A Comparison of a Wrist Worn Portable Device (watchpat)™ with In-Lab Polysomnography for the Diagnosis of Obstructive Sleep Apnea

To assess the sensitivity of WatchPAT 200 for the diagnosis of moderate-to-severe OSA and diagnosis of OSA (any severity) using in-lab full-night polysomnography (PSG) as the gold standard in Indian subjects. The concordance rate between the two devices for the severity category of OSA was also assessed. This was a retrospective study involving patients who underwent simultaneous sleep study using WatchPAT 200 and in-lab polysomnography for the diagnosis of OSA during the study period. A baseline evaluation using the Epworth sleepiness scale, STOP-BANG questionnaire, and co-morbidities assessment was done for all patients. Pearson’s correlation coefficients and Bland–Altman plots were used to assess the correlation and agreement. Among 70 subjects, 91.4