Table 1.
Minimum, maximum and mean (SD) anthropometric and sleep values (75 children).
| Anthropometrics | Mean (SD) | Minimum | Maximum |
|---|---|---|---|
| Age (y) | 8.5 (2.6) | 3.1 | 13.2 |
| Height (cm) | 130.3 (16.3) | 89.0 | 192.0 |
| Weight (kg) | 30.8 (11.7) | 13.0 | 82.7 |
| BMI (age and gender adjusted) | 17.6 (2.6) | 13.4 | 26.8 |
| BMI z-score | 0.4 (0.8) | –1.6 | 2.2 |
| Sleepa | |||
| Sleep onset time (h:min) | 21:40 (0:42) | 20:01 | 23:53 |
| SWS1 onset time (h:min) | 22:58 (1:08) | 21:07 | 23:51 |
| SWS2 onset time (h:min) | 24:44 (1:31) | 21:10 | 02:47 |
| REM3 onset time (h:min) | 01:39 (1:13) | 23:09 | 03:31 |
| SWS3 onset time (h:min) | 02:40 (1:39) | 21:51 | 05:21 |
| REM2 onset time (h:min) | 03:26 (1:23) | 23:14 | 05:54 |
| REM1 onset time (h:min) | 05:01 (1:17) | 01:15 | 07.52 |
a
SWS, slow wave sleep. SWS cycles are labeled relative to initial sleep onset: SWS cycle after sleep onset = 1st SWS, SWS cycle after sleep onset but one = 2nd SWS and SWS cycle after sleep onset but two = 3rd SWS cycle. REM, rapid eye movement sleep. REM cycles are labeled relative to sleep offset: REM cycle prior to sleep offset = REM1, REM cycle preceding sleep offset but one = REM2 and REM cycle preceding sleep offset but two = REM3 (see Figure 1).