Table 6.
Distribution of GAP points by each predictor according to total GAP score
| Variable | GAP Points | 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) | |||
| Gender | <0.001 | |||||||
| Female | 0 | 59 (39.3) | 94 (45.2) | 95 (25.3) | 48 (15.1) | 15 (10.9) | 4 (10.3) | |
| Male | 1 | 91 (60.3) | 114 (54.8) | 281 (74.7) | 269 (84.9) | 123 (89.1) | 35 (89.7) | |
| Age, yr | <0.001 | |||||||
| ≤60 | 0 | 121 (80.7) | 76 (36.5) | 45 (12.0) | 15 (4.7) | 6 (4.3) | - | |
| 61–65 | 1 | 29 (19.3) | 76 (36.5) | 66 (17.6) | 24 (7.6) | 12 (8.7) | 1 (2.6) | |
| >65 | 2 | - | 56 (26.9) | 265 (70.5) | 278 (87.7) | 120 (87.0) | 38 (97.4) | |
| Physiology | ||||||||
| FVC, % predicted | <0.001 | |||||||
| >75 | 0 | 127 (84.7) | 134 (64.4) | 249 (66.2) | 94 (29.7) | 22 (15.9) | - | |
| 50-75 | 1 | 23 (15.3) | 71 (34.1) | 121 (32.2) | 211 (66.6) | 92 (66.7) | 22 (56.4) | |
| <50 | 2 | - | 3 (1.4) | 6 (1.6) | 12 (3.8) | 24 (17.4) | 17 (43.6) | |
| DLCO, % predicted | <0.001 | |||||||
| >55 | 0 | 143 (95.3) | 172 (82.7) | 263 (69.9) | 147 (46.4) | 10 (7.2) | - | |
| 36–55 | 1 | 7 (4.7) | 35 (16.8) | 108 (28.7) | 156 (49.2) | 81 (58.7) | 12 (30.8) | |
| ≤35 | 2 | - | 1 (0.5) | 5 (1.3) | 14 (4.4) | 47 (34.1) | 27 (69.2) | |
Note: Values in parentheses are percentages
“Cannot perform” in DLCO was not recorded in this study
Total GAP score 3 group was compared with each group 2 and group 4 by Bonferroni adjustment. The following post hoc comparisons were significant at the adjusted p value = 0.05; Score 3 group versus Score 2 group (Gender, age, and DLCO, % predicted); Score 3 group versus Score 4 group (Gender, age, FVC, % predicted and DLCO, %predicted)
GAP gender, age, and 2 lung physiology variables (FVC and DLCO)