Table 3.
Univariate and multivariate analysis of factors contributing to UOS.
| Parameter | TDC (N=332) | UOS (n=106) | Univariate Analysis | Multivariate Analysis | ||
|---|---|---|---|---|---|---|
| OR | 95% CI | P value | ||||
| Age (>50 years) | 155 (46.7%) | 68 (64.1%) | 0.001 | 2.1 | 1.15-3.78 | 0.015 |
|
| ||||||
| Age (>60 years) | 97 (29.2%) | 42 (39.6%) | 0.055 | |||
|
| ||||||
| Age (> 70 years) | 35 (10.5%) | 18 (17.0%) | 0.088 | |||
|
| ||||||
| Female gender | 269 (81.0%) | 78 (73.6%) | 0.129 | |||
|
| ||||||
| BMI ≥ 30 Kg/m2 | 153 (46.1%) | 52 (49.0%) | 0.655 | |||
|
| ||||||
| BMI ≥ 35 Kg/m2 | 70 (21.1%) | 22 (20.7%) | 1.000 | |||
|
| ||||||
| BMI ≥ 40 Kg/m2 | 19 (5.7%) | 9 (8.5%) | 0.361 | |||
|
| ||||||
| ASA 3 | 15 (4.5%) | 7 (6.6%) | 0.443 | |||
|
| ||||||
| Mean operation time (mins) | 64.9±21.6 | 82.5±35.4 | <0.001 | 1.0 | 1.00-1.04 | 0.017 |
|
| ||||||
| Length of procedure (>90 minutes) |
43 (12.9%) | 38 (35.8%) | <0.001 | |||
|
| ||||||
| OTC performed | 84 (25.3%) | 38 (35.8%) | 0.046 | |||
|
| ||||||
| OTCs in those who had > 90 minutes procedure |
15 (4.5%) | 16 (15.1%) | <0.001 | |||
|
| ||||||
| Drain insertion | 0 (0.0%) | 26 (24.5%) | <0.001 | |||
|
| ||||||
| Time leaving recovery (after 18:30 hrs) |
6 (1.8%) | 24 (22.6%) | <0.001 | 15.1 | 5.41-42.34 | <0.001 |
|
| ||||||
| Timing of procedure (PM list) | 165 (49.7%) | 74 (69.8%) | <0.001 | 2.4 | 1.30-4.61 | 0.005 |
|
| ||||||
| Intra-operative complications (bowel injury, etc) | 0 (0.0%) | 1 (0.9%) | 0.242 | |||
|
| ||||||
| Immediate post-operative complications (urine retention, bleeding) | 0 (0.0%) | 7 (6.6%) | <0.001 | |||
|
| ||||||
| Operations by trainee (Registrar) | 60 (18.1%) | 12 (11.3%) | 0.131 | |||