Accuracy of the clinical pulmonary infection score to differentiate ventilator-associated tracheobronchitis from ventilator-associated pneumonia

Annals of Intensive Care

Table 3 Microbiological findings

	Derivation cohort		P value	Validation cohort		P value
	VAT (n = 320)	VAP (n = 369)	P value	VAT (n = 70)	VAP (n = 136)	P value
Streptococcus pneumoniae	16 (5%)	24 (7%)	0.41	2 (3%)	5 (4%)	1
Stenotrophomonas maltophila	19 (6%)	12 (3%)	0.09	4 (6%)	6 (4%)	0.74
MRSA	8 (2%)	8 (2%)	0.77	1 (1%)	1 (1%)	1
MSSA	66 (21%)	80 (22%)	0.73	6 (9%)	21 (15%)	0.17
Serratia marcescens	12 (4%)	16 (4%)	0.69	3 (4%)	5 (4%)	1
Pseudomonas aeruginosa	79 (25%)	89 (24%)	0.86	20 (29%)	29 (21%)	0.25
Proteus mirabilis	15 (5%)	14 (4%)	0.56	3 (4%)	5 (4%)	1
Klebsiella pneumoniae	48 (15%)	53 (14%)	0.81	9 (13%)	30 (22%)	0.11
Haemophilus influenzae	32 (10%)	25 (7%)	0.12	4 (6%)	6 (4%)	0.74
Escherichia coli	37 (12%)	40 (11%)	0.76	5 (7%)	9 (7%)	1
Enterobacter spp.	35 (11%)	46 (12%)	0.53	4 (6%)	21 (15%)	0.043
Citrobacter freundii	7 (2%)	6 (2%)	0.58	4 (6%)	1 (1%)	0.047
Acinetobacter baumannii	14 (4%)	27 (7%)	0.10	0 (0%)	2 (1%)	0.55

Data are presented as number (%) or mean (SD)
COPD Chronic obstructive pulmonary disease, MSSA Methicillin-sensitive Staphylococcus Aureus, MRSA Methicillin-resistant Staphylococcus Aureus, SAPS Simplified acute physiology score, SOFA Sequential organ failure assessment, VAP Ventilator-associated pneumonia, VAT Ventilator-associated tracheobronchitis
p values < 0.05 are indicated in italic characters