Table 3.

Odds ratios for participation for GP^a-derived child measures (50 imputed datasets: n = 10 811)

		Child participation	P-value	Mother participation	P-value
Covariate		OR (95% CI)a		OR (95% CI)b
Asthma diagnosis before age 8	Yes vs no	8.71 (6.40, 11.83)	<0.001	8.99 (6.34, 12.74)	<0.001
Smoking record before age 18	Yes vs no	0.65 (0.56, 0.75)	<0.001	0.70 (0.60, 0.82)	<0.001
Depression before age 18	Yes vs no	0.79 (0.64, 0.97)	0.02	0.87 (0.70, 1.08)	0.2
BMIa	Per 1kg/m2	0.99 (0.98, 1.00)	0.09	0.99 (0.98, 1.00)	0.2
Consultation rate age 15-19	≤1 per year	1.00		1.00
	>1–4 per year	1.33 (1.15, 1.54)		1.04 (0.89, 1.22)
	>4 per year	1.60 (1.36, 1.89)	<0.001	1.12 (0.94, 1.33)	0.4
Drug count age 15-19	≤1 per year	1.00		1.00
	>1–4 per year	1.27 (1.12, 1.43)		1.04 (0.92, 1.19)
	>4 per year	1.40 (1.18, 1.65)	<0.001	1.07 (0.89, 1.29)	0.5

^aGP: general practitioner; BMI: body mass index.

^bAdjusted for baseline factors.