The association between sleep duration and obesity amongst Canadians aged 12 and over

In this paper, published on PeerJ Preprints, the authors describe the relationship between sleep, obesity and hormones in adolescent Canadians.  The authors used data from the 2012 Canadian Community Health Survey (CCHS) to evaluate sleep duration and body mass index .  The authors looked both at adolescents (12-17) and adults (18+).  In both cases, obese and overweight participants slept less, with a negative correlation between sleep and obesity with correlation co-efficients of -0.031 and -0.056 for adolescents and adults respectively.  This is consistent with other studies that have also shown that sleep deficits either lead to, or correlated with increased obesity risk.

  • I am curious if the lack of sleep corresponded to changes in activity level or food intake, if that data is in the survey, or whether sleep deprivation is an independent predictor of obesity.
  • A plot showing the correlation would be helpful.  The analysis presumes a linear relationship between sleep and obesity, but if it is a nonlinear relationship, a more powerful model could be used.
  • Was the relationship similar between males and females?
  • The p-values are missing in Table 3
  • It would be helpful if the introduction and discussion had some more details of some of the other proposed causes of obesity, in addition to sleep disruption.

As a side note, this project came out of a undergraduate research project, so congratulations are due to both Maha Temkit and her advisor, Dr. Sanni Yaya for publishing an interesting UROP project!

Temkit, Maha, & Yaya, Sanni (2015). The association between sleep duration and obesity amongst Canadians aged 12 and over PeerJ Preprints : 10.7287/peerj.preprints.962v1