TABLE 1

Participant characteristics

VariablesTotal sample size1MSTSSTD1MSTSIND1MSTSIND–1MSTSSTD
Number of participants492425
Age (years)68.8±9.266.7±9.770.8±8.4
Sex (n, %)
 Female23 (47)14 (58)9 (36)
 Male26 (53)10 (42)16 (64)
BMI (kg·m−2)24.4±6.625.12±7.0723.72±6.18
Body height (cm)167±8167±8168±9
FEV1/FVC (z-score)−3.2±1.0−3.3±1.0−3.0±1.1
FEV1 (% predicted)43±1842±1944±17
GOLD stages (n, %)
 II22 (45)11 (46)11 (44)
 III26 (53)12 (50)14 (56)
 IV1 (2)1 (4)0
Leg length (cm)85.5±4.785.9±4.585.1±4.9
Lower leg length (cm)46.6±3.046.7±3.146.4±3.0
Knee joint angle on standard chair (°)87±587±587±5
Seat height of individual chair (cm)44.5±2.844.1±3.344.8±2.1
 <89° (range)42.6 (37.5–44.9)41.9 (37.5–44.6)43.3 (38.8–44.9)
 89–91°464646
 >91° (range)47.9 (46.5–50.1)48.3 (46.8–50.1)47.4 (46.5–48.2)
Repetitions during 1MSTSTEST14±515±613±5

Data are presented as: mean±sd, number (percentage) or mean (range). 1MSTS: 1 min sit-to-stand; 1MSTSSTD: 1 min sit-to-stand test performed on 46 cm height chair; 1MSTSIND: 1 min sit-to-stand test performed on chair adapted to 90° knee flexion; 1MSTSTEST: 1 min sit-to-stand test performed on chair adapted to 90° knee flexion used as familiarisation test; FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity.