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Night-Eating Syndrome
Title:Behavioral and neuroendocrine characteristics of the night-eating
syndrome
Author: G. Birketvedt, et al.
Address: Tromso, Norway
Source: Journal of the American Medical Association 282: 657-663 (August)
1999
Summary: To characterize night-eating syndrome (NES) on the basis of
behavioral characteristics and neuroendocrine data, a behavioral observational
study was conducted between January 1996 and June 1997, and a neuroendocrine
study was conducted from May - August 1997. The subjects in the behavioral study
included 10 obese patients who met criteria for NES (morning anorexia, evening
hyperphagia, and insomnia) and 10 matched controls. They were observed for 1 week
on an outpatient basis in order to determine energy intake, mood level, and sleep
disturbances. The neuroendocrine study included 12 night eaters and 21 controls
who were observed for a 24-hour period in the hospital. This study measured
circadian levels of plasma melatonin, leptin, and cortisol. In the behavioral
study, night eaters had more eating episodes in the 24 hours and consumed
significantly more of their daily energy intake at night than did controls. They
averaged 3.6 awakenings per night compared with 0.3 by controls. In night eaters,
52% of the awakenings were associated with food intake. None of the controls ate
during their awakenings. In the neuroendocrine study, night eaters had
alleviation of the nocturnal rise in plasma melatonin and leptin levels and
higher circadian levels of plasma cortisol. A coherent pattern of behavioral and
neuroendocrine characteristics was found in subjects with NES.
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