Table 3. Factors Associated With Operating Room Time.
| Variable | Category/value | Mean predicted operative time, min | Difference from baseline category/value |
|---|---|---|---|
| Age, y | 40 | 426.3 | 0 |
| 50 | 429.1 | 2.8 | |
| 60 | 424.8 | −1.5 | |
| 70 | 413.7 | −12.6 | |
| 80 | 396.3 | −30.0 | |
| EBL, mL | 50 | 366.0 | 0 |
| 150 | 397.9 | 31.9 | |
| 250 | 413.7 | 47.7 | |
| 400 | 428.8 | 62.8 | |
| 1000 | 459.8 | 93.8 | |
| Lymph nodes, No. | 10 | 425.8 | 0 |
| 20 | 418.9 | −6.9 | |
| 30 | 412.2 | −13.6 | |
| 40 | 405.5 | −20.3 | |
| 50 | 399.0 | −26.8 | |
| Clamp | No | 407.9 | 0 |
| Yes | 441.2 | 33.3 | |
| Concomitant procedure | No | 412.2 | 0 |
| Yes | 447.4 | 35.5 | |
| Pathology | PDA | 422.5 | 0 |
| AMP | 401.5 | −21.0 | |
| IPMN | 393.1 | −29.4 | |
| NET | 400.6 | −21.9 | |
| CCA | 421.8 | −0.7 | |
| Other | 412.5 | −10.0 | |
| Case No. if generation 1 | 1 | 668.8 | 251.8 |
| 10 | 599.9 | 182.9 | |
| 50 | 492.8 | 75.8 | |
| 90 | 436.4 | 19.4 | |
| 150 | 379.8 | −37.2 | |
| 225 | 330.7 | −86.3 | |
| Case No. if generation 2 | 1 | 417.0 | 0 |
| 10 | 405.9 | −11.1 | |
| 50 | 386.6 | −30.4 | |
| 90 | 375.1 | −41.9 | |
| Case No. if generation 3 | 1 | 364.0 | −53.0 |
| 10 | 355.9 | −61.1 |
Abbreviations: AMP, ampullary; CCA, cholangiocarcinoma; EBL, estimated blood loss; IPMN, intrapapillary mucinous neoplasm; NET, pancreatic neuroendocrine tumor; PDA, pancreatic ductal adenocarcinoma.