TABLE 2.
Clinical, laboratory and radiographic features of cohort by dichotomized LOS.
| Total | LOS ≤ 7 days | LOS > 7 days | p -value* | |
| Duration of symptoms prior to admission** | ||||
| Days of fever | 1.6 ± 1.7 | 1.3 ± 1.4 | 2.0 ± 1.9 | 0.013 |
| Days of abdominal pain | 3.54 ± 3.18 | 2.96 ± 1.93 | 4.38 ± 4.31 | 0.014 |
| Days of vomiting | 2.30 ± 1.81 | 1.96 ± 1.65 | 2.80 ± 1.93 | 0.011 |
| Days of diarrhea | 1.23 ± 1.15 | 0.82 ± 1.25 | 1.64 ± 2.35 | 0.014 |
| Days of any GI symptoms | 3.7 ± 3.2 | 3.0 ± 2.0 | 4.7 ± 4.3 | 0.004 |
| Initial Labs** | ||||
| White blood cell count (cells/L) (n = 122) | 17.1 ± 5.7 | 17.1 ± 5.2 | 17.0 ± 6.4 | 0.978 |
| Immature neutrophils (cells/uL) (n = 54) | 1551 ± 1916 | 1056 ± 1183 | 2270 ± 2506 | 0.021 |
| ESR (mm/hr) (n = 39) | 44.6 ± 30.2 | 38.79 ± 23.0 | 50.25 ± 35.5 | 0.242 |
| CRP (mg/d) (n = 60) | 13.8 ± 9.0 | 11.3 ± 8.0 | 17.0 ± 9.4 | 0.014 |
| Sodium ≤ 133 (mEq/L) (n = 122) | 22 (18.0) | 9 (12.3) | 13 (26) | 0.045 |
| Radiographic findings (US, CT, and/or MRI) (n = 107) | ||||
| Appendix size (cm) (n = 86)## | 13.3 ± 3.1 | 13.0 ± 3.1 | 13.5 ± 3.1 | 0.457 |
| Appendicolith (n = 91, %) | 53 (58.2) | 27 (54) | 26 (63.4) | 0.365 |
| Free Fluid (n = 101, %) | 84 (83.2) | 47 (82.5) | 37 (84.1) | 0.828 |
| RUQ FF (n = 100, %) | 35 (35.0) | 14 (25.5) | 21 (46.7) | 0.027 |
| RLQ FF (n = 101, %) | 76 (75.2) | 40 (71.4) | 36 (80.0) | 0.321 |
| Pelvic FF (n = 97, %) | 48 (49.5) | 27 (49.1) | 21 (50) | 0.929 |
| Complex free fluid (n = 84, %) | 39 (46.4) | 19 (41.3) | 20 (52.6) | 0.300 |
| Abscess (n = 97, %) | 33 (34.0) | 10 (18.5) | 23 (53.5) | <0.001 |
| Abscess size (cm)# (n = 33) | 5.6 ± 2.4 | 5.7 ± 2.2 | 5.5 ± 2.6 | 0.873 |
| Phlegmon (n = 92, %) | 76 (82.6) | 41 (82.0) | 35 (83.3) | 0.867 |
| Ileus/Small bowel obstruction (n = 44, %) | 23 (52.3) | 8 (38.1) | 15 (65.2) | 0.072 |
*P value for comparison between LOS groups. ** Mean ± standard deviation. ##Abscess size in cm represents the longest measurement in any direction.