Results of a pilot study of a cooling mattress pad to reduce vasomotor symptoms and improve sleep.

Objective: This single-arm pilot study was designed to generate pilot data on the use of a cooling mattress pad system on vasomotor symptoms (VMS; hot flashes and/or night sweats), self-assessed sleep, and daily hot flash interference among perimenopausal and postmenopausal women.

Methods: A total of 15 perimenopausal and postmenopausal women aged 45 to 59 years experiencing four or more VMS per day were recruited from the community. After completion of baseline questionnaires and a 2-week daily diary to confirm VMS eligibility, all women received a cooling mattress pad system to use at night for 8 weeks, during which time they continued to complete their daily diaries to record VMS frequency and severity. The primary study outcome was change from baseline in VMS frequency. Secondary outcomes were sleep quality, measured by the Pittsburgh Sleep Quality Index, and hot flash interference with daily life, assessed by the Hot Flash Related Daily Interference Scale, where higher sores indicate worse sleep quality and higher interference, respectively. We used repeated-measures methods (analysis of covariance, paired t tests, and McNemar test) to evaluate outcomes.

Results: VMS frequency significantly declined by 52% at 8 weeks ( P < 0.0001). Mean total Pittsburgh Sleep Quality Index score significantly declined 3.27 points from 11.14 at baseline to 7.87 at follow-up ( P = 0.011). The total Hot Flash Related Daily Interference Scale score significantly declined from 4.16 at baseline to 1.92 at follow-up ( P = 0.011).

Conclusions: Women who used a cooling mattress pad system experienced significant and clinically meaningful reductions in VMS frequency, sleep disturbance, and hot flash interference with daily activities over an 8-week period. These results provide preliminary evidence suggesting that a cooling mattress pad used while sleeping can provide a nonpharmacological option to reduce VMS and sleep disturbance for women experiencing menopausal hot flashes.