Table 2.
Univariate and multivariate Cox regression analyses associated of factors with 3-year OS before PSM (n=921).
| Variables | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|
| HR (95% CI) | P | HR (95% CI) | P | |
| TME quality (Grade C, Grade B vs. Grade A) | 1.702 (1.114~2.600) | 0.014 | 1.691 (1.133~2.522) | 0.010 |
| Surgery method (Laparoscopic vs. Open) | 1.506 (0.884~2.565) | 0.132 | ||
| Gender (Female vs. Male) | 0.589 (0.346~1.002) | 0.051 | 0.583 (0.344~0.987) | 0.045 |
| Age (>60 vs. ≤60 years) | 1.329 (0.827~2.136) | 0.240 | ||
| BMI (>25 vs. ≤25 kg/m2) | 0.925 (0.524~1.633) | 0.788 | ||
| ASA score ((III, II vs. I) | 1.008 (0.622~1.634) | 0.975 | ||
| CEA (>5 vs. ≤5 ng/ml) | 1.307 (0.729~2.341) | 0.368 | ||
| CA19-9 (>37 vs. ≤37 U/ml) | 2.289 (0.906~5.782) | 0.080 | 2.510 (1.044~6.035) | 0.040 |
| Distance to the anal verge (mm) | 0.981 (0.965~0.999) | 0.033 | 0.982 (0.968~0.996) | 0.013 |
| Neoadjuvant chemoradiotherapy (Yes vs. No) | 1.967 (1.100~3.520) | 0.023 | 1.863 (1.054~3.290) | 0.032 |
| Sphincter preservation (Yes vs. No) | 1.059 (0.577~1.941) | 0.854 | ||
| Central group lymph nodes status (Positive vs. Negative) | 2.579 (0.826~8.051) | 0.103 | 3.010 (1.001~9.053) | 0.050 |
| pT stage (T4, T3, T2, T1 vs. T0/Tis) | 1.731 (1.115~2.687) | 0.014 | 1.356 (1.055~1.742) | 0.017 |
| pN stage (N+ vs. N0) | 5.610 (1.595~19.734) | 0.007 | 2.359 (1.441~3.862) | 0.001 |
| pTNM stage (III, II, I vs. 0) | 0.543 (0.239~1.235) | 0.145 | ||
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.