Table S2. Independent samples t-test statistics for questionnaire scores between males and females with equal variances assumed.
| Scales | t-test for equality of means | ||||||
|---|---|---|---|---|---|---|---|
| t | df | Sig. (2-tailed) | Mean difference (points) | Std. error difference | 95% confidence interval of the difference | ||
| Lower | Upper | ||||||
| SPS | 2.675 | 48 | 0.010 | 1.1200 | 0.4187 | 0.2781 | 1.9619 |
| SSS | 1.902 | 47 | 0.063 | 0.7450 | 0.3916 | −0.0428 | 1.5328 |
| ESS | 0.543 | 48 | 0.589 | 1.060 | 1.951 | −2.863 | 4.983 |
| GAS | −0.701 | 48 | 0.487 | −4.200 | 5.990 | −16.244 | 7.844 |
| GVS | −0.699 | 48 | 0.488 | −4.200 | 6.005 | −16.274 | 7.874 |
| HADS-A | 1.269 | 47 | 0.211 | 1.850 | 1.457 | −1.082 | 4.782 |
| HADS-D | 0.269 | 47 | 0.789 | 0.353 | 1.315 | −2.293 | 2.999 |
| PAS | 0.136 | 48 | 0.892 | 0.360 | 2.649 | −4.966 | 5.686 |
| NAS | 1.353 | 48 | 0.182 | 2.880 | 2.129 | −1.401 | 7.161 |
SPS, Samn-Perelli Scale; SSS, Stanford Sleepiness Scale; ESS, Epworth Sleepiness Scale; GAS, Global Affect Scale; GVS, Global Vigor Scale; HADS-A, Hospital Anxiety Scale; HADS-D, Hospital Depression Scale; PAS, Positive Affect Scale; NAS, Negative Affect Scale.