Table 4.
Univariate analysis and multivariate Cox regression analysis for OS and DFS
| Univariate analysis | Multivariate analysis | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Variable | 5-year OS (%) | p | 5-year DFS (%) | p | 5-year OS | 5-year DFS | ||||
| OR | 95% CI | p | OR | 95% CI | p | |||||
| Age, ≥ 65/ < 65 | 83/96 | 0.1 | 80.6/85.1 | 0.92 | – | – | – | – | – | – |
| Sex, M/F | 89.2/93.3 | 0.26 | 85.5/82.3 | 0.85 | – | – | – | – | – | – |
| ASA, I–II/III–IV | 100/89.2 | 0.33 | 85/69.6 | 0.37 | – | – | – | – | – | – |
| BMI, < 25/ ≥ 25 | 95.5/80.8 | 0.6 | 87.8/76.4 | 0.57 | ||||||
| Tumor location, high-middle/low | 91.4/87.6 | 0.5 | 85/77.5 | 0.47 | – | – | – | – | – | – |
| Neadjuvant treatment, yes/no | 92.8/88.8 | 0.7 | 80.1/87.9 | 0.35 | ||||||
| Type of surgery, ARR/APR | 91.5/85.7 | 0.77 | 82.9/85.7 | 0.48 | – | – | – | – | – | – |
| Diverting ostomy, yes/no | 86.3/95 | 0.1 | 80/87.9 | 0.35 | – | – | – | – | – | – |
| Conversion, yes/no | 90/100 | 0.5 | 80/83.6 | 0.42 | ||||||
| Complications, yes/no | 96.3/88.5 | 0.78 | 75.9/86 | 0.21 | – | – | – | – | – | – |
| Reoperation, yes/no | 90.5/100 | 0.73 | 83/100 | 0.61 | – | – | – | – | – | – |
| TNM stage, I–II/III | 96.1/71.6 | 0.04 | 94.6/51.6 | < 0.0001 | 0.1 | –0.3 to 0.6 | 0.47 | 1.2 | 0.47–2 | 0.02 |
| Lymph nodes harvesteda, ≤ 11/ > 11 | 92.6/86.6 | 0.3 | 83.5/82.4 | 0.23 | – | – | – | – | – | – |
| CRM, positive/negative | 33/95.7 | < 0.0001 | 33.3/88 | < 0.0001 | 7.6 | 6.3–9 | < 0.0001 | 3.7 | 1.4–6.1 | 0.02 |
|
TME quality, complete/near complete-incomplete |
98/21.4 | < 0.0001 | 93.3/14.3 | < 0.0001 | 1.8 | 1.34–2.25 | < 0.0001 | 3.9 | 3.1–4.7 | < 0.0001 |
aThe mean values of lymph nodes harvested was used for the univariate and multivariate analysis
OS overall survival, DFS disease-free survival, OR odds ratio, CI confidence interval