Author Faculty (Discipline)

Education

Document Type

Article

Publication Date

2-26-2015

Journal

International Journal of Child Health and Nutrition

Volume Number

4

Issue Number

1

Page Numbers

40-49

ISSN

1929-4247

Embargo Period

3-2-2015

ANZSRC / FoR Code

111706 Epidemiology| 111714 Mental Health| 111716 Preventive Medicine

Avondale Research Centre

Lifestyle Research Centre

Reportable Items (HERDC/ERA)

C1

Abstract

Objective: To assess the relative prognostic value of 11 variables including, omega-3, perceived stress, cortisol and sleep duration, in predicting adolescent depression.

Design, Setting and Participants: A cross-sectional study of 444 healthy adolescents aged 16-18 years, from 10 schools within the Northern Sydney and Central Coast regions of New South Wales, Australia. Participants provided blood and saliva samples and completed questionnaires. Statistical classification methods were used to model the relationships between the predictors and depression.

Main Outcome Measures: relative predictive value of each variable in correctly classifying depression.

Results: 6% of boys and 9% of girls were categorised as experiencing severe to extremely severe depression. 4% of boys and 10% of girls were categorised as experiencing severe to extremely severe stress. The mean AM:PM cortisol for boys, 22±101, was higher than that of girls, 11±10. The average omega-3 index for boys, 10.5±3.7, was also higher than that of girls, 7.7±2.6. The average sleep duration of 7.8±1.1 hrs showed no gender differences. The best classification model identified perceived stress as the most significant predictor of depression followed by BMI and omega-3 index. Cortisol ratio was a significant discriminator for boys but not girls. When stress was excluded, shorter sleep duration became a significant discriminator in both boys and girls with waist to hip ratio providing further discrimination in girls only.

Conclusion: The strongest predictor of depression in adolescents was perceived stress followed by higher BMI and lower omega-3 levels. These findings provide a rational basis for establishing program priorities for the prevention and treatment of adolescent depression.

Link to publisher version (DOI)

http://dx.doi.org/10.6000/1929-4247.2015.04.01.4

Peer Review

Before publication

Comments

Used by permission: Lifescience Global

Creative Commons License

Creative Commons Attribution-Noncommercial 3.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial 3.0 License


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