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Table 2 Incidence proportions in the study population by birth year

From: Geographic analysis of the variation in the incidence of ADHD in a country with free access to healthcare: a Danish cohort study

Birth cohort ADHD cases Births Incidence proportion (%) 95 % CI
1990 242 66,623 0.36 0.31; 0.41
1991 327 66,791 0.49 0.44; 0.55
1992 371 69,669 0.53 0.48; 0.59
1993 451 68,898 0.66 0.59; 0.72
1994 557 70,999 0.79 0.72; 0.85
1995 662 70,522 0.94 0.87; 1.01
1996 730 67,595 1.08 1.00; 1.61
1997 819 67,134 1.22 1.14; 1.31
1998 1028 65,092 1.58 1.49; 1.68
1999 1366 64,341 2.12 2.01; 2.24
2000 1665 64,630 2.58 2.46; 2.70