Table 3.
Multivariate Analysis: Lewis Antigen Negative v CA 19-9 ≤ 90 v CA 19-9 > 90
| Adjustment Variable | Adjusted HR | 95% CI | P* |
|---|---|---|---|
| Gemcitabine v FU | 1.21 | 0.96 to 1.52 | .11 |
| CA 19-9 | |||
| ≤ 90 | — | — | — |
| > 90 | 3.34 | 2.4 to 4.64 | < .0001 |
| Lewis antigen negative | 1.22 | 0.94 to 1.58 | .13 |
| Nodal involvement | |||
| No v yes | 1.46 | 1.12 to 1.94 | .004 |
| Tumor diameter, cm | |||
| < 3 v ≥ 3 | 1.11 | 0.87 to 1.42 | .39 |
| Surgical margin status | |||
| Negative | — | — | — |
| Positive | 1.12 | 0.87 to 1.47 | .40 |
| Unknown | 0.92 | 0.68 to 1.24 | .56 |
Abbreviations: HR, hazards ratio; FU, fluorouracil.
*
P from χ2 test using the Cox proportional hazards model.