Vasomotor and depression symptoms may be associated with different sleep disturbance patterns in postmenopausal women

OBJECTIVE: This study aims to explore the association of vasomotor symptoms (VMS) and depression symptoms with different symptoms of subjective sleep disturbance in postmenopausal women. METHODS: This is a cross-sectional study of 163 postmenopausal women (not taking hormone therapy) attending a university menopause clinic. Measures included the Athens Insomnia Scale, Greene Climacteric Scale, and Symptom Checklist-90-Revised depression subscale. Covariate-adjusted ordinal logistic regression was used to investigate the association of VMS and depression with each item of the Athens Insomnia Scale. RESULTS: Controlling for confounding factors, we found VMS to be significantly associated with awakenings during the night (odds ratio [OR], 1.85; P < 0.001), overall quality of sleep (OR, 2.00; P < 0.001), well-being during the day (OR, 1.63; P = 0.008), functioning capacity during the day (OR, 1.72; P = 0.01), and sleepiness during the day (OR, 1.66; P = 0.03); whereas we found Symptom Checklist-90-Revised depression subscale scores to be associated with sleep induction (OR, 2.09; P < 0.001), final awakening earlier than desired (OR, 2.21; P < 0.001), total sleep duration (OR, 1.62; P = 0.01), overall quality of sleep (OR, 1.64; P = 0.009), well-being during the day (OR, 1.67; P = 0.006), functioning capacity during the day (OR, 1.68; P = 0.01), and sleepiness during the day (OR, 1.57; P = 0.04). CONCLUSIONS: VMS and depression symptoms are associated with different patterns of sleep disturbance. Although both symptoms are related to sleep quality, daytime functioning, and daytime well-being, depression is uniquely associated with difficulty falling asleep and waking up earlier than desired, whereas VMS are related to frequent awakenings during sleep. The findings are limited by the cross-sectional design and relatively small sample size of the study. Recommendations for future research are discussed to guide this line of inquiry and to gain a better understanding of the complex relationship between climacteric and mood symptoms and their contribution to the development of sleep disturbances during menopause.