Table 5 Summarised changes in GOLD category
From: The effect of changes to GOLD severity stage on long term morbidity and mortality in COPD
GOLD category change | Change for first two visits only (i.e. 1 per patient) | Change between subsequent visits for all visits (up to 11 per patient) | ||
|---|---|---|---|---|
n (visit pairs) | % | n (visit pairs) | % | |
A → A | 1819 | 37.2 | 5802 | 35.2 |
A → B | 369 | 7.6 | 1180 | 7.2 |
A → C | 144 | 3.0 | 546 | 3.3 |
A → D | 88 | 1.8 | 237 | 1.4 |
B → A | 340 | 7.0 | 985 | 6.0 |
B → B | 704 | 14.4 | 2375 | 14.4 |
B → C | 44 | 0.9 | 139 | 0.8 |
B → D | 180 | 3.7 | 609 | 3.7 |
C → A | 119 | 2.4 | 404 | 2.5 |
C → B | 34 | 0.7 | 115 | 0.7 |
C → C | 221 | 4.5 | 765 | 4.7 |
C → D | 102 | 2.1 | 434 | 2.7 |
D → A | 50 | 1.0 | 130 | 0.8 |
D → B | 124 | 2.5 | 406 | 2.5 |
D → C | 86 | 1.8 | 268 | 1.6 |
D → D | 461 | 9.4 | 2068 | 12.6 |
With GOLD categories B & C combined | ||||
A → A | 1819 | 37.2 | 5802 | 35.2 |
A → BC | 513 | 10.5 | 1726 | 10.5 |
A → D | 88 | 1.8 | 237 | 1.4 |
BC → A | 459 | 9.4 | 1389 | 8.4 |
BC → BC | 1003 | 20.5 | 3394 | 20.6 |
BC → D | 282 | 5.8 | 1043 | 6.3 |
D → A | 50 | 1.0 | 130 | 0.8 |
D → BC | 210 | 4.3 | 674 | 4.1 |
D → D | 461 | 9.4 | 2068 | 12.6 |