Pearson coefficient between quantitative variables
| HST | Diff.ST | ESS | HADS-A | HADS-D | Job demand | Job control | EE | DP | PA | Social support |
|---|---|---|---|---|---|---|---|---|---|---|
| HST | 0.36** | −0.09 | −0.20** | −0.25** | 0.11* | 0.11* | −0.13* | −0.11* | 0.10* | −0.32** |
| Diff.ST | – | −0.01 | 0.15** | 0.09 | −0.08 | −0.12 | 0.13 | 0.08 | −0.14* | 0.17* |
| ESS | – | – | 0.32** | 0.35** | 0.22** | 0.01 | 0.38** | 0.21** | −0.03 | −0.21** |
| HADS-A | – | – | 0.50** | 0.16* | −0.06 | 0.52** | 0.30** | −0.09 | −0.04 | |
| HADS-D | – | – | – | 0.20** | −0.16** | 0.54** | 0.41** | −0.16** | −0.18* | |
| Job demand | – | – | – | – | 0.14* | 0.43** | 0.20** | 0.20** | −0.35** | |
| Job control | – | – | – | – | – | −0.19** | −0.12* | 0.35** | −0.02 | |
| EE | – | – | – | – | – | – | 0.49** | −0.09 | −0.24* | |
| DP | – | – | – | – | – | – | – | −0.09 | −0.09 | |
| PA | – | – | – | – | – | – | – | – | −0.11 |
Values are: Pearson coefficient. *p<0.01; **p<0.001. Bold values are Pearson coefficient >0.4.
HST, habitual sleep time; Diff.ST, Difference between week and weekend sleep time; ESS, Epworth sleepiness scale; HADS-A, (anxiety); HADS-D (depression); EE: emotional exhaustion; DP, depersonalisation; PA, personal accomplishment.