Table 2.
Laboratory test and anal manometry results
| Variable | Non-retention (n = 1,878) | Retention (n = 298) | P-value |
|---|---|---|---|
| Serum blood urea nitrogen (mg/dL) | 13.21 (10.6–15.4) | 13.84 (11.5–16.2) | 0.244 |
| ≥ 20 | 94 (5.0) | 10 (3.4) | |
| < 20 | 1,784 (95.0) | 288 (96.6) | |
| Serum creatinine (mg/dL) | 0.77 (0.6–0.9) | 0.81 (0.7–0.9) | 0.091 |
| ≥1 | 129 (6.9) | 29 (9.7) | |
| <1 | 1,749 (93.1) | 269 (90.3) | |
| Maximal resting pressure (mmHg) | 75.74 ± 11.94 | 75.33 ± 12.27 | 0.572 |
| ≥ 84 | 493 (26.3) | 83 (27.9) | |
| < 84 | 1,385 (73.7) | 215 (72.1) | |
| Maximal squeezing pressure (mmHg) | 151.20 ± 57.28 | 149.53 ± 59.63 | 0.010 |
| ≥ 150 | 833 (44.4) | 156 (52.3) | |
| < 150 | 1,045 (55.6) | 142 (47.7) |
Values are presented as median (interquartile range), number (%), or mean±standard deviation.