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Comparison of median survival times of chemotherapy versus surgery
| Treatment | Case No. (Ref No.) | Median survival (month) | P | |
| Experimental group | Control group | |||
| Chemotherapy | 103 (12) | 11.0 | 4.3 | 0.19 |
| 4,214 (13) | 9.4 | 8.6 | <0.0001 | |
| Surgery | 101 (14) | 11.0 | Not provided | <0.001 |
