Table S3. Stepwise multiple linear regression analysis of relationship of ESS with SPS, GVS, GAS, HADS-A, HADS-D, PAS and NAS.
| Steps | β (95%CI) | Standard β | P value |
|---|---|---|---|
| Step 1 | |||
| Constant | −0.15 (−10.56 to 10.26) | 0.97 | |
| Age | −0.06 (−0.18 to 0.06) | −0.15 | 0.35 |
| Gender | 0.73 (−3.13 to 4.59) | 0.05 | 0.70 |
| BMI | 0.37 (0.02 to 0.72) | 0.35 | 0.03 |
| Step 2 | |||
| Constant | −2.16 (−10.63 to 6.34) | 0.61 | |
| Age | 0.02 (−0.08 to 0.13) | 0.07 | 0.61 |
| Gender | −2.03 (−5.37 to 1.30) | −0.15 | 0.22 |
| BMI | 0.11 (−0.18 to 0.42) | 0.11 | 0.44 |
| SPS | 2.85 (1.69 to 4.01) | 0.65 | <0.001 |
| Step 3 | |||
| Constant | −6.08 (−14.16 to 2.00) | 0.13 | |
| Age | 0.01 (−0.08 to 0.11) | 0.04 | 0.71 |
| Gender | −2.22 (−5.25 to 0.80) | −0.16 | 0.14 |
| BMI | 0.22 (−0.06 to 0.50) | 0.21 | 0.11 |
| SPS | 2.16 (1.03 to 3.29) | 0.49 | <0.001 |
| HADS-A | 0.50 (0.19 to 0.81) | 0.37 | 0.002 |
Step 1 model adjusted R2=−0.039 (P=0.188), step 2 model adjusted R2=0.366, (P<0.001) and step 3 model adjusted R2=0.479 (P≤0.001). The threshold for stopping the stepwise regression was F=0.10. BMI, body mass index; SPS, Samn-Perelli 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.