Table 1 Characteristics of participants by the presence of breathlessness
Without breathlessness (mMRC 0–1) | With breathlessness (mMRC ≥ 2) | |
|---|---|---|
N | 24,996 (96.3%) | 952 (3.7%) |
Age (years) | 57.4 (4.3) | 58.3 (4.4) |
Female sex | 12,619 (50.5%) | 646 (67.9%) |
mMRC breathlessness rating | ||
0 | 23,741 (95.0%) | 0 |
1 | 1255 (5.0%) | 0 |
2 | 0 | 773 (81.2%) |
3 | 0 | 88 (9.2%) |
4 | 0 | 91 (9.6%) |
Smoking history | ||
Never | 12,987 (52.0%) | 361 (37.9%) |
Former | 9092 (36.4%) | 414 (43.5%) |
Current | 2917 (11.7%) | 177 (18.6%) |
Pack-years of smoking | 7.2 (11.4) | 14.2 (17.2) |
Body mass index (kg/m2) | ||
< 25.0 | 9255 (37.0%) | 128 (13.4%) |
25–29.9 | 10,957 (43.8%) | 293 (30.8%) |
≥ 30 | 4784 (19.1%) | 531 (55.8%) |
FEV1 (l) | 3.3 (0.8) | 2.7 (0.7) |
FEV1 (%pred) | 102.9 (13.4) | 92.5 (17.0) |
FVC (l) | 4.3 (1.0) | 3.6 (0.9) |
FVC (%pred) | 103.3 (12.7) | 96.1 (13.9) |
FEV1/FVC | 0.8 (0.1) | 0.8 (0.1) |
FEV1/FVC (%pred) | 99.3 (7.6) | 95.8 (11.6) |
Highest completed education | ||
University | 11,692 (46.8%) | 276 (29.0%) |
Secondary | 11,199 (44.8%) | 494 (51.9%) |
Primary or none | 2051 (8.2%) | 180 (18.9%) |
Missing | 54 (0.2%) | 2 (0.2%) |
Residence | ||
Own house | 12,105 (48.4%) | 329 (34.6%) |
Own apartment | 7447 (29.8%) | 277 (29.1%) |
Rented apartment | 5252 (21.0%) | 334 (35.1%) |
Other | 176 (0.7%) | 12 (1.3%) |
Missing | 16 (0.1%) | 0 (0.0%) |
Self-reported exercise level | ||
> 3 times/week | 3215 (12.9%) | 47 (4.9%) |
2–3 times/week | 4466 (17.9%) | 51 (5.4%) |
1–2 times/week | 5199 (20.8%) | 128 (13.4%) |
Not regularly | 5374 (21.5%) | 224 (23.5%) |
Never | 6613 (26.5%) | 491 (51.6%) |
Missing | 129 (0.5%) | 11 (1.2%) |