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CHAPTER 5 DISCUSSION This is one of the first studies to provide information on the efficacy of BLT for NES. To date, only two case studies have shown light therapy as an effective treatment for NES. The first was a case study of a 51-year old obese woman meeting criteria for depression and night eating syndrome (Friedman et al., 2002). In this case, after receiving 14 daily morning 30-minute sessions of l0,000-lux white light therapy, night eating symptoms were reportedly absent. An additional 12 morning sessions were administered one month post-treatment due to symptoms returning. After this second administration, all symptoms of NES reportedly resolved (Friedman et al., 2002). The second case study involved a non-obese 46-year old man meeting criteria for a major depressive episode and NES (Friedman et al., 2004). After receiving 14 daily morning 30- minute sessions of 10,000-lux light therapy, this individual no longer met criteria for depression or NES. NES is conceptualized as a disorder of dysregulated circadian rhythm. Melatonin is an essential regulator of circadian rhythm, and is believed to be a primary target of light therapy. This study may indicate that with resynchronization of circadian rhythm obtained through morning administration of BLT, night eating behaviors will be significantly reduced. Overall NESS scores decreased by 37.6% (mean 25.67 to 16). Nocturnal awakenings were also reduced by 47% on average or 1.6 times per week. Individual item analysis of the NESS further indicates that symptom reduction occurred in the following areas: evening hyperphagia, cravings or urges to eat snacks after supper, but before bedtime, control over eating between supper and bedtime, problems getting to sleep at night, nocturnal awakenings nocturnal 51PDF Image | BRIGHT LIGHT THERAPY FOR late NIGHT EATING SYNDRome
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