this study on pre-schoolers N = 44 (%) | health survey on pre-schoolers N = 931 (%) | z | p | |
before 9 pm | 2 (4.5) | 120 (12.9) | −1.635 | 0.102 |
9 - 10 pm | 29 (65.9) | 533 (57.3) | 1.136 | 0.256 |
after 10 pm | 13 (29.6) | 233 (25.0) | 0.674 | 0.500 |
N.A. | 0 (0.0) | 45 (4.8) | −1.488 | 0.137 |