Table 1.
Characteristics of children aged under 2 years with head injury, those with burns and scalds, and comparison group. Values are numbers (percentages) unless stated otherwise
| Characteristic | Head injury (n=2782) | Burns (n=1116) | Comparison (n=58 190) |
|---|---|---|---|
| Median (interquartile range) follow-up time (years) | 12.4 (11.1-13.9) | 12.5 (11.1-13.9) | 12.5 (11.1-14.0) |
| Median (interquartile range) age at index injury (months) | 13.9 (9.0-18.4) | 14.8 (11.0-18.8) | NA |
| Males | 1520 (54.6) | 686 (61.5) | 29 718 (51.1) |
| Premature | 58 (2.1) | 15 (1.3) | 1 117 (1.9) |
| Townsend index*: | (n=2629) | (n=1052) | (n=55 786) |
| 1 (least deprived) | 665 (25.3) | 274 (26.1) | 15 431 (27.7) |
| 2 | 502 (19.1) | 188 (17.9) | 11 547 (20.7) |
| 3 | 537 (20.4) | 203 (19.3) | 11 209 (20.1) |
| 4 | 443 (16.9) | 189 (18.0) | 9 252 (16.6) |
| 5 (most deprived) | 421 (16.0) | 178 (16.9) | 7 017 (12.6) |
| Missing | 61 (2.3) | 20 (1.8) | 1 330 (2.4) |
| ADHD diagnosis: | |||
| <10 years old | 81 (2.9) | 32 (2.9) | 821 (1.4) |
| Ever | 88 (3.2) | 38 (3.4) | 967 (1.7) |
| ADHD prescription: | |||
| <10 years old | 33 (1.2) | 15 (1.3) | 377 (0.7) |
| Ever | 39 (1.4) | 21 (1.9) | 512 (0.9) |
| No of head injuries after age 2: | |||
| 1 | 418 (15.0) | 123 (11.0) | 4 502 (7.7) |
| 2 | 79 (2.8) | 21 (1.9) | 558 (1.0) |
| 3 | 12 (0.4) | 4 (0.4) | 74 (0.1) |
ADHD=attention deficit hyperactivity disorder; NA=not applicable.
*Townsend index not calculated when denominator for any variable in index is less than 20.