TABLE 1.

Selected Baseline, Infection, and Empiric Treatment Characteristics^a

Characteristic	Nonventilated HABP		Ventilated HABP		Ventilator-Associated Bacterial Pneumonia
	n = 4,728	%	n = 4,561	%	n = 8,530	%	p
Mean age, yr (sd)	66.7 (15.1)		65.7 (14.0)		59.7 (16.6)		< 0.001
Gender: male	2,845	60.17	2,921	64.04	5,557	65.15	< 0.001
Charlson Comorbidity Score
Mean (sd)	3.9 (2.8)		4.1 (2.8)		3.2 (2.5)		< 0.001
Median (interquartile range)	3 (2–5)		4 (2–6)		3 (1–5)		< 0.001
Illness severity measures by day 2 from infection onset
ICU admission	2,742	57.99	4,287	93.99	8,162	95.69	< 0.001
Vasopressors	365	7.72	1,770	38.81	2,103	24.65
Severe sepsis	627	13.26	1,166	25.56	1,393	16.33	< 0.001
Septic shock	557	11.78	1,472	32.27	1,603	18.79	< 0.001
Empiric treatment appropriateness
Non-IET	3,856	81.56	3,929	86.14	7,178	84.15	< 0.001
IET	403	8.52	254	5.57	615	7.21
Indeterminate	469	9.92	378	8.29	737	8.64

HABP = hospital-acquired bacterial pneumonia, IET = inappropriate empiric therapy.

^aFor a complete listing of characteristics and outcomes, please, see (18) and (19).