Table 3 Treatment intensity as measured by “antibiotic days” (ie, number of antibiotics prescribed multiplied by the duration of treatment)
Positive sample resultNegative sample result*Overall antibiotic use associated with diagnostic technique
Qualitative ETA diagnosis11.5 (8.9 to 14)1.5 (0 to 5)9.9 (7.4 to 12.3)
BAL diagnosis12.1 (8.8 to 15)5.8 (3.7 to 7.9)7.9 (6 to 9.8)
  • Data shown as mean and 95% CI.

  • *Sterile for ETA, <104 colony-forming units (CFU)/ml for BAL.

  • BAL, bronchoalveolar lavage; ETA, endotracheal aspirate.