Table 3. Analysis of factors predicting mortality of study patients with A. baumannii bacteremia by multivariate Cox's proportional hazard model^a.

Covariate	P value	Adjusted hazard ratio	95% Confidence interval
Pitt bacteremia score	0.02	1.29	1.04–1.60
Change of Oxa-51 DNA, day 0b – day 3(Δ log copies/mL/day)	0.004	1.87	1.22–2.85
Maximum Oxa-51 DNA, day 0b – day 3(log copies/mL)	0.09	1.52	0.94–2.45

^aTest of proportional-hazards assumption: P = 0.14>0.05, Groennesby and Borgan GOF test P = 0.23>0.05, adjusted generalized R² = 0.405.

^bDay 0 was the day on which the first blood sample positive for A. baumannii by culture was drawn.