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Int J Obes (Lond). 2019 Jul;43(7):1325-1333. doi: 10.1038/s41366-018-0280-1. Epub 2018 Dec 13.

Overweight and obesity in preschool aged children and risk of mental health service utilization.

Carsley S1,2,3, Tu K1,4,5, Parkin PC1,2,6, Pullenayegum E2, Birken CS7,8,9.

Author information

1
Institute for Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.
2
Child Health Evaluative Sciences, Peter Gilgan Centre for Research and Learning, the Hospital for Sick Children, Toronto, Canada.
3
Institute for Clinical Evaluative Sciences, Toronto, Canada.
4
Department of Family and Community Medicine, University of Toronto, Toronto, Canada.
5
Toronto Western Hospital Family Health Team, University Health Network, Toronto, Canada.
6
Division of Pediatric Medicine and the Pediatric Outcomes Research Team (PORT), Department of Pediatrics, University of Toronto Faculty of Medicine, Toronto, Canada.
7
Institute for Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada. catherine.birken@sickkids.ca.
8
Child Health Evaluative Sciences, Peter Gilgan Centre for Research and Learning, the Hospital for Sick Children, Toronto, Canada. catherine.birken@sickkids.ca.
9
Division of Pediatric Medicine and the Pediatric Outcomes Research Team (PORT), Department of Pediatrics, University of Toronto Faculty of Medicine, Toronto, Canada. catherine.birken@sickkids.ca.

Abstract

OBJECTIVE:

To determine if overweight or obesity in preschool-age children is associated with mental health service utilization in later childhood.

SUBJECTS:

Overall, 10,522 children 2 to <5 years, with no previous history of mental health service utilization, were identified from primary care electronic medical records (EMRs) across Ontario, Canada.

METHODS:

This was a retrospective longitudinal cohort study. Height and weight data were extracted and body mass index z-scores (zBMI) were calculated using the World Health Organization Growth Standards. Mental health service utilization, between ages 5 and <19, was defined using administrative billing codes for mental health outpatient visits, emergency department visits, and hospitalizations. A multivariable Cox proportional hazards model was performed.

RESULTS:

In total, 74.9% of children were healthy weight (zBMI between -2 and ≤1), 18.8% of children were at risk of overweight (zBMI between 1 and ≤2), 4.9% were overweight (zBMI > 2 and ≤3), and 1.5% had obesity (zBMI > 3). The median follow-up time was 2.2 years (IQR 1.0-4.2). The overall incidence rate of mental health service use was 44.5 events per 1000 person-years. The hazard ratio for girls with obesity was 2.73 (95% CI 1.62-4.60; p < 0.001) compared to girls with healthy weight. Compared to boys with healthy weight, boys 'at risk of overweight' and overweight were 1.22 (95% CI 1.03-1.44; p = 0.02) and 1.43 (95% CI 1.09-1.87; p = 0.01) times at higher risk of an incident mental health visit.

CONCLUSION:

Our study shows an association between weight status in preschool school aged children and higher incidence of mental health service use in later childhood. This relationship was strongest in girls. Future research is needed to understand this relationship by mental health diagnosis, sex, and age.

PMID:
30546134
DOI:
10.1038/s41366-018-0280-1

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