Table 1 Clinical characteristics of patients with simple appendicitis (AAST grade I) and complicated appendicitis (AAST grade ≥ II) classified by indwelling abdominal drainage status
Simple appendicitis (AAST I, n = 820) | Complicated appendicitis (AAST II/III/IV/V, n = 421) | ||||||
|---|---|---|---|---|---|---|---|
+ drainage (N = 82) | − drainage (N = 738) | P value | + drainage (N = 192) | − drainage (N = 229) | P value | P value1 | |
Age, yrs (mean ± SD) | 41.27 ± 18.79 | 38.12 ± 17.15 | 0.1183 | 46.38 ± 19.01 | 42.44 ± 19.93 | 0.0395 | < 0.0001 |
Sex, n | 0.3157 | 0.1179 | 0.0092 | ||||
Female (%) | 34 (41.46) | 349 (47.29) | 67 (34.90%) | 97 (42.36%) | |||
Male (%) | 48 (58.54) | 389 (52.71) | 125 (65.10%) | 132 (57.64%) | |||
BMI, kg/m2, (mean ± SD) | 23.37 ± 3.62 | 23.45 ± 4.11 | 0.8741 | 24.08 ± 4.55 | 23.57 ± 4.37 | 0.2370 | 0.1631 |
Pain duration, n (%) | 0.2186 | 0.0022 | < 0.0001 | ||||
< 24hs | 24 (29.27) | 171 (23.17) | 105 (54.69) | 91 (39.74) | |||
≥ 24 h | 58 (70.73) | 567 (76.83) | 87 (45.31) | 138 (60.26) | |||
ASA1 class, n | 0.1102 | 0.0964 | 0.0007 | ||||
I/II/III/IV | 40/39/3/0 | 282/398/58/0 | 55 /105/29/3 | 83/124/21/1 | |||
Previous abdominal surgery, n(%) | 6 (7.32) | 71 (9.62) | 0.4975 | 9 (4.69) | 29 (12.66) | 0.0044 | 0.8341 |
Alvarado score (mean ± SD) | 5.30 ± 1.75 | 5.70 ± 1.55 | 0.0322 | 6.04 ± 1.59 | 7.05 ± 7.01 | 0.0351 | 0.0005 |
AAST grade, n(%) | NA | 0.0012 | NA | ||||
II (%) | NA | NA | 21 (10.94) | 52 (22.71) | |||
III (%) | 31 (16.15) | 46 (20.09) | |||||
IV (%) | 72 (37.50) | 80 (34.93) | |||||
V (%) | 67 (35.42) | 51 (22.27) | |||||