Table A.1.
Four class solution class comparisons (means (SD) / percentages) for continuous and categorical sleep indicators, sleep measures not in the mixture model, and CES-D.
| Class A (n=704) | Class B (n=423) | Class C1 (n=197) | Class C2 (n=127) | partial η2/Cramér’s V | |
|---|---|---|---|---|---|
| Continuous indicators (means (SD)) | |||||
| BT | 22.91 (0.62) | 23.43 (0.63) | 24.42 (0.64) | 01.10 (0.65) | 0.57* |
| RT | 6.49 (0.67) | 6.69 (0.60) | 6.75 (0.66) | 6.85 (0.65) | 0.04* |
| dBT | 1.45 (0.90) | 0.93 (0.82) | 1.45 (0.78) | −0.51 (1.04) | 0.29* |
| dRT | 2.64 (1.21) | 2.45 (1.03) | 4.22 (1.20) | 2.67 (1.28) | 0.19* |
| Categorical indicators (percentages) | |||||
| SOL (0,1,2) | 42,43,15 | 93,6,1 | 65,27,8 | 93,5,2 | 0.35* |
| NOA (0,1,2) | 43,5,52 | 96,1,3 | 88,1,11 | 75,3,22 | 0.36* |
| NAPS (0,1,2) | 58,27,15 | 62,27,11 | 7,44,49 | 19,33,48 | 0.32* |
| PSQ (0,1,2) | 10,70,20 | 40,56,4 | 7,64,29 | 10,56,34 | 0.29* |
| SD (0,1,2) | 0,89,11 | 28,72,0 | 9,85,6 | 13,81,6 | 0.30* |
| Sleep variables not entered in the mixture model (means (SD)) | |||||
| BSS | 5.29 (4.06) | 4.63(3.58) | 7.42(4.78) | 7.43(4.69) | 0.06* |
| HÖQ | 50.59(7.76) | 50.87(8.14) | 41.26(7.26) | 46.03(7.52) | 0.16* |
| TIB (school-nights) | 7.62(0.81) | 7.26(0.77) | 6.33(0.86) | 5.66(1.03) | 0.37* |
| TIB (non-school-nights) | 9.10(1.35) | 8.93(1.55) | 8.78(1.26) | 8.77(1.09) | 0.01** |
| Depression (means (SD)) | |||||
| CES-D | 12.33(8.25) | 9.48(7.00) | 12.95(8.29) | 13.93(9.66) | 0.03* |
*
p<0.001;
**
p<0.01;
BT: bedtime, RT: rise time, dBT: difference in BT between non-school night and school night, dRT: difference in RT between non-school night and school night, SOL: sleep onset latency (school nights), NOA: number of awakenings (school-nights), PSQ: perceived sleep quality, SD: sleep disturbance, BSS: Bradley Sleepiness Scale, HÖQ: Horne-Östeberg Questionnaire, TIB: time in bed, CES-D: Center for Epidemiologic Studies - Depression Scale, η2 : eta squared.