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Table 3 Microbiological findings

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

  Derivation cohort P value Validation cohort P value
VAT (n = 320) VAP (n = 369) VAT (n = 70) VAP (n = 136)
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
  1. Data are presented as number (%) or mean (SD)
  2. 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
  3. p values < 0.05 are indicated in italic characters