Table 3 Agreement of predicted digital summary endpoints with reference system (PSG for sleep, video annotations for scratch) derived endpoints.
From: Development of digital measures for nighttime scratch and sleep using wrist-worn wearable devices
Digital measure | Sample size (n) | Pearson correlation coefficient | Mean bias and limits of agreement |
|---|---|---|---|
Total sleep opportunity | 32 | 0.72*** | 29.66 (−88.63, 147.94) |
Total sleep time | 32 | 0.76*** | −24.19 (−148.14, 99.75) |
Percent time asleep | 32 | 0.41* | −10.17 (−38.89, 18.55) |
Total scratch counts (log transformed) | 25 | 0.63*** | 0.13 (−1.16, 1.41) |
Total scratch duration (log transformed) | 25 | 0.82*** | 0.71 (−0.22, 1.63) |
