Patients | 9475 | 4371 | 5104 |
Age, years | 69.7±10.0 | 70.0±9.7 | 69.4±10.2 |
Female | 4111 (43.4) | 1809 (41.4) | 2302 (45.1) |
Current smoker# | 3946 (41.8) | 1836 (42.1) | 2110 (41.6) |
Airflow limitation severity (most recent FEV1% predicted)¶ | | | |
Mild (≥80%) | 838 (11.9) | 401 (11.3) | 437 (12.5) |
Moderate (50–80%) | 3878 (55.0) | 2110 (59.4) | 1768 (50.6) |
Severe (30–50%) | 2010 (28.5) | 914 (25.7) | 1096 (31.4) |
Very severe (<30%) | 322 (4.6) | 127 (3.6) | 195 (5.6) |
Asthma >2 years previously | 1098 (11.6) | 269 (6.2) | 829 (16.2) |
History of atopy+ | 2493 (26.3) | 1107 (25.3) | 1386 (27.2) |
Exacerbations in previous year | | | |
0 | 4887 (51.6) | 2433 (55.7) | 2454 (48.1) |
1 | 2829 (29.9) | 1250 (28.6) | 1579 (30.9) |
2 | 1165 (12.3) | 466 (10.7) | 699 (13.7) |
⩾3 | 594 (6.3) | 222 (5.1) | 372 (7.3) |
Pneumonia episodes in previous year | | | |
0 | 7484 (79.0) | 3514 (80.4) | 3970 (77.8) |
1 | 1500 (15.8) | 660 (15.1) | 840 (16.5) |
⩾2 | 491 (5.2) | 197 (4.5) | 294 (5.8) |
Theophylline in previous 2 years | 97 (1.0) | 17 (0.4) | 80 (1.6) |
Oxygen use ever | 46 (0.5) | 19 (0.4) | 27 (0.5) |
Nebulisers in previous 2 years | 157 (1.7) | 48 (1.1) | 109 (2.1) |
Nonelective hospitalisations§ in previous year | | | |
0 | 7767 (82.0) | 3663 (83.8) | 4104 (80.4) |
1 | 1277 (13.5) | 529 (12.1) | 748 (14.7) |
⩾2 | 431 (4.6) | 179 (4.1) | 252 (4.9) |
GP consultations in previous year | | | |
0–3 | 2699 (28.5) | 1280 (29.3) | 1419 (27.8) |
4–7 | 3381 (35.7) | 1586 (36.3) | 1795 (35.2) |
⩾8 | 3395 (35.8) | 1505 (34.4) | 1890 (37.0) |
Influenza vaccination in previous year | 6710 (70.8) | 3106 (71.1) | 3604 (70.6) |
Blood eosinophil count (cells·µL−1) | | | |
Geometric mean | 200 | 200 | 201 |
Median (IQR) | 200 (100–300) | 200 (100–300) | 200 (100–300) |