Table 3

IRRs for association between hyperactivity and CPs at age 5 and subsequent hospital admissions or A&E attendances for injury between ages 9 and 14 years

UnadjustedAdjusted (model 1)*Adjusted (model 2)†
IRR (95% CI)P valueIRR (95% CI)P valueIRR (95% CI)P value
Hyperactivity
 Normal111
 Borderline1.34 (1.01 to 1.77)0.0401.21 (0.92 to 1.59)0.1691.16 (0.88 to 1.52)0.299
 High1.10 (0.91 to 1.34)0.3210.98 (0.81 to 1.19)0.8370.92 (0.74 to 1.14)0.435
CPs
 Normal111
 Borderline1.38 (1.16 to 1.65)<0.0011.31 (1.09 to 1.59)0.0031.31 (1.10 to 1.57)0.003
 High1.26 (1.02 to 1.56)0.0291.12 (0.90 to 1.39)0.3071.12 (0.89 to 1.42)0.326
  • *Model 1: Adjusted for child’s sex, number of people in household, lone parent, residential area, household poverty, maternal education, physical activity level, maternal age at child’s birth and country of the respondents.

  • †Model 2: Adjusted for child’s sex, number of people in household, lone parent, residential area, household poverty, maternal education, physical activity level, maternal age at child’s birth, country of the respondents, CP (in case of hyperactivity) and hyperactivity (in case of CP).

  • A&E, Accident & Emergency; CP, conduct problem; IRR, incidence rate ratio .