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26-12-2015

Developmental Trajectories of Boys’ Driven Exercise and Fasting During the Middle School Years

Auteurs: Heather A. Davis, Leila Guller, Gregory T. Smith

Gepubliceerd in: Research on Child and Adolescent Psychopathology | Uitgave 7/2016

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Abstract

Boys appear to engage in eating disorder behavior, particularly nonpurging compensatory behaviors such as driven exercise and fasting, at higher rates than previously thought. Little is known about the development of these behaviors in adolescent boys. In a sample of 631 non-binge eating and non-purging boys studied once in 5th grade and 6 times over the 3 years of middle school (grades 6 through 8), we found that (a) for some youth, driven exercise and fasting were present from grade 6; (b) different boys progressed along different trajectories of engagement in driven exercise and fasting, with some boys engaging in no driven exercise or fasting (65.8 % and 83.5 %, respectively), some boys engaging in driven exercise and fasting throughout middle school (25.2 % and 16.5 %, respectively), and other boys discontinuing engagement in driven exercise (9 %); (c) 5th grade depression, eating expectancies, and thinness expectancies predicted subsequent trajectory group membership; and (d) boys engaging in driven exercise and fasting in 8th grade remained distressed. Boys’ engagement in driven exercise and fasting behavior merits the attention of researchers and clinicians.
Voetnoten
1
It is not yet clear why boys are more likely to engage in nonpurging compensatory behaviors rather than purging behaviors, such as self-induced vomiting and laxative use. Although important, this question was not addressed in the current study.
 
2
There are additional risk factors we could have studied. For example, this longitudinal data set did not include collection of body mass index (BMI), which might have been a useful predictor of driven exercise or fasting trajectories. Although BMI did not discriminate between adolescents who did and did not engage in nonpurging compensatory behavior in prior research (Stiles-Shields et al. 2012; Wade and O'Shea 2015), that prior sample included only 35 boys, and we could not replicate that finding in this larger sample. In addition, the current data set did not include the complete Eating Disorder Examination Questionnaire, so we could not assess if the scales of that measure add to the predictive power of depression, eating expectancies, and thinness expectancies.
 
3
All participants were invited to participate at each wave, even if they did not participate in the wave prior. For example, this includes Wave 0, in which 3 % of consenting participants were absent or otherwise unable to participate in that wave. These participants were still invited to participate in future waves of the study.
 
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Metagegevens
Titel
Developmental Trajectories of Boys’ Driven Exercise and Fasting During the Middle School Years
Auteurs
Heather A. Davis
Leila Guller
Gregory T. Smith
Publicatiedatum
26-12-2015
Uitgeverij
Springer US
Gepubliceerd in
Research on Child and Adolescent Psychopathology / Uitgave 7/2016
Print ISSN: 2730-7166
Elektronisch ISSN: 2730-7174
DOI
https://doi.org/10.1007/s10802-015-0119-3

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