FEV6 repeatability⩾150 ml | FEV6 repeatability<150 ml | p Value | |
Total (n = 1345)† | 109 (8.1%) | 1236 (91.9%) | |
Age (years)* | 74.8 (6.2) | 73.1 (6.0) | 0.004 |
Respiratory function | |||
Obstructed (n = 352)† | 21 (19.3%) | 331 (26.8%) | 0.150 |
Restricted (n = 222)† | 23 (21.1%) | 199 (16.1%) | |
Normal (n = 771)† | 65 (59.6%) | 706 (57.1%) | |
Smoking habit | |||
Non-smokers (n = 568)† | 44 (40.4%) | 524 (42.4%) | 0.591 |
Current or former smokers (n = 777)† | 65 (59.6%) | 712 (57.6%) | |
Sex | |||
Women (n = 631)† | 40 (36.7%) | 591 (47.8%) | 0.026 |
Men (n = 714)† | 69 (63.3%) | 645 (52.2%) | |
Spirometric parameters | |||
FEV1 (% predicted)* | 86.9 (26.5) | 88.1 (26.7) | 0.770 |
FVC (% predicted)* | 88.9 (18.4) | 92.0 (19.6) | 0.107 |
FEV1/FVC* | 69.9 (14.7) | 67.9 (13.7) | 0.104 |
Educational level | |||
⩽5 years (n = 821)† | 82 (75.2%) | 739 (59.8%) | 0.001 |
>5 years (n = 524)† | 27 (24.8%) | 497 (40.2%) | |
GDS* | 4.1 (3.6) | 3.7 (3.3) | 0.301 |
MMSE* | 25.9 (4.4) | 27.2 (3.1) | <0.001 |
Barthel score* | 91.6 (13.1) | 94.1 (6.6) | 0.001 |
6MWT (m)* | 304.4 (130.1) | 334.5 (122.9) | 0.020 |
BMI (kg/m2)* | 25.9 (3.8) | 26.6 (4.3) | 0.086 |
Waist-hip ratio* | 1.01 (0.10) | 1.00 (0.05) | 0.208 |
Occiput wall distance (cm)* | 5.9 (4.2) | 5.7 (4.5) | 0.659 |
Values are *mean (SD) or †n (%).
FEV6, volume forcefully exhaled at exactly 6 s after back-extrapolated time 0; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; GDS, Geriatric Depression Scale; MMSE, Mini Mental Status Examination; 6MWT, 6 min walking test; BMI, body mass index.