A comparison of diagnostic algorithms and clinical parameters to diagnose ventilator-associated pneumonia: a prospective observational study

Table 4 Sensitivity, specificity, and Youden index for assessed methods of ventilator-associated pneumonia diagnosis compared to the HELICS criteria as the reference standard

Criteria	Ventilator-Associate Pneumonia			% Sensitivity	% Specificity	Youden index ^a
Criteria	Positive	Negative	Total	% Sensitivity	% Specificity	Youden index ^a
CDC/NHSN
Positive	45	38	83	54.22	100	0.542
Negative	0	2	2
Total	45	40	85
CPIS
Positive	44	20	64	68.75	95.23	0.640
Negative	1	20	21
Total	45	40	85
Johanson
Positive	44	21	65	67.69	95	0.627
Negative	1	19	20
Total	45	40	85

CDC/NHSN = centers for disease control and prevention national health safety network; CPIS = Clinical Pulmonary Infection Score, HELICS = Hospital in Europe Link for Infection Control through Surveillance
^aA measure of the maximum diagnostic accuracy, where 1 signifies a perfect test and 0 signifies no diagnostic value

ISSN: 1471-2466