All | Low risk | Males | Females | |||
All | Low risk | All | Low risk | |||
Subjects n | 9484 | 4329 | 4640 | 2159 | 4844 | 2170 |
mMRC grade 0 | 73 | 84 | 80 | 89 | 67 | 78 |
mMRC grade 1 | 14 | 12 | 11 | 8 | 16 | 15 |
mMRC grade 2 | 7 | 3 | 5 | 2 | 9 | 5 |
mMRC grade 3 | 4 | 1 | 2 | 0.7 | 5 | 2 |
mMRC grade 4 | 2 | 0.3 | 2 | 0.1 | 2 | 0.5 |
Data are presented as %, unless otherwise stated. The low risk for dyspnoea subgroup of study participants was defined as those without post-pronchodilator (BD) airflow restriction, spirometric chronic obstructive pulmonary disease (COPD) or pre-BD airflow obstruction, or self-reported heart disease, asthma, attacks of wheezing and dyspnoea, emphysema, chronic bronchitis, COPD, tuberculosis or lung cancer.