Table 6.

Predictive values of multiparameter ventilator-associated pneumonia score on Day 1 and Day 3

	Clinical D1	Clinical D1 CXR	Clinical D1 LU	Clinical D3	Clinical D3 LU
Cut-off	2	3	4	2	5
Sensitivity	0.97	0.81	0.94	1	0.94
(95% CI)	(0.83–1)	(0.63–0.93)	(0.79–0.99)	(0.89–1)	(0.76–0.99)
Specificity	0.33	0.66	0.67	0.33	0.83
(95% CI)	(0.04–0.78)	(0.22–0.96)	(0.22–0.96)	(0.04–0.78)	(0.36–1)
Positive likelihood ratio	1.45	2.42	2.81	1.5	5.61
(95% CI)	(0.82–2.57)	(0.77–7.6)	(0.9–8.73)	(0.85–2.64)	(0.94–33.67)
Negative likelihood ratio	0.1	0.29	0.1	0	0.08
(95% CI)	(0.01–0.91)	(0.12–0.72)	(0.02–0.41)		(0.02–0.31)
Positive predictive value	0.88	0.93	0.93	0.88	0.97
(95% CI)	(0.91–0.93)	(0.8–0.97)	(0.82–0.98)	(0.81–0.93)	(0.83–0.99)
Negative predictive value	0.66	0.4	0.66	1	0.71
(95% CI)	(0.71–0.95)	(0.21–0.62)	(0.32–0.9)		(0.38–0.9)
AUC (SE)	0.88 (0.06)	0.85 (0.07)	0.91 (0.06)	0.99 (0.01)	0.97 (0.03)
p	0.004	0.008	0.002	0.0002	0.0003
Youden J index	0.68	0.51	0.6	0.95	0.79

AUC area under the receiver operating characteristic curve, CI confidence intervals, CXR chest X-ray, D day, LU lung ultrasound, SE standard error