Objective sleep in pregnant women: a comparison of actigraphy and polysomnography

Abstract Objectives To compare different actigraphy scoring settings with polysomnography (PSG) for 1 night of total sleep time (TST), sleep efficiency (SE), wake after sleep onset (WASO), and sleep onset latency (SOL) in healthy pregnant women between 6 and 7 months of gestation. Design Secondary analysis using data from a case-control study. Setting A large university-affiliated hospital in the Midwestern United States. Participants A total of 78 pregnant women were recruited, among which 38 healthy women with uncomplicated pregnancies were included for this analysis. Measurements Participants had an overnight PSG assessment at a sleep center while simultaneously wearing an actigraph (Minimitter; Philips Respironics, Andover, MA). Sleep parameters from both devices included TST, SE, WASO, and SOL. Four scoring settings were used to obtain these parameters from actigraphy. Bland-Altman tests were used to evaluate the agreement between sleep variables scored independently from actigraphy and PSG. Results The default scoring setting (10-by-40) yielded significantly different results from the PSG ( P Conclusions Findings from this study do not support the use of default actigraph settings in pregnant women. In contrast, the 10-by-10 scoring setting provided the greatest agreement and least bias in comparison with PSG for sleep measurements. The 10-by-10 scoring setting is recommended to be used in studies consisting of pregnant women.