Table 2 Univariable and multivariable cox regression analysis of OS after treatment
| Variable and category | Univariable analysis | Multivariable analysis | ||
|---|---|---|---|---|
| HR | P value | HR | P value | |
| Age (years) | ||||
| <60 | 26.5 (24.9, 28.1) | <0.05 | N/A | 0.594 |
| ≥60 | 20.3 (18.2, 22.3) | |||
| Sex | ||||
| Female | 26.0 (24.8, 27.2) | <0.05 | N/A | 0.266 |
| Male | 15.0 (13.6, 16.4) | |||
| Tumor size | ||||
| <4 cm | 29.0 (26.3, 31.7) | <0.05 | 13.5 (2.6, 70.6) | 0.002 |
| ≥4 cm | 17.0 (13.9, 20.1) | |||
| Chemotherapy before IRE | ||||
| Yes | 30.0 (26.6, 33.4) | <0.05 | 5.1 (1.4, 17.9) | 0.012 |
| No | 17.5 (13.8, 21.2) | |||
| Change in CA19-9 level 3 mo after treatment | ||||
| Decrease or no change | 26.5 (25.3, 27.7) | <0.05 | N/A | 0.116 |
| Increase | 14.5 (12.6, 16.4) | |||
| Location progression | ||||
| ≥6 mo or no local progression | 24.0 (20.9, 27.0) | <0.05 | 0.2 (0.1, 0.5) | 0.001 |
| <6 mo | 11.0 (8.9, 13.1) | |||
