1/3208 3.1 0.62 (0.45; 0.85) -38.2% (-55.0%; -15.1%) 0.0029
2005-2009 1/3268 3.1 0.61 (0.44; 0.83) -39.3% (-55.8%; -16.7%) 0.0020