Table 1 Comparison of the patients between UA and CA

Background

Age, median (range), years

33.3 (8–91)

48.1 (4–88)

 < 0.001

Sex, Male/ Female, n

120/ 98

47/ 40

0.899

Underlying diseases, n (%)

41 (18.8%)

33 (37.9%)

0.001

BMI, median (range), kg/m²

21.3 (14.3–36.3)

21.7 (15.7–33.7)

0.828

Preoperative tatus

Initial symptoms, n (%)

(Localized abdominal pain/

Extensive abdominal pain/ other)

205 (94%)/ 2 (0.9%)/ 11 (5.1%)

77 (88.5%)/ 7 (8.1%)/ 3 (3.5%)

0.004

Body temperature, ℃

37.0 (35.8–39.8)

37.5 (36.0–39.8)

 < 0.001

Peritonitis on physical examination, n (%)

18 (8.3%)

43 (49.4%)

 < 0.001

Preoperative data

Albumin, median (range), mg/dL

4.5 (3.1–5.6)

4.3 (2.8–5.7)

 < 0.001

CRP, median (range), mg/dL

1.45 (0.01–24.96)

8.65 (0.12–35.89)

 < 0.001

WBC, median (range), /μL

11,500 (3300–24,000)

12,900 (4200–27,600)

 < 0.001

Hb, median (range), mg/dL

14.2 (7.3–17.0)

13.7 (5.2–20.4)

0.253

Neutrophils, median (range), /μL

9379 (1788–22,224)

10,919 (3360–23,543)

 < 0.001

Lymphocytes, median (range), /μL

13.9 (3.0–50.6)

9.2 (2.2–23.0)

 < 0.001

Platelet, median (range), 10⁴/μL

24.1 (8.0–44.4)

24. (11.0–47.4)

0.988

CT findings

Appendix diameter, median, (range), mm

10 (3–20)

13 (6.3–24)

 < 0.001

Fecalith, n

35 (17.4%)

44 (50.6%)

 < 0.001

Ascites, n

12 (5.5%)

31 (35.6%)

 < 0.001

Abscess, n

1 (0.5%)

42 (48.3%)

 < 0.001

Initial treatment

Conservative/ Emergent surgery, n %

176 (80.7%)/ 42 (19.2%)

31 (35.6%)/ 56 (64.3%)

 < 0.001

Results

Failure of conservative treatment, %

0.6% (1/ 176)

51.6% (16/ 31)

 < 0.001

Completion rate of laparoscopic surgery, %

100% (42/42)

87.5% (56/64)

0.021

Interval appendectomy, %

23.9% (42/ 176)

9.7% (3/ 31)

0.098

Pathological findings

catarrhal/ phlegmonous/ gangrenous/ chronic

21 (27.3%)/ 25 (32.5%)/

7 (9.1%)/ 24 (31.2%)

1 (2.3%)/ 18 (24.0%)/

53 (70.7%)/ 3 (4.0%)

 < 0.001