Table 3.
Comparisons of the results from actigraphy rest-activity circadian rhythm and sleep data with those from a sample of community-dwelling US adultsa.
| Parameters | ARDS survivors (n = 14) | Community-dwelling US adults (n = 578) | E.S.(G) | p |
|---|---|---|---|---|
| Age, years | 49.1 (15.9) | 51.9 (14.9) | −0.19 | 0.489 |
| Body mass index, kg/m2 | 27.4 (3.5) | 27.5 (6.0) | −0.02 | 0.951 |
| 24-h rhythm stability /variability | ||||
| NPCRA IS | 0.32 (0.10) | 0.49 (0.12) | −1.42 | <0.001 |
| NPCRA IV | 0.55 (0.18) | 0.86 (0.24) | −1.30 | <0.001 |
| Activity strength | ||||
| Cosinor Mesor, ln counts | 2.9 (0.43) | 3.9 (0.5) | −2.01 | <0.001 |
| 24-h rhythm strength | ||||
| Cosinor Magnitude, ln counts | 1.8 (0.39) | 2.6 (0.5) | −1.61 | <0.001 |
| NPCRA Amplitude, ln counts | 3.23 (0.68) | 7.0 (0.3) | −12.03 | <0.001 |
| NPCRA Relative Amplitude (RA) | 0.64 (0.11) | 0.77 (0.11) | −1.18 | <0.001 |
| 24-h rhythm phase | ||||
| Cosinor Acrophase, decimal hours | 15.40 (2.05) | 14.6 (1.3) | 0.61 | 0.261 |
| NPCRA L5 midpoint, decimal hours | 3.44 (2.49) | 2.7 (1.3) | 0.55 | 0.288 |
| NPCRA M10 midpoint, decimal hours | 15.26 (2.64) | 14.2 (1.6) | 0.65 | 0.158 |
| Actigraphy sleep parameters | ||||
| Total sleep time, hours | 7.4 (1.2) | 6.90 (0.97) | 0.51 | 0.146 |
| Sleep efficiency, % | 81.7 (4.8) | 85.6 (7.10) | −0.55 | 0.010 |
ARDS, acute respiratory distress syndrome; NPCRA, non-parametric circadian rhythm analysis; Ln, natural log; IS, interdaily stability; IV, intradaily variability; E.S.(G), Hedges' G effect sizes. Bold values denote the significance at the p < 0.05 level.
a
Data reported by Cespedes et al. (37).