Table 1 Demographics and baseline characteristics
NMT (n = 1943) | MT (n = 3040) | |
|---|---|---|
Age, mean (SD), years | 61.3 (8.2) | 64.6 (7.8) |
Sex, n (%) | ||
Male | 1193 (61.4) | 1893 (62.3) |
Race, n (%) | ||
White | 1563 (80.4) | 2381 (78.3) |
Asian | 229 (11.8) | 482 (15.9) |
Black or African American | 139 (7.2) | 163 (5.4) |
Other | 12 (0.6) | 14 (0.4) |
Smoking status | ||
Current, n (%) | 1244 (64.0) | 1284 (42.2) |
Former, n (%) | 699 (36.0) | 1756 (57.8) |
Number of packs/year smoked, mean (SD) | 49.5 (25.9) | 49.1 (26.2) |
CAT score | ||
Total CAT score, mean (SD) | 17.8 (7.7) | 17.0 (7.4) |
Symptomatic (CAT ≥15), n (%) | 1257 (64.7) | 1825 (60.0) |
mMRC grade, mean (SD) | 1.7 (1.0) | 1.8 (0.9) |
COPD severity, n (%) | ||
Mild (GOLD 1) | 13 (0.7) | 17 (0.6) |
Moderate (GOLD 2) | 1230 (63.3) | 1534 (50.5) |
Severe (GOLD 3) | 644 (33.1) | 1327 (43.7) |
Very severe (GOLD 4) | 56 (2.9) | 162 (5.3) |
GOLD 2017 category, n (%) | ||
A | 276 (14.2) | 453 (14.9) |
B | 1516 (78.0) | 2177 (71.6) |
C | 19 (1.0) | 54 (1.8) |
D | 125 (6.4) | 348 (11.4) |
Missing | 7 (0.4) | 8 (0.3) |
COPD duration, mean (SD), years | 6.5 (6.3) | 7.6 (6.2) |