Table 2. Multivariate regression for overall survival by Cox's proportional hazards regression.
| Parameter | P-value | Relative hazard | 95% CI for relative hazard |
|---|---|---|---|
| Preoperative CDX2 pCTCs (>21.5 and ⩽21.5) | 0.003 (S) | 9.274 | 4.372–12.795 |
| Sex (male vs female) | 0.651 (NS) | — | — |
| Age (>71 vs ⩽71 years) | 0.949 (NS) | — | — |
| pT category (T1+T2 vs T3+T4) | 0.752 (NS) | — | — |
| Differentiation (well vs poor) | 0.816 (NS) | — | — |
| Lymph node involvement (presence vs absence) | 0.022 (S) | 6.293 | 2.749–9.271 |
Abbreviations: CI=confidence interval; NS=non-significant; pCTC=positive circulating tumour cell; S=significant; TNM=tumour node metastasis.