Table 1 GAP index and number (%) of patients
Variables | GAP Points | No. of patients |
|---|---|---|
Gender | ||
 Female | 0 | 315 (25.7) |
 Male | 1 | 913 (74.3) |
Age, yr | ||
 ≤60 | 0 | 263 (21.4) |
 61–65 | 1 | 208 (16.9) |
 >65 | 2 | 757 (61.6) |
Physiology | ||
 FVC, % predicted | ||
  >75 | 0 | 626 (50.9) |
  50–75 | 1 | 540 (44.0) |
  <50 | 2 | 62 (5.0) |
 DLCO, % predicted |  |  |
  >55 | 0 | 735 (59.9) |
  36–55 | 1 | 399 (32.5) |
  ≤35 | 2 | 94 (7.6) |
  Can not perform | 3 | - |
GAP stage | ||
 Stage I | 0–3 | 760 (60.2) |
 Stage II | 4–5 | 455 (36.1) |
 Stage III | 6–8 | 47 (3.7) |