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The primary aim of this study is to examine the effects of co-administered wake therapy followed by light treatment on mood, and secondarily on circadian rhythms, to test the hypothesis that critically-timed chronotherapy improves mood by correcting phase disturbances in melatonin and sleep in women with Premenstrual Dysphoric Disorder.
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The design is a randomized cross-over contrasting Late Wake Therapy plus morning bright light (LWT+Am BWL)vs. Early Wake Therapy plus evening bright light (EWT+PM BWL)administered in the luteal phase of two separate menstrual cycles, and preceded by 2 evaluation months. To lessen the patient's burden, the 1-night EWT or LWT and the following 7-day BWL interventions will be conducted at home, given at a fixed point in each menstrual cycle, from day 1 to 7 after the mid-cycle luteinizing hormone(LH) surge (ovulation). We anticipate that LWT+7 days of AM BWL (vs. EWT+PM BWL) will produce much greater mood benefits and larger physiological responses, than the one-time light pulses used in our earlier phase-shift studies.
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43 participants in 2 patient groups, including a placebo group
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Data sourced from clinicaltrials.gov
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