0290 Ambulatory blood pressure monitoring does not reduce the sleep of off-duty firefighters

Abstract Introduction Ambulatory blood pressure monitoring (ABPM) across 24 hours is recommended to confirm hypertension and, outside of a laboratory setting, the only means measure extent any nocturnal decrease in (BP) i.e., BP dipping. The ambulatory device traditionally programmed inflate every 20-30 minutes during awake and sleep. Despite diagnostic benefits, ABPM may disturb sleep lead reduced compliance some individuals. Firefighters, an occupational group with greater risk developing cardiovascular disease, often note continued vigilance sleep, possibly reflecting light and/or frequent awakenings. This potential disturbance contribute firefighters’ disease also impact data. Methods To assess effect on total time (TST) wake after onset (WASO) firefighters, we measured using wrist actigraphy 120 firefighters (91.3% male) from two different departments Oregon. As part larger longitudinal study, participants’ off-shift (as noted daily survey) was recorded for up 14 days at points, months apart. During consecutive off, participants completed 24-48 simultaneous actigraphy. Overall, there were 1273 measures 206 cuff 1067 without cuff. Separate mixed models (on/off) as fixed participant random effect, run TST WASO. Models adjusted bed, department, collection interval. Results Surprisingly, significantly than nights (marginal mean ± SE: 432.0±3.1 vs. 415.9±1.7 respectively, p< 0.001). Increased attributable lower WASO (43.8±2.9 vs 59.8±1.7 minutes, Conclusion Contrary our expectations, not associated disturbed among firefighters. In fact, these data, appeared be improved while wearing Perhaps concerns around poor when have led behaviors those nights, but this hypothesis needs further investigation. Support (if any) U19OH010154, K01HL151745