Odds ratio of the index variables in relation to the case fatality.

* P value < 0.05 is significant and all analysis was done by logistic regression model in SPSS 17.0. a LRINEC, laboratory risk indicator for necrotizing fasciitis. b MELD, model for end-stage liver disease. c MELD-Na, modified model for end-stage liver disease including sodium. d Δ, difference between the admission and the extreme scores. e OR, odds ratio; f CI, confidence interval. Odds ratio of the index variables in relation to the case fatality.