Table 3.
Multivariable logistic regression analysis of risk factors for short‐term treatment failure and emergency surgery
| Odds ratio | P | |
|---|---|---|
| Treatment failure | ||
| Age (per year) | 1·001 (0·98, 1·02) | 0·955 |
| BMI (per kg/m2) | 0·94 (0·89, 0·997) | 0·041 |
| Alcohol consumption | 0·63 (0·36, 1·10) | 0·099 |
| Co‐morbidity | 1·40 (0·85, 2·29) | 0·183 |
| NSAID prescription | 0·58 (0·21, 1·57) | 0·242 |
| Nausea | 1·32 (0·83, 2·12) | 0·245 |
| C‐reactive protein (mg/l) | 1·001 (0·998, 1·003) | 0·656 |
| Abscess ≥ 3 cm | 2·05 (1·09, 3·86) | 0·027 |
| Percutaneous drainage | 1·47 (0·81, 2·68) | 0·185 |
| Emergency surgery | ||
| History of abdominal surgery | 2·05 (1·04, 4·05) | 0·038 |
| Rebound tenderness | 2·03 (0·98, 4·21) | 0·058 |
| Abscess ≥ 5 cm | 2·96 (1·08, 8·13) | 0·036 |
| Percutaneous drainage | 1·29 (0·56, 2·99) | 0·554 |
Values in parentheses are 95 per cent confidence intervals. NSAID, non‐steroidal anti‐inflammatory drug.