Table 3 Multiple logistic regression analysis of the risk factors for perforation in LIP patients and NP patients with appendicitis in Taiwan, 2003-2011

Gender

  Female

1

1

  Male

1.40 (1.18,1.67)

<0.001

1.34 (1.31,1.36)

<0.001

Age (years)

  0-14 y/o

1.98 (1.56,2.50)

<0.001

2.22 (2.15,2.30)

<0.001

  15-29 y/o

1

1

  30-44 y/o

1.62 (1.25,2.09)

<0.001

1.36 (1.32,1.40)

<0.001

  45-59 y/o

2.78 (2.11,3.67)

<0.001

2.22 (2.15,2.29)

<0.001

  ≥60 y/o

4.44 (3.27,6.05)

<0.001

3.74 (3.62,3.87)

<0.001

Comorbidities

  0

1

1

  1

1.34 (0.92,1.95)

0.126

1.46 (1.40,1.53)

<0.001

  ≥2

1.96 (0.67,5.68)

0.218

1.67 (1.47,1.91)

<0.001

Hospital Level

  District hospital

1

1

  Regional hospital

1.39 (1.11,1.73)

<0.001

1.33 (1.29,1.37)

<0.001

  Medical center

1.95 (1.53,2.50)

<0.001

1.52 (1.47,1.57)

<0.001