Table 1.
Patients demographics and comparisons of learning curve-related variables
| Overall | Group A | Group B | Group C | Group D | P value | |
|---|---|---|---|---|---|---|
| Age (years) | 45.1 ± 16.1 | 43.8 ± 17.3 | 44.9 ± 10.8 | 44.6 ± 15.2 | 47.1 ± 17.8 | 0.297 |
| Gender (M/F) | 67/53 | 14/16 | 14/16 | 20/10 | 19/11 | 0.245 |
| BMI (kg/m2) | 23.38 ± 3.2 | 23.58 ± 3.3 | 23.02 ± 3.4 | 23.63 ± 3.1 | 23.30 ± 2.9 | 0.874 |
| Previous history of AS | 16 | 5 | 4 | 3 | 4 | 0.901 |
| Operation time (minutes) | 59.9 ± 19.9 | 67.0 ± 23.9 | 61.7 ± 17.9 | 60.4 ± 17.5 | 50.6 ± 16.8 | 0.012 |
| Additional port insertion | 4 | 4 | 0 | 0 | 0 | 0.006 |
| Time to ROI (days) | 1.5 ± 0.7 | 1.5 ± 0.8 | 1.6 ± 0.8 | 1.5 ± 0.6 | 1.6 ± 0.8 | 0.966 |
| Hospitalization (days) | 5.1 ± 2.5 | 5.3 ± 2.7 | 5.2 ± 2.3 | 4.9 ± 1.9 | 4.8 ± 2.0 | 0.418 |
| Complications | 18 | 5 | 5 | 5 | 3 | 0.853 |
| wound problem | 11 | 3 | 3 | 4 | 1 | 0.230 |
| intraabdominal infection | 4 | 1 | 1 | 1 | 1 | 1.000 |
| ileus | 3 | 1 | 1 | 0 | 1 | 0.890 |
Abbreviations: M/F male/female, BMI body mass index, AS abdominal surgery, ROI resumption of oral intake