Table 1b.
Sample Subjective and Objective Sleep Parameter Descriptives Assessed at Time 2
| No. (%) or Mean (SD) | Minimum | Maximum | |
|---|---|---|---|
| Subjective Sleep Parameters | |||
| ISI, mean (SD) | 11.8 (4.8) | 1 | 23 |
| Nov-Clinical Symptom Range (0–9), No. (%) | 14 (28) | -- | -- |
| Clinical Symptom Range (10–28), No. (%) | 36(72) | -- | -- |
| DDNSI, mean (SD) | 5–5 (6.3) | 0 | 24 |
| Non-Clinical Symptom Range (0–9), No. (%) | 39 (78) | -- | -- |
| Clinical Symptom Range (10–37), No. (%) | 11 (22) | -- | -- |
| Objective Sleep Parameters, mean (SD)1 | |||
| Bedtime (BT). hli:nun | 02:08 (1:34) | 22:06 | 05:54 |
| Wake Time (WT). hlimnn | 09:21 (1:37) | 04:06 | 12:12 |
| Total Time m Bed (TIB), h | 7.7 (1.1) | 5.0 | 11.0 |
| Naps, No. | 1.35 (1.78) | 0 | 7 |
| Sleep Intervals, No. | 8.37 (2.02) | 6 | 15 |
| Sleep Onset Latency (SoL). m | 11.6(7.8) | 1.2 | 44.9 |
| Total Sleep Time (TST), h | 5.9 (1.1) | 3.2 | 7.6 |
| Wake After Sleep Onset (WASO). m | 31.2 (14.1) | 10.3 | 73.9 |
| Sleep Efficiency (SE), % | 84.4 (6.2) | 64.4 | 93.6 |
| Sleep Variability (SV), h | 6.0 (4.2) | 1.24 | 20.0 |
| SV Onset, h | 3.1 (2.3) | 0.4 | 9.6 |
| SV Offset h | 2.9 (2.1) | 0.3 | 10.4 |
Abbreviations: ISI, Insomnia Severity Index; DDNSI, Disturbing Dreams and Nightmare Severity Index; BT, Bedtime; WT, Wake Time; TIB, Total Time in Bed; SoL, Sleep Onset Latency; TST, Total Sleep Time; WASO, Wake After Sleep Onset; SE, Sleep Efficiency; SV, Sleep Variability; h = hours; m = minutes; hh:mm = clock time
1
One participant lost the Actiwatch device and completed T2, but not T3