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Association between subjective actual sleep duration, subjective sleep need, age, body mass index, and gender in a large sample of young adults

Authors Kalak N, Brand S, Beck J, Holsboer-Trachsler E, Wollmer MA

Received 24 September 2014

Accepted for publication 17 November 2014

Published 9 January 2015 Volume 2015:11 Pages 107—113

DOI https://doi.org/10.2147/NDT.S74829

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 5

Editor who approved publication: Dr Roger Pinder

Nadeem Kalak,1 Serge Brand,1,2 Johannes Beck,1 Edith Holsboer-Trachsler,1 M Axel Wollmer1,3

1Psychiatric Clinics of the University of Basel, 2Department of Sport and Health Science, Division of Sport Science, University of Basel, Basel, Switzerland; 3Asklepios Clinic North Ochsenzoll, Asklepios Campus Hamburg, Medical Faculty, Semmelweis University, Hamburg, Germany

Background: Poor sleep is a major health concern, and there is evidence that young adults are at increased risk of suffering from poor sleep. There is also evidence that sleep duration can vary as a function of gender and body mass index (BMI). We sought to replicate these findings in a large sample of young adults, and also tested the hypothesis that a smaller gap between subjective sleep duration and subjective sleep need is associated with a greater feeling of being restored.
Methods: A total of 2,929 university students (mean age 23.24±3.13 years, 69.1% female) took part in an Internet-based survey. They answered questions related to demographics and subjective sleep patterns.
Results: We found no gender differences in subjective sleep duration, subjective sleep need, BMI, age, or feeling of being restored. Nonlinear associations were observed between subjective sleep duration, BMI, and feeling of being restored. Moreover, a larger discrepancy between subjective actual sleep duration and subjective sleep need was associated with a lower feeling of being restored.
Conclusion: The present pattern of results from a large sample of young adults suggests that males and females do not differ with respect to subjective sleep duration, BMI, or feeling of being restored. Moreover, nonlinear correlations seemed to provide a more accurate reflection of the relationship between subjective sleep and demographic variables.

Keywords: young adults, subjective sleep duration, subjective sleep need, body mass index, Internet-based study

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