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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