Table 3.

Risk Ratios for conduct problems by gender within ethnic group

	Conduct problems		*Fighting/Bullying		*Rule-breaking
	Unadjusted RR (95%CI)	Adjusted RR (95%CI)	Unadjusted RR (95%CI)	Adjusted RR (95%CI)	Unadjusted RR (95%CI)	Adjusted RR (95%CI)
Overall gender difference
Girl	0.83 (0.70–0.96)	0.81 (0.67–0.95)	1·02 (0·87–1·17)	1·02 (0·84–1·19)	0·89 (0·76–1·02)	0·85 (0·71–1·00)
Within ethnic group
Black African	0.98 (0.77–1.18)	0.98 (0.77–1.18)	0.97 (0.83–1.11)	0.97 (0.82–1.13)	0.98 (0.78–1.18)	0.97 (0.76–1.19)
Black Caribbean	0.99 (0.82–1.16)	1.01 (0.76–1.27)	0.86 (0.65–1.07)	0.87 (0.63–1.11)	0.83 (0.64–1.02)	0.80 (0.59–1.00)
Indian/Pakistani/Bangladeshi	1.31 (0.22–2.41)	1.76 (− 0.10–3.61)	0.93 (0.07–1.80)	0.89 (0.10–1.68)	0.78 (0.12–1.43)	0.74 (0.03–1.45)
Latin American	0.37 (0.11–0.63)	0.38 (0.12–0.64)	1.16 (0.62–1.69)	0.99 (0.52–1.45)	1.01 (0.51–1.50)	0.99 (0.52–1.45)
Mixed white and black	0.78 (0.54–1.02)	0.78 (0.54–1.02)	0.90 (0.55–1.26)	0.89 (0.53–1.26)	1.08 (0.81–1.36)	1.13 (0.76–1.49)
Other black	0.71 (0.21–1.21)	0.72 (0.23–1.21)	0.98 (0.61–1.34)	0.96 (0.58–1.33)	0.88 (0.59–1.16)	0.85 (0.50–1.20)
Other mixed/multiple	1.28 (0.62–1.95)	1.23 (0.53–1.93)	1.07 (0.60–1.54)	1.05 (0.52–1.58)	0.66 (0.47–0.86)	0.58 (0.41–0.76)
Other white	0.40 (0.11–0.68)	0.38 (0.10–0.65)	1.30 (0.78–1.81)	1.33 (0.81–1.85)	0.97 (0.81–1.13)	0.94 (0.74–1.15)
Other/unknown	0.94 (0.26–1.62)	0.93 (0.27–1.58)	0.98 (0.45–1.52)	1.01 (0.42–1.59)	0.85 (0.47–1.22)	0.82 (0.39–1.24)
White British	0.80 (0.35–1.26)	0.77 (0.27–1.26)	1.02 (0.75–1.29)	1.02 (0.76–1.28)	0.70 (0.52–0.87)	0.66 (0.46–0.86)

RR Risk ratio, 95%CI 95% Confidence Interval

For gender comparisons, boys are used as the reference. For ethnic comparisons, the overall sample prevalence is used as the reference

Adjusted for clustering by school, year group, and free school meal

*Administered at 10 of 12 schools, total sample (n = 3535)