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Characteristics of patients in the chemoradiation (CR) and surgery-first (SF) groups
| CR group | SF group | P-value | |
|---|---|---|---|
| Number of patients | 88 | 85 | – |
| Median age, years | 65 (39–81) | 64 (37–79) | 0.195 |
| CA19-9 > 350 UI/ml | 14 (16%) | 13 (15%) | 1.000 |
| Preoperative venous involvementa | 21 (24%) | 19 (22%) | 0.858 |
| Number of resected patients | 38 (43%) | 67 (79%) | <0.001 |
Preoperative venous involvement is defined by the tumour surrounding <180 degrees of the portal vein or superior mesenteric vein, regardless of length
