Table 1 Sample characteristics
From: Sleep and mental health in childhood: a multi-method study in the general pediatric population
|  | 10–11 years | 13–14 years | ||
|---|---|---|---|---|
n | 788 | n | 344 | |
Age actigraphy (M, SD)* | 788 | 11.67 (0.20) | 344 | 14.70 (0.33) |
Age self-reported sleep (M, SD)* | 788 | 9.75 (0.23) | 344 | 13.93 (0.62) |
Age CBCL (M, SD)* | 788 | 9.70 (0.24) | 344 | 13.52 (0.29) |
Sex (%) | ||||
 Girl | 414 | 52.5% | 190 | 55.2% |
 Boy | 374 | 47.5% | 154 | 44.8% |
National origin (%) | ||||
 Western | 716 | 90.9% | 318 | 92.4% |
 Non-Western | 72 | 9.1% | 26 | 7.6% |
Maternal education level (%)* | ||||
 High | 509 | 64.6% | 194 | 56.4% |
 Middle | 245 | 31.1% | 139 | 40.4% |
 Low | 10 | 1.3% | 7 | 2.0% |
 Missing | 24 | 4.7% | 4 | 2.1% |
Gestational age at birth (M, SD) | 788 | 39.63 (2.26) | 342 | 39.54 (2.31) |
Maternal anxiety (M, SD) | 773 | 1.43 (2.09) | 323 | 1.39 (1.99) |
Maternal depression (M, SD) | 773 | 1.0 (2.16) | 323 | 1.05 (2.02) |
Behavior (M, SD) | ||||
 Internalizing* | 788 | 4.47 (4.79) | 344 | 5.25 (5.57) |
 Externalizing | 788 | 3.59 (4.45) | 344 | 3.63 (4.39) |
 Dysregulation profile | 788 | 7.85 (7.27) | 344 | 7.21 (7.55) |
Sleep (M, SD) | ||||
 Sleep duration (time duration; hh:mm)* | 788 | 7:42 (0:40) | 344 | 7:16 (0:52) |
 Sleep onset (clock time; hh:mm)* | 788 | 22:26 (0:54) | 344 | 23:27 (0:50) |
 Sleep onset latency (time duration; hh:mm)* | 788 | 0:52 (0:37) | 344 | 0:19 (0:23) |
 Sleep efficiency (%)* | 788 | 83.96 (4.52) | 344 | 85.35 (5.15) |
 Nocturnal waking times* | 786 | 3.05 (1.53) | 344 | 2.83 (1.55) |
 Interdaily stability* | 785 | 0.18 (0.04) | 344 | 0.15 (0.05) |
 Intradaily variability* | 785 | 0.58 (0.09) | 344 | 0.52 (0.11) |
 Onset least active 5 h | 786 | 00:47 (0:51) | 344 | 00:44 (0:58) |
 Self-report* | 788 | 2.50 (1.24)** | 344 | 1.44 (1.26) |
 Mother-report | 782 | 9.26 (2.64) | 339 | 9.14 (2.65) |