Table 1.
Characteristics stratified by the completion of the learning curve (CLC) cutoff
| Variables | Total (n = 104) | CLC cutoff | t/χ 2 | P | |
|---|---|---|---|---|---|
| Group A (n = 37) | Group B (n = 67) | ||||
| Preoperative characteristics | |||||
| Sex, no. (%) | |||||
| Male | 18/104 (17.3) | 7/37 (18.9) | 11/67 (16.4) | 0.10 | 0.75 |
| Female | 86/104 (82.7) | 30/37 (81.1) | 56/67 (83.6) | ||
| Age, mean (SD), months | 35.9 (24.3) | 40.7 (26.1) | 33.2 (23.0) | 1.52 | 0.13 |
| Comorbidity, no. (%) | |||||
| None | 101/104 (97.1) | 37/37 (100) | 64/67 (95.5) | –a | 0.55 |
| One or more | 3/104 (2.9) | 0/37 (0) | 3/67 (4.5) | ||
| Disease duration, mean (SD), days | 226.8 (345.2) | 291.8 (449.1) | 190.9 (268.8) | 2.06 | 0.16 |
| Type of cyst, no. (%) | |||||
| 1a | 64/104 (61.5) | 23/37 (62.2) | 41/67 (61.2) | ||
| 1c | 25/104 (24.0) | 8/37 (21.6) | 17/67 (25.4) | 0.27 | 0.87 |
| 4a | 15/104 (14.4) | 6/37 (16.2) | 9/67 (13.4) | ||
| Size of cyst, mean (SD), cm | 3.4 (3.0) | 3.3 (2.1) | 3.4 (3.4) | 0.09 | 0.93 |
| Abdominal pain, no. (%) | |||||
| No | 28/104 (26.9) | 7/37 (18.9) | 21/67 (31.3) | 1.87 | 0.17 |
| Yes | 76/104 (73.1) | 30/37 (81.1) | 46/67 (68.7) | ||
| Jaundice, no. (%) | |||||
| No | 75/104 (72.1) | 30/37 (81.1) | 45/67 (67.2) | 2.30 | 0.13 |
| Yes | 29/104 (27.9) | 7/37 (18.9) | 22/67 (32.8) | ||
| Jaundice subsided, no. (%) | |||||
| No | 13/104 (12.5) | 4/37 (10.8) | 9/67 (13.4) | 0.15 | 0.70 |
| Yes | 91/104 (87.5) | 33/37 (89.2) | 58/67 (86.6) | ||
| Intraoperative results | |||||
| Operation time, mean (SD), min | 278.5 (81.7) | 352.2 (80.5) | 240.5 (50.6) | 8.37 | <0.001 |
| Excision time, mean (SD), min | 117.6 (47.7) | 144.8 (60.4) | 102.4 (29.9) | 4.77 | <0.001 |
| Anastomosis time, mean (SD), min | 50.9 (27.2) | 74.1 (29.6) | 38.0 (14.2) | 8.36 | <0.001 |
| Blood loss, mean (SD), ml | 12.0 (18.9) | 14.2 (18.0) | 10.7 (19.4) | 0.88 | 0.38 |
| Adhesion score, no. (%) | |||||
| Low | 48/104 (46.2) | 17/37 (45.9) | 31/67 (46.3) | 2.50 | 0.29 |
| Middle | 23/104 (22.1) | 11/37 (29.7) | 12/67 (17.9) | ||
| High | 33/104 (31.7) | 9/37 (24.3) | 24/67 (35.8) | ||
| Transfusion, no. (%) | |||||
| No | 100/104 (96.2) | 34/37 (91.9) | 66/67 (98.5) | –a | 0.13 |
| Yes | 4/104 (3.8) | 3/37 (8.1) | 1/67 (1.5) | ||
| Conversions, no. (%) | |||||
| No | 97/104 (93.3) | 33/37 (89.2) | 64/67 (95.5) | –a | 0.24 |
| Yes | 7/104 (6.7) | 4/37 (10.8) | 3/67 (4.5) | ||
| Postoperative outcomes | |||||
| Hospital stay, mean (SD), days | 8.4 (3.1) | 9.4 (3.8) | 7.8 (2.5) | 2.52 | 0.01 |
| Complications, no. (%) | |||||
| No | 98/104 (94.2) | 32/37 (86.5) | 66/67 (98.5) | –a | 0.02 |
| Yes | 6/104 (5.8) | 5/37 (13.5) | 1/67 (1.5) | ||
CLC completion of the learning curve
aFisher’s exact test