We thank Brotman for his comments and the opportunity to further discuss and perhaps clarify our results. Part of the strength of our prospective study is that we anticipated our results from earlier reports indicating that sleep loss affects weight regulatory hormones and hence might potentiate weight gain.1,2 Thus, our results were not random findings from fishing in a large data pool. Since we submitted our article, other investigators have reported results that strengthen this apparent relationship between restricted sleep and obesity.3,4 However, we stress that because our article and the others do not establish a cause-effect relationship, other explanations are possible.
Vorona RD, Ware JC, Buskirk TD. “Regression” of Adiposity With More Sleep—Reply. Arch Intern Med. 2005;165(11):1315. doi:10.1001/archinte.165.11.1315
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