Table 3. Comparison between Large and Small Centers Performing UC Operations.
| Variable | Large center (sample size >50) | Small center (sample size ≤50) | P-value | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Available centers | Available sample size | No. of cases | Average rate (mean±SD, %) | Available centers | Available sample size | No. of cases | Average rate (mean±SD, %) | ||
| Emergency operation | NA | NA | NA | NA | 8 | 85 | 226 | 34.5±23.8 | NA |
| Surgical indications | 2 | 215 | 82 | 40.0±32.0 | 19 | 430 | 144 | 34.1±27.1 | 0.775 |
| Postoperative complications | 6 | 351 | 62 | 19.4±15.6 | 17 | 374 | 114 | 33.7±3.15 | 0.010a |
| Reoperation within 30 days | 2 | 175 | 0 | 0 | 20 | 446 | 51 | 13.8±24.4 | 0.443 |
| In-hospital mortality | 4 | 353 | 13 | 0.75±1.5 | 24 | 543 | 25 | 4.4±0.1 | <0.001a |
aP<0.05.
NA, not available.