Table 5.
Actigraphy mean scores and group comparisons (ITT, n = 43)
| Group means of the actigraphy measures (SD) | Change scores (SD) Baseline versus postintervention | Comparisons† Active versus placebo 0–16-week Diff. | ||||||
|---|---|---|---|---|---|---|---|---|
| Baseline | Postintervention (16 weeks) | |||||||
| Active (n = 19) Imputed n = 2 | Placebo (n = 24) Imputed n = 0 | Active (n = 19) Imputed n = 4 | Placebo (n = 24) Imputed n = 5 | Active (n = 19) | Placebo (n = 24) | Z/t-value | P-value | |
| Time child fell asleep | 20:27 (43 min) | 20:32 (51 min) | 21:3 (50 min) | 20:47 (61 min) | 36 min (45 min) | 15 min (69 min) | Z: 1.333 | 0.183 |
| Time child woke up | 7:31 (69 min) | 7:18 (72 min) | 7:31 (52 min) | 7:21 (76 min) | 0 min (91 min) | 3 min (66 min) | t: −0.12 | 0.909 |
| Minutes sleep duration | 654 min (59 min) | 640 min (49 min) | 639 min (52 min) | 611 min (66 min) | −16 min (87 min) | −29 min (53 min) | t: 0.6 | 0.551 |
| Minutes awake | 157 min (57 min) | 140 min (64 min) | 96 min (39 min) | 123 min (57 min) | −61 min (74 min) | −17 min (80 min) | t: −1.88 | 0.068+ |
| Minutes of sleep | 497 min (84 min) | 500 min (68 min) | 543 min (64 min) | 488 min (89 min) | 46 min (114 min) | −12 min (95 min) | Z: 2.177 | 0.029* |
| Sleep efficiency (ratio) | 0.76 (0.092) | 0.78 (0.098) | 0.85 (0.061) | 0.8 (0.098) | 0.09 (0.117) | 0.01 (0.132) | t: 2.000 | 0.052+ |
| Sleep latency (min) | 15 min (19 min) | 27 min (29 min) | 14 min (22 min) | 25 min (33 min) | −1 min (33 min) | −2 min (38 min) | Z: .379 | 0.704 |
| Wake episodes | 22.92 (6.622) | 19.29 (8.459) | 12.86 (3.93) | 15.78 (6.521) | −10.06 (8.39) | −3.52 (8.092) | t: −2.59 | 0.013* |
ITT, mean imputation of missing observations.
*
P < 0.05,
+
P < 0.1.
†
Some variables are normal, some non-normally distributed; if Shapiro – Wilk was P > 0.05, a t-test was used, otherwise Wilcoxon's rank sum.