Table 4. Univariate analysis of the CRM positivity.
| Patients characteristics | CRM positivity |
P value | |
|---|---|---|---|
| n=120 | CRM positivity | ||
| Sex | 0.478 | ||
| Male | 90 | 7 | |
| Female | 30 | 3 | |
| Levator involvement | 1 | ||
| Involved | 35 | 3 | |
| No involved | 85 | 7 | |
| NACTRT | 0.689 | ||
| Yes | 97 | 9 | |
| No | 21 | 1 | |
| Minimally invasive vs. open | 0.818 | ||
| Open | 70 | 7 | |
| Laparoscopy | 46 | 3 | |
| Robotic | 4 | 0 | |
| Type of surgery | 0.512 | ||
| Conventional APER | 78 | 7 | |
| Extralevator APER | 42 | 3 | |
| pT group | 0.064 | ||
| pTx/1/2 | 66 | 1 | |
| pT3/4 | 54 | 9 | |
CRM, circumferential resection margin; NACTRT, neoadjuvant chemoradiotherapy; APER, abdominoperineal resection; pT, pathological tumor stage.