Table 2. Longitudinal changes in clinical features in the observation group.

	At diagnosis	Last visit	P value
Body mass index†	21.7 ± 2.6	20.6 ± 2.7	P = 0.012*
%VC ‡	88.5 ± 16.7	86.2 ± 17.4	P = 0.242
%FEV1.0 ‡	91.7 ± 20.8	79.8 ± 20.8	P = 0.002*
Radiographic score (CXR) §
Nodule	5.6 ± 3.2	7.3 ± 5.0	P = 0.001*
Infiltrate	3.0 ± 4.1	4.6 ± 5.9	P < 0.001*
Cavity	0.1 ± 0.5	0.1 ± 0.4	P = 0.569
Ectasis	4.9 ± 3.0	6.5 ± 3.5	P < 0.001*
Radiographic score (CT) ||
Nodule	8.4 ± 4.5	11.4 ± 5.4	P = 0.005*
Infiltrate	2.9 ± 3.7	4.6 ± 4.7	P = 0.065
Cavity	0.2 ± 0.5	0.6 ± 1.5	P = 0.050
Ectasis	7.4 ± 4.3	10.6 ± 4.0	P < 0.001*

%VC, vital capacity as percent of predicted; %FEV₁, Forced expiratory volume in 1 second as percent of forced vital capacity.

*t test (p < 0.05).

†:BMI at diagnosis are shown. n = 39, 32.

‡: Respiratory function test result are shown. n = 30, 33.

§: Radiological findings score on CXR are shown. n = 50, 50.

||: Radiological findings score on CT are shown. n = 47, 45.