95% Cl

p

Odds ratio

Lower limit

Upper limit

Age (year)

0.798

0.23

0.13

0.48

Gender

0.625

1.61

0.14

18.31

Family history of acute appendicitis

<0.001

4.276

3.508

8.945

Vegetable consumption

<0.001

3.184

2.041

4.913

Allergy

<0.001

2.789

1.512

6.651

Affiliation

<0.001

2.502

0.675

7.120

Secondhand smoking

0.512

0.168

0.023

0.257