Table 2.
A Comparison of Consultant and Trainee Total and Intraoperative Phase Operating Times for Cases Matched by Modified G10 (mG10) Score.
| Matched mG10=0 Trainee (n=6) | Consultant (n=11) Median, IQR (range) | Mann-Whitney U | |
|---|---|---|---|
| Total operative time | 43.2, 23.9 (30.8-63.7) | 32.2, 13.4 (21.5-61.3) | 22 (p=0.301) |
| Port insertion/exposure | 6.55, 4.83 (4.23-11.8) | 6, 2.55 (3.78-20.8) | 27 (p=0.590) |
| Dissection of HCT | 11.5, 10.71 (5.5-24.2) | 9.48, 6.05 (3.07-13.6) | 27 (p=0.590) |
| Ligation/division of cystic structures | 3.3, 2.55 (1.47-5.95) | 2.58, 1.99 (1.38-4.77) | 25 (p=0.462) |
| Gallbladder dissection | 12.9, 15 (9.13-47) | 14.1, 9.18 (7.2-25.5) | 30 (p=0.807) |
| Specimen out/closure | 2.12, 2.68 (0.033-2.69) | 2.73, 1.79 (1.4-7.2 | 19 (p=0.180) |
| Matched mG10=1 | |||
| Trainee (n=28) | Consultant (n=26) | Mann-Whitney U | |
| Median, IQR (range) | |||
| Total operative time | 47.4.6, 12.6 (26.5-73.6) | 30.9, 20.6 (19-80.8) | 180 (p=0.001) |
| Port insertion/exposure | 7.62, 4.05 (2.4-17.4) | 6.07, 2.55 (3.92-9.92) | 262.5 (p=0.076) |
| Dissection of HCT | 11.6, 8.45 (4.2-23.9) | 5.38, 4.46 (1.22-29.3) | 189.5 (p=0.002) |
| Ligation/division of cystic structures | 3.06, 3.26 (1.62-18.7) | 2.96, 4.14 (0.983-24.9) | 354 (p=0.871) |
| Gallbladder dissection | 19.5, 11.8 (4.87-23.5) | 11.8, 4.22 (5.25-21.9) | 354 (p=0.871) |
| Specimen out/closure | 4.26, 3.55 (0.833-18.6) | 4.32, 3.57 (1.83-19.1) | 347.5 (p=0.780) |
| Matched mG10=2 | |||
| Trainee (n=18) | Consultant (n=29) | Mann-Whitney U | |
| Median, IQR (range) | |||
| Total operative time | 50.1, 17.6 (22.5-75.6) | 34.8, 1.2 (16.8-72.7) | 99 (p<0.001) |
| Port insertion/exposure | 8.08, 5.57 (4.23-14.5) | 6.15, 2.09 (3.22-15) | 163.5 (p=0.032) |
| Dissection of HCT | 15.7, 13.9 (3.45-32.7) | 6.98, 5.23 (3.37-3.1) | 105 (p<0.001) |
| Ligation/division of cystic structures | 3.18, 2.57 (1.4-20) | 3.1, 2.43 (0.717-15.7) | 222 (p=0.400) |
| Gallbladder dissection | 13.6, 9.5 (5.7-37.20) | 9.78, 8.9 (5.7-31) | 201 (p=0.194) |
| Specimen out/closure | 2.71, 5.34 (0.783-11.1) | 3.02, 5.73 (1.15-13.3) | 236 (p=0.591) |
| Matched mG10=3 | |||
| Trainee (n=7) | Consultant (n=7) | Mann-Whitney U | |
| Median, IQR (range) | |||
| Total operative time | 55.4, 33 (38.5-84.5) | 45.9, 30.8 (18.7-92.6) | 20 p=0.620 |
| Port insertion/exposure | 9.13, 3.93 (5.33-12.2) | 10.3, 423 (5.58-12.1) | 19 p=0.535 |
| Dissection of HCT | 18.3, 15.9 (13.3-32.7) | 11.4, 11.9 (3.6-29.3) | 11 p=0.097 |
| Ligation/division of cystic structures | 5.58, 5.55 (2.37-13.1) | 5.53, 13.95 (0.633-22.6) | 24 >0.999 |
| Gallbladder dissection | 15.3, 16.6 (10.3-34.8) | 13.4, 12.9 (4.2-25.7) | 21 p=0.710 |
| Specimen out/closure | 4.82, 4.48 (1.68-12.9) | 7.15, 5.92 (1.62-9.52) | 24 p=>0.999 |
| Matched mG10=4 | |||
| Trainee (n=3) | Consultant (n=16) | Mann-Whitney U | |
| Median, IQR (range) | |||
| Total operative time | 59.2, 14.5 (46-60.5) | 48.1, 24.8 (32.2-95.3) | 21 p=0.792 |
| Port insertion/exposure | 8.42, 3.47 (7.83-11.3) | 11.5, 6.55 (5.57-28.7) | 14 p=0.303 |
| Dissection of HCT | 15, 10.6 (11.3-21.9) | 11, 7.36 (4.48-22.3) | 12 p=0.210 |
| Ligation/division of cystic structures | 4.37, 4.13 (2.5-6.63) | 3.07, 7.63 (0.783-23.4) | 23 p=0.957 |
| Gallbladder dissection | 24.4, 19 (10.2-19) | 15.3 12.1 (3.73-31.7) | 19 p=0.633 |
| Specimen out/closure | 4.2, 2.33 (2.97-5.3) | 4.38, 4.98 (1.08-13.3) | 22 p-0.875 |
Statistical significance indicated in bold.