Variable | Total GAP score (n = 1,228) | p-value | |||||
---|---|---|---|---|---|---|---|
1 (n = 150) | 2 (n = 208) | 3 (n = 376) | 4 (n = 317) | 5 (n = 138) | 6 (n = 39) | ||
Pulmonary function test | |||||||
 FVC (%) | 85.6 ± 13.4 | 81.9 ± 17.4 | 81.3 ± 17.2 | 71.4 ± 15.7 | 63.2 ± 15.1 | 55.5 ± 12.9 | <0.001a |
 FEV1 (%) | 93.1 ± 15.0 | 91.4 ± 21.2 | 92.5 ± 19.5 | 82.9 ± 16.8 | 74.4 ± 16.2 | 64.9 ± 14.9 | <0.001a |
 TLC (%) | 90.8 ± 19.7 | 84.8 ± 19.7 | 87.2 ± 18.5 | 80.2 ± 18.6 | 72.0 ± 15.6 | 67.1 ± 23.9 | <0.001a |
 DLCO (%) | 75.8 ± 15.8 | 67.4 ± 17.1 | 67.1 ± 21.3 | 59.2 ± 19.9 | 41.7 ± 13.6 | 31.9 ± 11.1 | <0.001a |
Resting PaO2 mm Hg | 90.5 ± 21.2 | 85.8 ± 19.6 | 82.5 ± 22.3 | 78.6 ± 18.7 | 74.5 ± 21.5 | 69.5 ± 13.7 | <0.001a |
Resting PaCO2 mm Hg | 39.3 ± 8.2 | 39.2 ± 6.5 | 37.4 ± 7.8 | 36.5 ± 6.2 | 35.1 ± 6.9 | 36.7 ± 6.4 | <0.001a |
Radiologic finding | |||||||
 Reticular pattern | 108 (75.5) | 144 (73.5) | 214 (60.5) | 185 (65.4) | 82 (65.6) | 22 (62.9) | 0.008 |
 Honeycombing change | 105 (77.2) | 141 (71.9) | 282 (78.6) | 241 (81.4) | 110 (84.0) | 31 (81.6) | 0.101 |
 Ground glass opacities | 98 (68.5) | 132 (68.4) | 206 (58.9) | 155 (58.5) | 67 (56.3) | 22 (68.8) | 0.052 |
 Nodular lesions | 26 (20.3) | 37 (19.9) | 85 (25.5) | 58 (23.6) | 23 (21.9) | 8 (25.8) | 0.702 |