Table 3.
Factors predicting operative time over 75th percentile or conversion to open surgery (training set, N = 679)
| Parameters | OR ± SE | p-value | Step exclusion |
|---|---|---|---|
| Gender (Female vs. male) | 1.87 ± 0.39 | 0.003 | Final |
| Age (for each year) | 0.98 ± 0.01 | 0.117 | 3rd |
| BMI (for each Kg/m2) | 1.07 ± 0.02 | < 0.001 | Final |
| ASA score (for each class) | 1.33 ± 0.21 | 0.074 | 5th |
| Previous surgery | 1.56 ± 0.32 | 0.032 | Final |
| Symptoms (No vs. yes) | 0.72 ± 0.15 | 0.113 | 4th |
| Diagnosis | 2nd | ||
| Non-functioning benign lesion | Referent | ||
| Functioning benign lesion | 1.16 ± 0.36 | 0.619 | |
| Pheochromocytoma | 1.55 ± 0.54 | 0.217 | |
| Malignant lesion | 1.43 ± 0.60 | 0.400 | |
| Side | Final | ||
| Right | Referent | ||
| Left | 1.01 ± 0.21 | 0.929 | |
| Bilateral | 15.15 ± 11.26 | < 0.001 | |
| Size (for each cm) | 1.15 ± 0.05 | 0.002 | Final |
| Type of surgeon (Junior vs. Senior) | 0.98 ± 0.03 | 0.580 | 1st |
| Cumulative sum of procedures | 0.99 ± 0.01 | < 0.001 | Final |
| Extended resection planned (No vs. yes) | 12.24 ± 10.50 | 0.003 | Final |
| Others surgical procedures planned (No vs. yes) | 4.67 ± 2.75 | 0.009 | Final |
OR odds ratio, SE standard error, BMI Body Mass Index, ASA American Society of Anesthesiologists score