Bright light therapy decreases winter binge frequency in women with bulimia nervosa: a double-blind, placebo-controlled study.
The study objective was to determine the effect of winter bright light therapy on binge and purge frequencies and depressive symptoms in subjects with bulimia nervosa. Thirty-four female bulimic outpatients were treated with either 10,000 lux bright white light or 50 lux dim red light (placebo control) during the winter months. In this double-blind study, the placebo group (n = 18) and the bright light group (n = 16) were matched for age, degree of seasonality (measured by the Seasonal Patterns Assessment Questionnaire [SPAQ]), and concurrent depression (measured by Structured Clinical Interview for DSM-IV [SCID]). Three weeks of baseline data collection were followed by 3 weeks of half-hour daily morning light treatment and 2 weeks of follow-up evaluation. There was a significant light-treatment by time interaction (Wilks' lambda = .81, F(2,28) = 3.31, P = .05). The mean binge frequency decreased significantly more from baseline to the end of treatment for the bright light group (F(1,29) = 6.41, P = .017) than for the placebo group. The level of depression (measured by daily Beck Depression Inventory [BDI] scores) did not significantly differ between the groups during any phase, and neither depression nor seasonality affected the response to light treatment. In this double-blind study, bulimic women who received 3 weeks of winter bright light treatment reported a reduced binge frequency between baseline and the active treatment period in comparison to subjects receiving dim red light.
Braun
D L
DL
Department of Psychiatry, The New York Hospital, Cornell University Medical Center, Westchester Division, White Plains, NY 10605, USA.
Sunday
S R
SR
Fornari
V M
VM
Halmi
K A
KA
D000293:Adolescent; D000328:Adult; D000553:Ambulatory Care; D002032:Bulimia / Q000175:diagnosis / Q000523:psychology*; D003865:Major Depressive Disorder / Q000175:diagnosis / Q000523:psychology* / Q000628:therapy*; D004311:Double-Blind Method; D005247:Feeding Behavior / Q000523:psychology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D010507:Periodicity; D010789:Phototherapy / Q000379:methods*; D016574:Seasonal Affective Disorder / Q000175:diagnosis / Q000469:parasitology* / Q000628:therapy*; D012621:Seasons; D011795:Surveys and Questionnaires