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Investigating direct links between depression, emotional control, and physical punishment with adolescent drive for thinness and bulimic behaviours, including possible moderation by the serotonin transporter 5-HTTLPR polymorphism

Rozenblat, Vanja, Ryan, Joanne, Wertheim, Eleanor H, King, Ross, Olsson, Craig A and Krug, Isabel 2017, Investigating direct links between depression, emotional control, and physical punishment with adolescent drive for thinness and bulimic behaviours, including possible moderation by the serotonin transporter 5-HTTLPR polymorphism, Frontiers in psychology, vol. 8, pp. 1-9, doi: 10.3389/fpsyg.2017.01361.

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Title Investigating direct links between depression, emotional control, and physical punishment with adolescent drive for thinness and bulimic behaviours, including possible moderation by the serotonin transporter 5-HTTLPR polymorphism
Author(s) Rozenblat, Vanja
Ryan, Joanne
Wertheim, Eleanor H
King, RossORCID iD for King, Ross orcid.org/0000-0002-0819-7077
Olsson, Craig AORCID iD for Olsson, Craig A orcid.org/0000-0002-5927-2014
Krug, Isabel
Journal name Frontiers in psychology
Volume number 8
Article ID 1361
Start page 1
End page 9
Total pages 9
Publisher Frontiers Media
Place of publication Lausanne, Switzerland
Publication date 2017-08
ISSN 1664-1078
Keyword(s) 5-HTTLPR
gene–environment interactions
disordered eating
parental physical punishment
depression
emotional control
social sciences
psychology
eating disorder
Summary Objectives: To examine the relationship between psychological and social factors (depression, emotional control, sexual abuse, and parental physical punishment) and adolescent drive for Thinness and Bulimic behaviors in a large community sample, and to investigate possible genetic moderation.

Method: Data were drawn from the Australian Temperament Project (ATP), a population-based cohort study that has followed a representative sample of 2443 participants from infancy to adulthood across 16 waves since 1983. A subsample of 650 participants (50.2% female) of Caucasian descent who provided DNA were genotyped for a serotonin transporter promoter polymorphism (5-HTTLPR). Adolescent disordered eating attitudes and behaviors were assessed using the Bulimia and Drive for Thinness scales of the Eating Disorder Inventory-2 (15–16 years). Depression and emotional control were examined at the same age using the Short Mood and Feelings Questionnaire, and an ATP-devised measure of emotional control. History of sexual abuse and physical punishment were assessed retrospectively (23–24 years) in a subsample of 467 of those providing DNA.

Results:
EDI-2 scores were associated with depression, emotional control, and retrospectively reported parental physical punishment. Although there was statistically significant moderation of the relationship between parental physical punishment and bulimic behaviors by 5-HTTLPR (p = 0.0048), genotypes in this subsample were not in Hardy–Weinberg Equilibrium. No other G×E interactions were significant.

Conclusion:
Findings from this study affirm the central importance of psychosocial processes in disordered eating patterns in adolescence. Evidence of moderation by 5-HTTLPR was not conclusive; however, genetic moderation observed in a subsample not in Hardy–Weinberg Equilibrium warrants further investigation.
Language eng
DOI 10.3389/fpsyg.2017.01361
Field of Research 170102 Developmental Psychology and Ageing
1701 Psychology
Socio Economic Objective 970117 Expanding Knowledge in Psychology and Cognitive Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2017, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30102209

Document type: Journal Article
Collections: School of Psychology
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