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Table 4 Simplified predictive model for gangrenous appendicitis

From: Is it possible to predict the severity of acute appendicitis? Reliability of predictive models based on easily available blood variables

Model fit measures

Model

Deviance

AIC

R2McF

1

1996

2002

0.101

Model coefficients—gangrenous appendicitis

Predictor

Estimate

SE

Z

p

Odds ratio

Intercept

− 1.130

0.1504

− 7.51

< .001

0.323

Lymphocytes

− 0.557

0.0870

− 6.40

< .001

0.573

CRP/Albumin

0.227

0.0208

10.90

< .001

1.255

Prediction

Predictive measures

Accuracy

Specificity

Sensitivity

0.812

0.976

0.122

  1. Estimates represent the log odds of "Gangrenous Appendicitis = 1" versus "Gangrenous Appendicitis = 0"
  2. The cut-off value is set to 0.5
  3. CRP: C-reactive protein
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World Journal of Emergency Surgery

ISSN: 1749-7922