Table 1.
Sample characteristics.
| Variables | Entire sample (n = 552) | EFA sample (n = 285) | CFA sample (n = 267) | Test-retest sample (n = 204) |
|---|---|---|---|---|
| Age (Year); Mean ± SD | 10.79 ± 2.36 | 11.2 ± 2.75 | 10.37 ± 1.97 | 9.75 ± 1.46 |
| Sex (Male); n (%) | 258(46,8) | 129(45.3) | 129(48.3) | 86(42.2) |
| PDSS score; Mean ± SD | 12.71 ± 6.03 | 11.95 ± 6.24 | 13.47 ± 5.79 | 12.75 ± 6.06 |
| Sleep duration, h; Mean ± SD | 8.46 ± 1.6 | 8.13 ± 1.47 | 8.79 ± 1.72 | 8.94 ± 1.19 |
| Daytime nappers, n (%) | 12.4 | 8.4 | 16.3 | 12 |
| Daytime sleep duration, h; Mean ± SD | 0.33 ± 0.64 | 0.39 ± 0.61 | 0.26 ± 0.68 | 0.21 ± 0.63 |
PDSS = Pediatric Daytime Sleepiness Scale; EFA – exploratory factor analysis; CFA - confirmatory factor analysis.