0195 The association of electronic device use before bedtime on objective sleep quality measured with Odds Ratio Product

Abstract

Abstract Introduction Previous research has shown mixed results when it comes to electronic device use and the impact on sleep quality. The use of electronic devices before bedtime can impact sleep quality through engaging content and the impact of blue light on melatonin secretion. In the present study, we assessed the relationship between electronic device use and sleep under real-world conditions. Methods Nineteen participants (age 41.1±10.9; 9 females) recorded their sleep with in-home PSG using the Cerebra Sleep System for 18 to 31 nights (21.5±3.4). Sleep quality was measured using odds ratio product (ORP) derived from spectral analysis of the frontal EEG channels during wake, NREM and REM sleep. Participants completed a nighttime questionnaire within one hour of bedtime where they were asked “Did you do any of these activities today” and indicated “social media or surfed the internet in the last hour before bedtime”. The Karolinska Sleepiness Scale (KSS) was also completed during the before bedtime test battery. Results Across the 19 participants, 17 participants reported using social media or surfing the internet within an hour before bedtime for at least one night. Participants reported usage for 9.6 ± 8.2 nights on average (n=165) but no usage for 11.7 ± 7.9 nights on average (n=210). On nights that internet or social media usage before bedtime was reported, participants had lower levels of evening sleepiness on the Karolinska Sleepiness Scale than on nights where no usage was reported (p <.001). On these nights, participants also had higher ORPNREM (p <.001), higher ORPREM (p<.001), higher ORPTRT (p<.001), higher ORP-9 (p<.001) which is an indication of poorer sleep depth after an EEG arousal. Conclusion On the nights when electronic devices were used before bedtime, participants experienced less sleepiness and had worse objective sleep quality during the night. These results indicate the utility of ORP to be sensitive enough to detect changes in sleep quality after electronic device use. Support (if any)