Table 3.
Risk factors for surgical failure (univariate analysis)
| Variable | HR (95% CI) | P-value |
|---|---|---|
| Male sex | 2.217 (0.652–7.544) | 0.202 |
| Age > 40 yr | 1.184 (0.378–3.704) | 0.772 |
| BMI > 24 kg/m2 | 1.167 (0.373–3.657) | 0.790 |
| ASA PS classification ≥ II | 1.412 (0.361–5.522) | 0.620 |
| Previous abdominal surgery | 1.487 (0.379–5.827) | 0.569 |
| Location of appendix | ||
| Antececal | 1 | |
| Paracecal | 0.782 (0.122–5.003) | 0.795 |
| Retrocecal | 1.706 (0.341–8.528) | 0.515 |
| Pelvis | 1.333 (0.332–5.349) | 0.685 |
| Severity of the inflammation | ||
| Early | 1 | |
| Suppurative | 2.143 (0.241–19.059) | 0.494 |
| Gangrenous | 7.333 (0.595–90.332) | 0.120 |
| Perforated | 9.167 (0.993–84.613) | 0.051 |
| Perforation | ||
| None | 1 | |
| Base | 6.375 (1.380–29.449) | 0.018 |
| Middle portion | 1.929 (0.250–14.887) | 0.529 |
| Tip | 3.306 (0.609–17.935) | 0.166 |
| Peritonitis | ||
| None | 1 | |
| Localized | 2.524 (0.747–8.524) | 0.136 |
| Generalized | 15.143 (0.854–268.52) | 0.064 |
| Fluid collection | ||
| None | 1 | |
| Minimal | 0.254 (0.057–1.124) | 0.071 |
| Moderate | 1.375 (0.358–5.285) | 0.643 |
HR, hazard ratio; CI, confidence interval; BMI, body mass index; ASA PS, American Society of Anesthesiologists physical status.