Table 6.

Kappa agreement coefficient among ventilator-associated pneumonia diagnostic methods

Criteria	Kappa (ĸ) index, agreement level a	p-Value
CPIS and Johanson	0.874	< 0.001
CDC/NHSN and Johanson	0.145	< 0.001
CDC/NHSN and CPIS	0.129	0.015

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

^aAgreement based on score: ≤ 0 (no agreement); 0.01–0.20 (slight); 0.21–0.40 (fair); 0.41– 0.60 (moderate); 0.61–0.80 (substantial); and 0.81–1.00 (almost perfect agreement)