Table 2.

Diagnostic accuracy of imaging methods for community-acquired pneumonia.

	CT+	CT−	S	Sp	PPV	NPV	DA	k
CXR+	28	4	.64	.80	.88	.50	.69	.38
CXR−	16	6
LUS+	30	1	.68	.95	.97	.58	.77	.54
LUS−	14	19
CXR or LUS+	34	5	.77	.75	.85	.75	.77	.49
CXR or LUS−	10	15
QLUS+	41	1	.93	.95	.98	.86	.94	.85
QLUS−	3	19

S: sensitivity; Sp: specificity; PPV: positive predictive value; NPV: negative predictive value; DA: diagnostic accuracy; k: Cohen k test.

Other abbreviations are as in Table 1.