0960 Use of an Innerspring Mattress Improves Deep Sleep and WASO

Abstract Introduction Previous research has shown that comfort, including comfort of the sleep surface, is essential to sleep quality. In addition to comfort, the structure and firmness of a mattress may also play a role when it comes to sleep quality. More empirical research is needed to establish the impact of particular mattresses on both objective and self-reported measures of sleep quality. This study compared sleep on an innerspring mattress to participants’ prior sleep on their original mattress. Methods Healthy adults (68% female, ages 23-69) participated in a 10-week field study, using a pre-post intervention design. During the 4-week baseline period, participants used their regular mattress at home. During the 4-week intervention period, which occurred following a 2-week adjustment period, they used a Sleepy’s by Sealy mattress at home. Sleep was measured objectively using SleepScore Max every night and by daily and pre-post self-report. Multilevel regression and paired t-tests were used to test for statistical significance. Results There were over 757 nights of tracked sleep across 18 participants. Objective sleep measurements showed decreased WASO, both in duration (-13 minutes, p=.024) and proportion of the night (p=.025). Also, there was an increase in deep sleep (+12 minutes, p=040). Self-report measures revealed that the innerspring mattress felt more comfortable (p<.001). Improvements also were found for a variety of perceived sleep outcomes, including time to fall asleep, waking less often, spending less time awake, longer sleep duration, better sleep quality, and feeling more rested in the morning (ps<.05). Conclusion Objectively-measured sleep and self-reported sleep improved when using the innerspring mattress compared to healthy adults’ original mattresses. Furthermore, qualitative and quantitative self-report results suggested that the intervention was perceived as comfortable. Support (if any) Mattress Firm INC