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Table 2 Multivariable logistic regression model (0 = not seen, 1 = visualized)

From: Factors affecting perception of the normal pediatric appendix on sonography

Model for pediatrics (age < 18)

Odds ratio (95% confidence interval)

p value

Age in years

1.04 (0.94, 1.15)

0.430

Patient sex (0 = male (ref), 1 = female)

0.50 (0.22, 1.14)

0.099

US time in minutes

1.04 (1.01, 1.07)

0.012

Experience in years

1.07 (1.02, 1.13)

0.012

  1. Cox and Snell R-square = 0.17; overall model Chi-square = 22.0, p < 0.001