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 |