Characteristics | Non-appendicitis n = 155 | Appendicitis n = 241 | OR (95% CI) | p value |
---|---|---|---|---|
Demographic | ||||
Age (year), mean (SD) | 33.8 (11.9) | 37.9 (15.9) | < 0.001 | |
Age group | ||||
< 40 | 99 (63.9) | 140 (58.1) | 1 | 0.251 |
≥ 40 | 56 (36.1) | 101 (41.9) | 1.3(0.8–1.9) | |
Sex, number, (%) | ||||
Male | 39 (25.2) | 93 (38.6) | 1.9(1.2–2.9) | < 0.001 |
Female | 116 (74.8) | 148 (61.4) | 1 | |
BMI, mean (SD) | 22.4 (3.9) | 22.95 (4.7) | 0.230 | |
Symptoms | ||||
First location of pain | ||||
Epigastrium | 40 (25.8) | 102 (42.3) | 2.2(1.4–3.4) | < 0.001 |
Periumbilical | 24 (15.5) | 31 (12.9) | 1.1(0.6–1.9) | |
Other | 91 (58.7) | 108 (44.8) | 1 | |
Type of pain | ||||
Dull aching, constant | 49 (31.6) | 82 (34.0) | 1.1(0.7–1.7) | 0.620 |
Colicky | 106 (68.4) | 159 (65.9) | 1 | |
Migration of pain | ||||
Absence | 108 (69.7) | 111 (46.1) | 1 | < 0.001 |
Presence | 47 (30.3) | 130 (53.9) | 2.7(1.8–4.1) | |
Onset | ||||
Insidious | 120 (77.4) | 146 (60.6) | 1 | < 0.001 |
Sudden | 35 (22.6) | 95 (39.4) | 2.2(1.4–3.5) | |
Progression of pain | ||||
Yes | 113 (72.9) | 223 (92.5) | 4.6(2.5–8.4) | |
No | 42 (27.1) | 18 (7.5) | 1 | < 0.001 |
Right lower quadrant pain at presentation | ||||
Yes | 140 (90.3) | 239 (99.2) | 12.8(2.9–56.8) | |
No | 15 (9.7) | 2 (0.8) | 1 | < 0.001 |
Time of pain before presentation (hours) | ||||
≤ 48 | 126 (81.3) | 204 (84.7) | 1.3(0.7–2.2) | 0.382 |
> 48 | 29 (18.7) | 37 (15.4) | 1 | |
Time of right lower quadrant pain before presentation (hours) | ||||
≤ 12 | 67 (43.2) | 107 (44.4) | 1.1(0.7–1.6) | 0.820 |
> 12 | 88 (56.8) | 134 (55.6) | 1 | |
Nausea or vomiting | ||||
Yes | 64 (41.3) | 141 (58.5) | 2.0(1.3–3.0) | |
No | 91 (58.7) | 100 (41.5) | 1 | < 0.001 |
Aggravation of pain by cough or movement | ||||
Yes | 88 (56.8) | 199 (82.6) | 3.6(2.3–5.7) | |
No | 67 (43.2) | 42 (17.4) | 1 | < 0.001 |
Anorexia | ||||
Yes | 118 (76.1) | 164 (68.1) | 0.7(0.4–1.1) | 0.083 |
No | 37 (23.9) | 77 (31.9) | 1 | |
Fever | ||||
Yes | 135 (87.1) | 154 (63.9) | 0.3(0.2–0.5) | < 0.001 |
No | 20 (12.9) | 87 (36.1) | ||
Bowel sound | ||||
Increase | 20 (12.9) | 37 (15.4) | 1.4(0.8–2.5) | 0.044 |
Decrease | 16 (10.3) | 45 (18.7) | 2.1(1 .1–3.9) | |
Normal | 119 (76.8) | 159 (65.9) | 1 | |
Body temperature (°C) | ||||
< 37.8 | 146 (94.2) | 176 (73.0) | 1 | < 0.001 |
≥ 37.8 | 9 (5.8) | 65 (26.9) | 5.9 (2.8–12.4) | |
Tenderness at right lower quadrant | ||||
Yes | 137 (88.4) | 240 (99.6) | 31.5 (4.2–238.8) | < 0.001 |
No | 18 (11.6) | 1 (0.4) | 1 | |
Rebound tenderness | ||||
Yes | 37 (23.9) | 155 (64.3) | 5.8(3.7–9.1) | < 0.001 |
No | 118 (76.1) | 86 (35.7) | 1 | |
Guarding | ||||
Yes | 26 (16.8) | 82 (34.0) | 2.6(1.6–4.2) | < 0.001 |
No | 129 (83.2) | 159 (65.9) | 1 | |
Laboratory results | ||||
WBC (cell/mm3) | ||||
≤ 10,000 | 55 (35.5) | 26 (10.8) | 1 | < 0.001 |
> 10,000 cell/mm3 | 100 (64.5) | 215 (89.2) | 4.6(2.7–7.7) | |
Neutrophil (%) | ||||
≤ 75% | 80 (51.6) | 54 (22.4) | 1 | < 0.001 |
> 75% | 75 (48.4) | 187 (77.6) | 3.7(2.4–5.8) |