From: Age within schoolyear and attention-deficit hyperactivity disorder in Scotland and Wales
Scotland* | Wales ** | |||||
---|---|---|---|---|---|---|
Month of birth | N | ADHD N (%) | Month of birth | N | ADHD N (%) | |
1 (oldest) | Mar-May | 186,002 | 1,450 (0.78) | Sept-Nov | 76,944 | 684 (0.89) |
2 | June-Aug | 191,822 | 1,637 (0.85) | Dec-Feb | 74,430 | 730 (0.98) |
3 | Sept-Nov | 184,751 | 1,609 (0.87) | Mar-May | 75,655 | 737 (0.97) |
4 (youngest) | Dec-Feb | 136,750 | 1,107 (0.81) | June-Aug | 76,552 | 767 (1.00) |