“…More recently, Park et al [8] examined sleep, mood, melatonin, light, and wrist activity in 384 postmenopausal women. Self-reported sleep latency was positively correlated with insomnia, mood disturbance, hot fl ashes, hypertension, use of antihypertensive medication, and melatonin acrophase and offset and was negatively associated with global assessment of functioning, light exposure, and wrist activity.…”