0354 Effects of In-Bed Temperature Programs on Sleep Duration: Large-Scale Data from a Smart Bed Platform

Abstract Introduction The ability of a smart bed platform to control the in-bed temperature was leveraged to identify changes in temperature across the night that might enhance sleep quality. A whole-night temperature program consists of four sequential 2-hour segments, each with a specific temperature setting (heating or cooling) at three possible intensity levels (low, medium, high). starting about 30 minutes before sleep onset. Heating and cooling are accomplished by respectively pushing warm air into the bed microclimate or pulling air from it. The smart bed includes validated ballistocardiography-based algorithms to quantify movement and cardiorespiratory metrics during sleep. From these, sleep and restful sleep durations were estimated. Restful sleep corresponds to sleep with sub-threshold movement level. Methods Thirty-one participants (12F/19M, mean age 48.6 (SD: 11.2) years-old), recruited among smart bed owners, enrolled in a controlled study within their homes. Each participant experienced 4 OFF only sessions and 10 sessions with temperature programs including balanced heating/cooling conditions. Additionally, the data from 2.2 million sleep sessions from 33’814 Sleep Number customers (17482 F/16332 M; mean age 48.8 (SD: 7.0) years-old) that experienced self-applied temperature settings were used to refine the temperature program recommendations. Linear mixed models were used to determine the optimal temperature program (i.e. temperature setting for each segment) to increase restful sleep. Results CONTROLLED STUDY For women and men, heating in the first segment followed by cooling in the second segment significantly increased restful sleep duration by 14.9 and 19.4 minutes respectively. FIELD DATA These data allowed us to identify the temperature setting for each sequential segment to maximize restful sleep relative to Off. Restful sleep (women) ~ 478.8 + 7.14×Low Heating + 0.65×Medium Cooling + 1.80×Low Cooling + 3.49×Low Cooling [minutes] Restful sleep (men) ~ 448.2 + 6.84×Low Heating + 0.67×Low Cooling + 2.80×Medium Cooling + 2.59×Low Cooling [minutes] The optimal temperature program may increase restful sleep duration by 13.1- and 12.9-minutes relative to Off, in women and men respectively. Conclusion The results using the controlled study and field data are consistent and suggest that starting with low heating and following with cooling settings may increase restful sleep duration. Support (if any)