Table 5 Risk factors for appendix suppuration identified by univariate and multivariate logistic regression analysis

Gender

 Male

35

54

0.164

0.878 (0.363, 2.119)

 Female

48

49

Reference

Age, years

37.5 (16 ~ 73)

42.4 (14 ~ 81)

0.040*

1.025 (0.995, 1.056)

First onset

 No

48

20

< 0.001*

0.591 (0.223, 1.567)

 Yes

35

83

Reference

Time interval from on-set to operation, days

 ≤ 1

21

43

< 0.001*

1.820 (0.355, 9.326)

 1 < and ≤ 2

18

40

2.614 (0.525, 13.012)

 2 < and ≤ 3

9

13

1.339 (0.200, 8.971)

 > 3

30

6

Reference

Preoperative leukocyte count, × 10⁹/L

8.4 (2.1 ~ 18.3)

13.8 (2.7 ~ 24.3)

< 0.001*

1.109 (0.975, 1.262)

Preoperative neutrophil percentage, %

64.7 (30.5 ~ 92.8)

82.5 (45.6 ~ 95.8)

< 0.001*

1.109 (1.051, 1.169)

Preoperative US revealed periappendiceal fluid

 No

78

69

< 0.001*

0.138 (0.034, 0.561)

 Yes

4

31

Reference