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Table 7 Multivariate generalized linear gamma regression explaining the cardiac patients' length of intensive care unit stay (days)

From: Predictors of aortic clamp time duration and intensive care unit length of stay in elective adult cardiac surgery

Parameter Exponentiated beta coefficient 95% Wald C. I for Exp(B) p value
Lower Upper
(Intercept) 0.414 0.350 0.490 < 0.001
Sex = male 1.028 0.955 1.105 0.463
Age (years) 1.005 1.002 1.007 < 0.001
Required inotropic support in the ITU/OR 1.223 1.124 1.330 < 0.001
Body mass type: obese or overweight 1.032 0.967 1.101 0.347
Aortic cross-clamp time in minutes 1.013 1.010 1.015 < 0.001
First 24 h total blood loss (cc) 1.001 1.000 1.001 < 0.001
EUROSCORE 1.043 1.001 1.086 0.046
  1. Dependent variable: ICU length of stay days. Estimating method = gamma regression with maximum likelihood. Exponentiated beta coefficient is interpreted just like a risk rate or like an odds ratio