Table 4.
Subjective and actigraphy-derived objective circadian rhythm data for children with PTSD.
| Circadian Data for PTSD | |||
|---|---|---|---|
| Variables | Mean | Standard Deviation | Median |
| Objective circadian data (NPCRA) | |||
| L5 onset (h) | 03:12:00 | 06:18:00 | 01:30:00 |
| M10 onset (h) | 09:30:00 | 01:18:00 | 09:30:00 |
| RA (Relative Amplitude) | 0.91 | 0.05 | 0.91 |
| IS (Inter-daily stability) | 0.48 | 0.13 | 0.45 |
| IV (Intraday variability) | 0.73 | 0.15 | 0.67 |
| Subjective circadian data CCTQ) | |||
| MSFsc | 3.10 | 1.39 | 2.82 |
| Total MSFsc (h) | 03:05:49 | 01:23:17 | 02:35:54 |
| Sleep debt (h) | 01:38:00 | 00:47:00 | 02:16:00 |
| Sleep debt (% of total) | 50 | ||
Values given as mean, standard deviation and median. NPCRA: Non-Parametric Circadian Rhythm Analysis; L5 onset: start of five-hour nycthemer with minimum activity; M10 onset: start of ten-hour nycthemer with maximum activity; IS: inter-day stability; IV: intra-day variability; RA: relative amplitude; CCTQ (Child Chronotype Questionnaire); MSFsc (Middle Sleep on Free days corrected) = MSF − 0.5 (TTS on free days-TTS on work days (MSF (Middle Sleep on Free days) = sleep onset time on free days + (TTS on free days/2)); Neutral chronotype: MSFsc: 2.17–7.25; Morning chronotype ≤ 2.17; Evening chronotype: MSFsc ≥ 7.25; Sleep debt: difference between TTS between free days and school days greater than 2 h.