1281 Sleeping is Believing? Discrepancies Between Perceived and EEG-Measured Sleep Quality in Hospitalized Patients

Abstract Introduction Sleep in the hospital is often fragmented, yet little is known about how objective and subjective sleep measures align in this setting. We compared EEG-derived objective sleep estimates with patient-reported sleep to assess differences in in-hospital sleep duration and continuity. Methods Adult inpatients at a tertiary hospital wore a portable sleep-staging headband, the Sleep Profiler, and completed morning sleep diaries. Participants with complete paired data were included. Diaries captured total sleep time (TST), sleep latency, number of awakenings, and wake after sleep onset. Objective sleep was derived from the Sleep Profiler and scored by a sleep technician. Correlations and mean differences were calculated to assess agreement between methods. Results Thirty-four participants (mean age 59 years; 47% female) completed paired wearable EEG and diaries. Participants reported an average TST of 6h24m, while EEG measured 4h04min, representing an overestimation of approximately 2h20min. Sleep latency was underestimated by an average of 39 minutes. Subjective sleep efficiency averaged at 69% versus objectively measured at 49%. Correlations were weak to modest: TST (r=0.12), sleep latency (r=0.21), and sleep efficiency (r=0.31). Conclusion This study provides novel evidence on the discrepancy between patient-reported and EEG-measured sleep in hospitalized patients. Our findings demonstrate that patients may overestimate their sleep quality while hospitalized. Support (if any) This work was supported by the AASM Foundation Physician Scientist Training Grant.