Objective To assess the prevalence of different trajectories of exposure to child poverty and their association with three indicators of adolescent physical and mental health in UK children.
Methods We analysed data on 10 652 children from a large, prospective, nationally representative sample in the UK Millennium Cohort Study. The outcomes were mental health, measured by the Strengths and Difficulties Questionnaire (SDQ), physical health, measured by obesity and any longstanding illness, at age 14. The exposure was relative poverty (<60% of median of equivalised household income), measured at 9 months, 3, 5, 7, 11 and 14 years. Poverty trajectories were characterised using latent class analysis. ORs and 95% CIs were estimated using multivariable logistic regression, adjusted for maternal education and ethnicity.
Results Four poverty trajectories were identified: never in poverty (62.4%), poverty in early childhood (13.4%), poverty in late childhood (5.0%) and persistent poverty (19.4%). Compared with children who never experienced poverty, those in persistent poverty were at increased risk of mental health problems (SDQ score≥17 (adjusted OR (aOR): 3.17; 95% CI: 2.40 to 4.19)), obesity (aOR: 1.57; 95% CI: 1.20 to 2.04) and longstanding illness (aOR: 1.98; 95% CI: 1.55 to 2.52). Poverty in early childhood was related to higher risk of obesity than that in late childhood, while the opposite is observed for mental health problems and longstanding illness.
Conclusions Persistent poverty affects one in five children in the UK. Any exposure to poverty was associated with worse physical and mental health outcomes. Policies that reduce child poverty and its consequences are likely to improve health in adolescence.
- child poverty
- mental health
- physical health
- longitudinal study
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Contributors ETCL and SW contributed equally, both wrote and conducted the analysis. ETCL, SW and DTR designed and conceptualised the study. CL, MW, BB and DT-R critically revised and contributed intellectually. All the authors reviewed and agreed on the final version of the manuscript.
Funding DTR and ETCL are funded by the MRC on a Clinician Scientist Fellowship (MR/P008577/1). SW is funded by a Wellcome Trust Society and Ethics Fellowship (200335/Z/15/Z). This work was also supported by the Farr Institute for Health Informatics Research (MR/M0501633/1).
Competing interests None declared.
Ethics approval The MCS was reviewed and approved by appropriate research ethics committees at each wave of data collection. This analysis did not require further ethics approval.
Provenance and peer review Not commissioned; externally peer reviewed.
Patient consent for publication Not required.
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