Table 4.
Correlations of Sleep Diary with MotionWatch Measures.
| SD measures | ||||||
|---|---|---|---|---|---|---|
| Latency | Accuracy | Awakenings | Quality | Sleep window | Sleep duration | |
| MW-latency | 0.31**/0.33** | −0.18/−0.22 | −0.001/0.02 | 0.02/0.05 | 0.05/0.01 | −0.07/−0.11 |
| MW-efficiency | −0.09/−0.10 | 0.30**/0.31** | −0.07/−.03 | 0.19/0.19 | 0.05/0.03 | 0.14/0.15 |
| MW-duration | 0.16/0.14 | 0.30**/0.27* | 0.03/0.08 | 0.08/0.11 | 0.61***/0.61*** | 0.45***/0.49*** |
| MW-fragmentation | 0.01/0.15 | −0.24*/−0.17 | 0.06/0.11 | −0.17/−0.19 | 0.15/0.16 | 0.01/−0.02 |
| MW-composite | 0.01/−0.07 | 0.30**/0.26* | −0.06/−0.06 | 0.13/0.16 | 0.13/0.11 | 0.20/0.23 |
| L5 Start | −0.02/−0.05 | −0.07/−0.08 | 0.13/0.13 | 0.21/0.23 | 0.26*/0.29* | 0.29**/0.34** |
| M10 Start | 0.000/−0.14 | −0.14/−0.21 | 0.07/0.03 | 0.06/0.08 | 0.05/0.11 | 0.13/0.23 |
| Relative amplitude | 0.14/0.11 | 0.21/0.19 | −0.06/−0.06 | 0.17/0.18 | −0.01/−0.04 | −0.01/−0.001 |
| Inter-daily stability | 0.12/0.20 | −0.01/0.03 | 0.19/0.23 | −0.16/−0.18 | 0.01/0.01 | −0.28*/−0.30** |
| Intra-daily variability | −0.28*/−0.24* | −0.05/−0.02 | −0.05/−0.02 | −0.05/−0.05 | −0.06/−0.08 | 0.06/0.04 |
Bivariate correlations appear on the left side of the forward slash and partial correlations appear on the right side. Partial correlations are covaried for participant gender, age, Montreal Cognitive Assessment score, education, and days of Motion Watch wear. MW, motion watch; PSQI, Pittsburgh Sleep Quality Index; SD, sleep diary.
*
p < 0.05;
**
p < 0.01;
***
p < 0.001.