| | Parameters | Total N = 268 | AA group N = 212 (79.1%) | ARCD group N = 56 (20.9%) | p value |
| | Age (yr) | 40 (31–52) | 39 (30–53) | 41 (33–47) | 0.224 | | Male gender, no. (%) | 131 (48.9) | 107 (50.5) | 24 (42.9) | 0.368 | | BMI (kg/m2) | 23.3 (20.7–25.9) | 23.4 (20.9–25.9) | 22.4 (20.5–25.9) | 0.389 | | Onset-to-visit interval (hr) | 15 (4–47) | 11 (3–24) | 24 (13–48) | <0.001 |
| | Past medical history | | Diabetes, no. (%) | | 11 (4.1) | 8 (3.8) | 3 (5.4) | 0.704 | | Hypertension, no. (%) | 18 (6.7) | 12 (5.7) | 6 (10.7) | 0.226 | | History of diverticulitis, no. (%) | 15 (5.6) | 2 (0.9) | 13 (23.2) | <0.001 |
| | Symptoms and signs | | Body temperature(°C) | 36.8 (36.5–37.3) | 36.8 (36.5–37.3) | 36.8 (36.5–37.1) | 0.432 | | RLQ pain, no. (%) | 248 (92.5) | 200 (94.3) | 48 (85.7) | 0.042 | | Diarrhea, no. (%) | 48 (17.9) | 34 (16.0) | 14 (25.0) | 0.169 | | Constipation, no. (%) | 8 (3.0) | 4 (1.9) | 4 (7.1) | 0.062 |
| | Laboratory findings | | WBC | 11,470 (9,110–14,270) | 11,740 (9,155–14,550) | 11,160 (8,920–12,900) | 0.224 | | Absolute neutrophil count | 8,860 (6,340–11,670) | 9,210 (6,410–11,830) | 7,960 (6,130–9,930) | 0.063 | | Neutrophil (%) | 77.5 (69.1–83.3) | 78.6 (70.2–84.8) | 73.6 (67.1–77.0) | <0.001 | | Lymphocyte (%) | 14.8 (10.5–22.9) | 14.1 (9.3–22.0) | 18.2 (13.8–24.9) | 0.003 | | Hb (g/dL) | 13.9 (12.7–14.9) | 14.0 (12.8–15.0) | 13.8 (12.3–14.7) | 0.374 | | Hct (%) | 40.8 (37.5–43.9) | 40.8 (37.7–43.9) | 40.7 (36.9–43.8) | 0.920 | | Elevated ALT, no. (%) | 36 (13.4) | 31 (14.6) | 5 (8.9) | 0.286 | | Elevated Cr, no. (%) | 6 (2.2) | 5 (2.4) | 1 (1.8) | 1.000 | | Elevated CRP, no. (%) | 155 (57.1) | 123 (58.0) | 32 (57.1) | 1.000 | | CRP (mg/dL) | 1.5 (0.4–4.6) | 1.4 (0.3–4.2) | 2.2 (0.8–4.6) | 0.138 | | Ketonuria, no. (%) | 90/247 (36.4) | 80/200 (40.0) | 10/47 (21.3) | 0.018 |
| | Alvarado score and components | | Alvarado score | 6 (4–7) | 6 (4–7) | 5 (3–6) | <0.001 | | Migration pain, no. (%) | 49 (18.3) | 44 (20.8) | 5 (8.9) | 0.051 | | Anorexia, no. (%) | 90 (33.6) | 76 (35.8) | 4 (7.1) | <0.001 | | Nausea or vomiting, no. (%) | 92 (32.7) | 78 (35.1) | 14 (23.7) | 0.153 | | RLQ tenderness, no. (%) | 257 (95.9) | 208 (98.1) | 49 (87.5) | 0.002 | | Rebound tenderness, no. (%) | 99 (36.9) | 85 (40.1) | 14 (25.0) | 0.043 | | Body temperature ≥37.3°C, no. (%) | 71 (26.5) | 59 (27.8) | 12 (21.4) | 0.396 | | Leukocytosis, no. (%) | 179 (66.8) | 142 (67.0) | 37 (66.1) | 1.000 | | Neutrophilia, no. (%) | 154 (57.5) | 133 (62.7) | 21 (37.5) | 0.001 |
| | Outcomes | | Admission care, no. (%) | 236 (88.1) | 212 (100) | 24 (42.9) | <0.001 | | Hospital days | 5 (4–6) | 5 (4–6) | 5 (4–6) | 0.574 | | Surgical treatment, no. (%) | 211 (78.7) | 210 (99.1) | 0 | <0.001 | | Mortality, no. (%) | 1 (0.4) | 1 (0.5) | 0 | 1.000 |
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