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Table 4 Grade of concordance by κ index

From: Ventilator-associated pneumonia in a surgical intensive care unit: epidemiology, etiology and comparison of three bronchoscopic methods for microbiological specimen sampling

Method 1 (threshold, CFU/ml)

 

Method 2 (threshold, CFU/ml)

κ

Concordance

TBS (105)

-

BAL (104)

1.000

Nearly complete

PSB (103)

-

BAL (104)

0.714

Strong

TBS (105)

-

PSB (103)

0.571

Clear

TBS (106)

-

PSB (103)

0.216

Weak/poor

TBS (106)

-

BAL (104)

0.200

Weak/poor

  1. BAL, bronchoalveolar lavage; CFU, colony-forming units; PSB, protected specimen brush; TBS, tracheobronchial secretion; VAP, ventilator- associated pneumonia.
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Critical Care

ISSN: 1364-8535