A prospective study of psychological predictors of body fat gain among children at high risk for adult obesity

Abstract

Objective: Limited data suggest that psychological factors, including binge eating, dieting, and depressive symptoms, may predispose children to excessive weight gain. We investigated the relationship between baseline psychological measures and changes in body fat (measured with dual-energy x-ray absorptiometry) over time among children thought to be at high risk for adult obesity.

Methods: A cohort study of a convenience sample of children (age: 6-12 years) recruited from Washington, DC, and its suburbs was performed. Subjects were selected to be at increased risk for adult obesity, either because they were overweight when first examined or because their parents were overweight. Children completed questionnaires at baseline that assessed dieting, binge eating, disordered eating attitudes, and depressive symptoms; they underwent measurements of body fat mass at baseline and annually for an average of 4.2 years (SD: 1.8 years).

Results: Five hundred sixty-eight measurements were obtained between July 1996 and December 2004, for 146 children. Both binge eating and dieting predicted increases in body fat. Neither depressive symptoms nor disturbed eating attitudes served as significant predictors. Children who reported binge eating gained, on average, 15% more fat mass, compared with children who did not report binge eating.

Conclusions: Children's reports of binge eating and dieting were salient predictors of gains in fat mass during middle childhood among children at high risk for adult obesity. Interventions targeting disordered eating behaviors may be useful in preventing excessive fat gain in this high-risk group.

FIGURE 1

Associations between baseline psychological factors and changes in body fat mass over time. Fat mass values were logarithmically transformed for analysis. For disordered eating attitudes (A) and depressive symptoms (B), each subject’s partial residual was added to mean fat mass before retransformation to conventional units. For dieting attempts (C) and binge eating (D), retransformed least-squares means for fat mass are shown.