Table 3.
Univariable and multivariable logistic regression analysis of predictors for prolonged hospital stay (>2 days)
| Variable | Univariate analysis, OR (95% CI) | P-value | Multivariate analysis, OR (95% CI) | P-value |
|---|---|---|---|---|
| Age (yr) | ||||
| > 60 | 2.06 (0.55–7.66) | 0.281 | NA | NA |
| > 70 | 4.70 (0.40–54.84) | 0.217 | NA | NA |
| Female sex | 2.63 (0.94–7.42) | 0.067 | NA | NA |
| Body mass index, > 25 kg/m2 | 1.11 (0.33–3.77) | 0.858 | NA | NA |
| ASA PS classification | 3.22 (0.95–11.28) | 0.061 | NA | NA |
| Operative time, > 60 min | 7.62 (2.01–28.81) | 0.003 | 5.95 (1.09–32.23) | 0.039 |
| Complicated appendicitis on initial CT | 3.89 (1.35–11.25) | 0.012 | 4.11 (0.93–18.07) | 0.061 |
| Preoperative WBC, > 12,000/μL | 0.50 (0.18–1.38) | 0.175 | - | - |
| Preoperative CRP, > 10 mg/L | 3.63 (0.56–23.50) | 0.176 | - | - |
| Postoperative pain score (VAS), > 4 | ||||
| At 6 hr | 4.01 (1.10–14.57) | 0.035 | 0.963 (0.10–9.12) | 0.963 |
| At 12 hr | 5.13 (1.32–20.02) | 0.018 | 11.58 (0.98–136.19) | 0.051 |
| Operation type (CLA vs. SILA) | 3.00 (1.03–8.70) | 0.043 | 6.49 (1.46–28.86) | 0.014 |
OR, odds ratio; CI, confidence interval; NA, not available; ASA, American Society of Anesthesiologists; PS, physical status; CT, computed tomography; WBC, white blood cell; CRP, C-reactive protein; VAS, visual analogue scale; CLA, conventional laparoscopic appendectomy; SILA, single-incision laparoscopic appendectomy.