Early-life maternal attachment and risky health behaviours in adolescence: findings from the United Kingdom Millennium Cohort Study

Table 2| Odds ratios of MRBs by lower MA adjusted for explanatory models

Model	Multiple risky behaviours by lower maternal attachment		Proportion attenuated (%)
Model	OR	95% CI	Proportion attenuated (%)
Baseline	1.23*	1.00–1.50*	Reference
1: Low attachment mechanisms	1.20	0.98–1.47	13%
2: Maternal depression	1.17	0.95–1.44	26%
3: Poor adolescent mental health	1.19	0.97–1.45	17%
4: Social inequalities	1.19	0.98–1.45	17%
5: Fully adjusted	1.16	0.95–1.41	30%

Footnote: * = p < .05, OR = Odds Ratio, 95% CI = 95% Confidence Intervals. Baseline model = unadjusted univariate analysis between MA (maternal attachment) and MRBs (multiple risky behaviours); Model 1 (low attachment mechanisms at 9 months) = adjusted for multiple births + unplanned pregnancy + infant prematurity + breastfeeding + maternal age at birth + infant sex; Model 2 (maternal depression) = adjusted for maternal depression at 9 months + infant sex; Model 3 (poor adolescent mental health) = adjusted for poor adolescent mental health at 14 + infant sex; Model 4 (social inequalities at 9 months) = adjusted for single parent status + socioeconomic circumstance by maternal education + household income + infant sex and Model 5 was fully adjusted for all risk factors. Proportion attenuated calculated by the formula: (100 x (Baseline model OR – Adjusted OR) / (Baseline model OR – 1)). Total number of complete case observations was 7796. Sensitivity analysis results presented in Additional file 1 – List of Appendices, Appendix Table 6

ISSN: 1471-2458