Table 1.

Descriptive statistics (M ± SD; N) for participant age, sex and sleep characteristics by age group

Group	2–4.9 years	5–8.9 years	9.00–16.9 years	p
Age	3.3 ± 1.1	6.7 ± 1.7	12.6 ± 2.5	<0.001*
N (female)	11 (4)	9 (3)	9 (5)	0.58
Time in bed (minutes)	609.5 ± 65.6	601.6 ± 55.0	515.6 ± 64.6	0.005*
Total sleep time (minutes)	540.8 ± 66.0	532.2 ± 67.1	467.7 ± 52.5	0.04
Sleep latency (minutes)	31.4 ± 19.8	19.7 ± 11.9	22.0 ± 14.4	0.24
Sleep efficiency (%)	88.6 ± 3.8	88.4 ± 6.3	90.9 ± 3.9	0.45
Stage 1 (%)	1.1 ± 0.4	1.6 ± 1.0	5.6 ± 4.2	0.02*
Stage 2 (%)	33.9 ± 3.6	45.0 ± 6.6	50.9 ± 4.5	<0.001*
Stage 3 (%)	30.2 ± 7.4	29.5 ± 5.6	23.1 ± 4.8	0.04
REM (%)	34.8 ± 5.9	23.9 ± 8.1	20.4 ± 3.7	<0.001*

*Significant after False Discovery correction.