Table 2:
Summary of sleep parameters (median (IQR), assessed via actigraphy, stratified by extent of pain
| Overall | Pain | |||||
|---|---|---|---|---|---|---|
|
|
||||||
| None | Regional | Widespread | p-value1 | |||
|
|
||||||
| Sleep parameter | n | 151 | 189 | 74 | ||
|
| ||||||
| Fragmentation index | Average | 12.76 (9.53, 16.15) | 12.84 (9.73, 16.83) | 13.30 (9.76, 16.15) | 11.22 (8.12, 14.42) | 0.01 |
| Standard deviation | 7.96 (6.34, 10.10) | 7.56 (6.12, 10.03) | 8.46 (6.71, 10.27) | 7.88 (5.93, 9.60) | 0.12 | |
| Maintenance efficiency (%) | Average | 89.12 (85.21, 91.82) | 89.10 (84.68, 91.54) | 88.79 (84.98, 91.58) | 90.40 (86.30, 93.26) | 0.04 |
| Standard deviation | 3.55 (2.38, 4.94) | 3.58 (2.32, 4.85) | 3.59 (2.48, 5.20) | 3.19 (2.23, 4.54) | 0.23 | |
| Sleep duration (mins) | Average | 424 (384, 459) | 424 (389, 459) | 421 (383, 450) | 440 (384, 475) | 0.19 |
| Standard deviation | 55 (38, 81) | 50 (35, 74) | 56 (40, 82) | 62.5 (41, 91) | 0.04 | |
| Sleep onset latency (mins) | Average | 7 (6, 9) | 7 (6, 9) | 7 (6, 9) | 7 (6, 9) | 0.46 |
| Standard deviation | 3 (2, 5) | 3 (2, 5) | 3 (2, 5) | 4 (2, 6) | 0.11 | |
| Wake after sleep onset (mins) | Average | 53 (38, 73) | 53 (40, 75) | 55 (39, 73) | 47.5 (32, 65) | 0.07 |
| Standard deviation | 19 (13, 27) | 18 (13, 27) | 19 (13, 28) | 16.5 (12, 26) | 0.38 | |
1
p-value obtained from Kruskal-Wallis test;
2
p-value obtained from ANOVA