Cut-off values | χ2 | Hazards ratio (95% CI) | P value |
---|---|---|---|
1 vs. ≥2 | 2.758 | 1.457 (0.932-2.278) | 0.099 |
2 ≤ vs. ≥3 | 5.706 | 1.599 (1.084-2.359) | 0.018 |
3 ≤ vs. ≥4 | 4.042 | 1.486 (1.008-2.191) | 0.046 |
4 ≤ vs. ≥5 | 8.854 | 1.804 (1.209-2.692) | 0.004 |
5 ≤ vs. ≥6 | 19.610 | 2.542 (1.658-3.898) | <0.001 |
6 ≤ vs. ≥7 | 20.903 | 2.820 (1.774-4.482) | <0.001 |
7 ≤ vs. ≥8 | 15.544 | 2.269 (1.597-4.330) | <0.001 |
8 ≤ vs. ≥9 | 6.543 | 2.070 (1.171-3.660) | 0.012 |
9 ≤ vs. ≥10 | 6.696 | 2.189 (1.191-4.023) | 0.012 |
10 ≤ vs. ≥11 | 2.698 | 1.766 (0.888-3.514) | 0.105 |