Table 4.
Univariate and multivariate Cox regression analyses associated of factors with 3-year OS after PSM (n=537).
| Variables | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|
| HR (95% CI) | P | HR (95% CI) | P | |
| TME quality (Grade B/C vs. Grade A) | 1.862 (1.012~3.427) | 0.046 | 1.881 (1.035~3.416) | 0.038 |
| Surgery method (Laparoscopic vs. Open) | 1.371 (0.720~2.610) | 0.336 | ||
| Gender (Female vs. Male) | 0.814 (0.432~1.535) | 0.526 | ||
| Age (>60 vs. ≤60 years) | 1.350 (0.739~2.466) | 0.329 | ||
| BMI (>25 vs. ≤25 kg/m2) | 0.862 (0.402~1.847) | 0.702 | ||
| ASA score ((III, II vs. I) | 0.747 (0.394~1.418) | 0.373 | ||
| CEA (>5 vs. ≤5 ng/ml) | 1.344 (0.660~2.736) | 0.415 | ||
| CA19-9 (>37 vs. ≤37 U/ml) | 2.802 (0.982~7.992) | 0.054 | 2.769 (1.060~7.235) | 0.038 |
| Distance to the anal verge (mm) | 0.986 (0.965~1.008) | 0.201 | ||
| Neoadjuvant chemoradiotherapy (Yes vs. No) | 2.231 (1.059~4.701) | 0.035 | ||
| Sphincter preservation (Yes vs. No) | 1.070 (0.522~2.191) | 0.854 | ||
| Central group lymph nodes status (Positive vs. Negative) | 3.118 (0.912~10.665) | 0.070 | 4.324 (1.420~13.167) | 0.010 |
| pT stage (T4, T3, T2, T1 vs. T0/Tis) | 1.558 (0.905~2.683) | 0.110 | ||
| pN stage (N+ vs. N0) | 4.763 (0.948~23.921) | 0.058 | 2.372 (1.299~4.330) | 0.005 |
| pTNM stage (III, II, I vs. 0) | 0.591 (0.214~1.637) | 0.312 | ||
Abbreviations: PSM, propensity-score matching; OS, overall survival; BMI, body mass index; ASA, American Society of Anesthesiologists Score; CEA, circumferential resection margin; CA19-9, carbohydrate antigen 19-9.