TABLE 5.

Multivariate Model for the Probability of Survival at 30 Days

Effect	OR	95% Wald Confidence Limits		p
Age	0.936	0.892	0.982	0.007
Sequential Organ Failure Assessment score at admission	0.752	0.624	0.906	0.003
Antibiotics within 24 hr of admission	3.619	1.064	12.306	0.04
Fluoroquinolone received (reference: macrolide only)	3.012	0.763	11.900	0.12

OR = odds ratio.

The C-statistic associated with this model is 0.83. Advanced age and higher SOFA scores are strongly predictive of 30-d postadmission mortality. Antibiotics received within 24 hr are marginally associated with 30-d survival. Receiving fluoroquinolone (singularly or in combination with macrolide) was associated with the higher odds of 30-d survival; however, this was not statistically significant.