Prevalence (%) of behaviour problems at 5 years of age in relation to ear discharge, hearing difficulty, sex, and socioeconomic status
| Extreme antisocial behaviour (n) | Extreme neurotic behaviour (n) | Hyperactivity (n) | Poor conduct (n) | |
|---|---|---|---|---|
| Ear discharge up to age 5 | ||||
| Never | 9.4 (1051) | 9.5 (1055) | 9.9 (1098) | 9.6 (1066) |
| Ever | 13.1 (190) | 13.0 (188) | 13.6 (196) | 12.6 (182) |
| Hearing difficulty up to age 5 | ||||
| Never | 9.6 (1107) | 9.6 (1107) | 9.9 (1137) | 9.7 (1115) |
| Ever | 13.0 (137) | 13.9 (147) | 14.4 (151) | 12.8 (135) |
| Sex | ||||
| Male | 13.0 (883) | 8.9 (605) | 11.3 (765) | 13.0 (883) |
| Female | 6.7 (423) | 11.1 (701) | 9.4 (589) | 6.7 (426) |
| Socioeconomic status of household | ||||
| 1 (most advantaged) | 4.0 (109) | 9.2 (251) | 6.5 (178) | 5.3 (144) |
| 2 (average) | 8.9 (616) | 9.4 (646) | 9.7 (664) | 8.9 (616) |
| 3 (most disadvantaged) | 16.6 (580) | 11.6 (406) | 14.8 (512) | 15.8 (549) |
All comparisons are significant, p < 0.01.