Table 3 Regression analysis of the factors for converting open laparotomy in CA

Preoperative status

Age

 ≥ 54 year

20

5 (25.0%)

4.55 (0.97–21.44)

0.050

Sex

Male

37

7 (18.9%)

6.07 (0.70–52.61)

0.102

BMI

 ≥ 25 kg/m²

9

2 (22.2%)

2.19 (0.37–13.08)

0.389

Underlying diseases

with

22

2 (9.1%)

0.6 (0.11–3.26)

0.554

Past history of

abdominal surgery

with

4

1 (25%)

2.52 (0.23–27.72)

0.449

Body temperature

 ≥ 37.5 ℃

33

4 (12.1%)

0.90 (0.20–3.95)

0.885

Peritonitis on physical

examination, n (%)

with

37

2 (5.4%)

0.20 (0.04–1.08)

0.062

Days from onset

to surgery

 ≥ 6 days

19

7 (36.8%)

25.67 (2.87–229.42)

0.004

11.80 (1.25–111.33)

0.010

preoperative data

Albumin

 < 4.0 mg/dL

14

4 (28.6%)

4.6 (0.98–21.57)

0.053

CRP

 ≥ 4.5 mg/dL

40

8 (20.0%%)

N.A

0.004

N.A

0.191

WBC

 ≥ 11,000 /μL

51

5 (9.8%)

0.36 (0.07–1.77)

0.226

Hb

 ≥ 15.9 mg/dL

12

4 (33.3%)

6 (1.24–28.99)

0.294

Neutrophils

 ≥ 9100 /μL

45

5 (11.1%)

0.40 (0.08–1.86)

0.246

Platelet

 ≥ 27.8 10⁴/μL

16

3 (18.8%)

1.98 (0.42–9.44)

0.401

preoperative

CT findings

Appendix diameter

 ≥ 14 mm

25

5 (20.0%)

2.83 (0.61–13.14)

0.18

Fecalith

with

39

2 (5.1%)

0.17 (0.03–0.93)

0.027

0.33 (0.05–2.18)

0.234

Ascites

with

24

5 (20.8%)

3.25 (0.70–15.05)

0.125

Abscess

with

27

5 (18.5%)

2.58 (0.52–1.88)

0.216

ileus

with

28

3 (10.7%)

0.74 (0.16–34.19)

0.702