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Logistic regression analysis of pathologic response (complete or good vs moderate or minimal or no response) as the outcome variable and platelet counts (≤ vs > 300 × 109/L), carcinoembryonic antigen (≤ 5 μg/L vs > 5 μg/L) and symptoms (obstruction or pain vs bleeding or asymptomatic) at presentation as the predictor variables
| Variable | OR | 95%CI | P value |
| Platelet count | 0.15 | 0.02-0.85 | 0.03 |
| CEA | 0.04 | 0.004-0.41 | 0.006 |
| Symptoms at presentation | 4.7 | 0.39-55.8 | 0.20 |
CEA: Carcinoembryonic antigen.
