| Independent variable |
β | SE | Wald χ2 | p | 95%CI |
|---|---|---|---|---|---|
| (Intercept) | -3.974 | 0.629 | 39.915 | < 0.001 | -5.207,-2.741 |
| S1 | 0.807 | 0.394 | 4.201 | 0.040 | 0.035, 1.578 |
| S2 | 0.714 | 0.215 | 10.999 | < 0.001 | 0.292, 1.135 |
| S3 | 1.493 | 0.126 | 140.126 | < 0.001 | 1.245, 1.740 |
| S4 | 1.568 | 0.349 | 20.220 | < 0.001 | 0.884, 2.251 |
| S>3 | 3.403 | 0.259 | 173.169 | < 0.001 | 2.896, 3.910 |
| S>4 | 1.697 | 0.938 | 3.269 | 0.071 | -0.143, 3.536 |