Table 5.

Correlations between sleep and physical activity in all children 6–18 years

Children (n = 82)	Time in bed (h/day)	Total sleep time (h/day)	Sleep efficiency (%)	Sleep fragmentation index (%)
Median duration of prolonged sedentary bouts (min)	r = 0.12 p = 0.29	r = 0.14 p = 0.22	r = 0.16 p = 0.18	r = − 0.06095 p = 0.6060
Total prolonged sedentary bout time (min/day)	r = − 0.52 p < 0.0001	r = − 0.52 p < 0.0001	r = − 0.19 p = 0.11	r = 0.33 p = 0.004
Total activity Z-score (standard deviations)	r = 0.20 p = 0.09	r = 0.20 p = 0.10	r = 0.06 p = 0.60	r = − 0.20 p = 0.09

Spearman correlation coefficients. Significant correlations in bold