Variable | Males | Females |
Subjects | 1304 (45) | 1622 (55) |
Initial FEV1 L* | 3.63±1.16 | 2.60±0.75 |
Age at enrolment yrs* | 44.06±20.08 | 46.13±19.90 |
Mean BMI kg·m−2* | 25.01±3.70 | 24.03±4.43 |
Asthma duration yrs | 25.50±18.20# | 22.10±17.39¶ |
Age at time of new asthma diagnosis | 43.33±24.1 | 47.6±21.1 |
Age at time of new COPD diagnosis* | 61.79±17.1 | 57.1±18.8 |
FEV1 slope L·yr−1* | −0.031±0.12+ | −0.013±0.086§ |
Maximum pack-yrs* | 36.91±31.29ƒ | 25.00±23.00## |
Asthma pack-yrs* | 16.6±24.5 | 9.64±17.9 |
COPD pack-yrs* | 50.1±35.2 | 28.2±27.4 |
Asthma and COPD pack-yrs* | 49.9±35.1 | 24.3±31.1 |
Mean number of FEV1 observations | 3.55±3.12 | 4.12±3.21 |
Physician-confirmed asthma | 98 (7.52) | 116 (7.15) |
New physician-confirmed asthma | 31 (32.1) | 29 (25.0) |
Physician-confirmed COPD* | 177 (13.57) | 148 (9.12) |
Physician-confirmed asthma and COPD | 61 (4.68) | 64 (3.95) |
Breakdown of asthma and COPD | ||
Asthma and emphysema | 16 (26.23) | 11 (17.19) |
Asthma and CB* | 12 (19.67) | 29 (45.31) |
Asthma and CB and emphysema | 33 (54.10) | 24 (37.50) |
Data are presented as mean±sd or n (%)
FEV1: forced expiratory volume in one second
BMI: body mass index
COPD: chronic obstructive pulmonary disease
CB: chronic bronchitis
#: n=98
¶: n=116
+ n=1045
§: n=1368
ƒ: n=848
##: n=786
*: p<0.05 males versus females