Table 2.

Chest X-ray features of elderly patients with pulmonary tuberculosis and those with non-tuberculosis CAP.

	Pulmonary TB (n = 133)	Non-TB CAP (n = 133)	p value	NPV	PPV
GGO	96 (72)	99 (75)	0.603	0.471	0.492
Consolidation	97 (73)	87 (66)	0.215	0.556	0.527
Cavity	27 (20)	11 (8)	0.005	0.533	0.711
Nodule	35 (26)	16 (12)	0.003	0.542	0.686
Distributions of GGO and/or consolidation
Number of segments	3 (2–5)	2 (1–3)	< 0.001
Bilateral lungs	119 (90)	118 (89)	0.983	0.500	0.502
Right lung	107 (81)	101 (77)	0.436	0.544	0.514
Left lung	85 (64)	64 (49)	0.011	0.586	0.570
Upper field	101 (76)	62 (47)	< 0.001	0.686	0.620
Middle field	94 (71)	74 (56)	0.014	0.598	0.560
Lower field	91 (68)	97 (74)	0.364	0.455	0.484

Data are presented as number (%).

CAP community-acquired pneumonia, TB tuberculosis, NPV negative predictive value, PPV positive predictive value, GGO ground-glass opacities.