Surgical characteristics: comparison between interval debulking surgery versus primary tumor reductive surgery. Data are numbers (%) unless indicated otherwise
| Characteristic | Interval debulking surgery n=366 | Primary tumor reductive surgery n=552 | P value |
| Estimated blood loss, mL (median (range)) | 300 (15–4600) | 500 (0–8000) | <0.001 |
| Intraoperative transfusion* | 0.001 | ||
| Yes | 108 (31.0) | 180 (42.4) | |
| No | 241 (69.1) | 245 (57.7) | |
| Total operative time, minutes (median (range)) | 185 (28–481) | 228 (37–819) | <0.001 |
| Tumor residual† | 0.005 | ||
| >1 cm, suboptimal | 65 (18.0) | 110 (22.2) | |
| >0.5 cm, <1 cm, optimal | 61 (16.9) | 94 (19.0) | |
| <0.5 cm, optimal | 45 (12.4) | 89 (18.0) | |
| No gross disease, optimal | 191 (52.8) | 203 (40.9) |
*Missing data from 144 patients.
†Missing data from 60 patients.