Table 2.
Unadjusted and adjusted associations of early injury with diagnosis of attention deficit hyperactivity disorder (ADHD)
| Relative risk (95% CI) of ADHD diagnosis before age 10 | Relative risk (95% CI) of ADHD diagnosis ever | Comparison | |
|---|---|---|---|
| Comparison group | |||
| Unadjusted | 1.0 (referent) | 1.0 (referent) | Referent |
| Adjusted* | 1.0 (referent) | 1.0 (referent) | Referent |
| Head injury group | |||
| Unadjusted | 2.0 (1.6 to 2.5) | 1.9 (1.5 to 2.4) | Referent |
| Adjusted* | 1.9 (1.5 to 2.5) | 1.8 (1.4 to 2.2) | Referent |
| Burn injury group | |||
| Unadjusted | 2.3 (1.6 to 3.1) | 2.0 (1.5 to 2.8) | Referent |
| Adjusted* | 1.7 (1.2 to 2.5) | 1.8 (1.3 to 2.5) | Referent |
*Adjusted for sex, prematurity, Townsend index, and practice identification number.