Table 2 Incidence rates of positive resection margin and odds ratios in univariate and multivariate analysis. OR: odds ratio; CI: confidence interval
Number of positive resection margin (Incidence rate) | Univariate OR (95% CI) | P-value | Multivariate OR (95% CI) | P-value | |
|---|---|---|---|---|---|
Neoadjuvant chemotherapy | |||||
No | 42 (1.6%) | 1.0 | 1.0 | ||
Yes | 7 (5.4%) | 3.5 (1.5–8.0) | 0.002 | 0.7 (0.2–1.9) | 0.593 |
Remnant cancer | |||||
No | 43 (1.6%) | 1.0 | 1.0 | ||
Yes | 6 (8.1%) | 5.41 (2.2–13.1) | < 0.001 | 4.7 (1.6–13.3) | 0.003 |
Esophageal invasion | |||||
No | 41 (1.5%) | 1.0 | 1.0 | ||
Yes | 8 (7.8%) | 5.42 (2.4–11.8) | < 0.001 | 6.3 (2.45–16.5) | < 0.001 |
Tumor size | |||||
< 80 mm | 15 (0.6%) | 1.0 | 1.0 | ||
≥ 80 mm | 34 (10.4%) | 18.60 (10.01–34.56) | < 0.001 | 3.9 (1.78–8.7) | 0.001 |
Histopathological type | |||||
Differentiated | 5 (0.4%) | 1.0 | 1.0 | ||
Undifferentiated | 44 (2.9%) | 7.44 (2.9–18.8) | < 0.001 | 3.6 (1.3–10.0) | 0.012 |
Macroscopic Type | |||||
Other than Type4 | 25 (0.9%) | 1.0 | 1.0 | ||
Type4 | 24 (19.2%) | 25.02 (13.8–45.3) | < 0.001 | 3.7 (1.7–8.0) | 0.001 |
pT category | |||||
T1–3 | 9 (0.4%) | 1.0 | 1.0 | ||
T4 | 40 (7.1%) | 18.6 (8.9–38.6) | < 0.001 | 4.6 (1.9–10.9) | < 0.001 |