TABLE 1

Baseline characteristics

CharacteristicsEarly PR group (n=70)Stable PR group (n=61)
Age years72.7±9.474.4±7.8
Male n (%)29 (41)25 (41)
FEV1 L1.0±0.41.0±0.4
FEV1 % predicted40.2±1544.1±17
MRC dyspnoea score3.4±0.93.1±0.8
CAT score16.8±6.014.7±5.3
LTOT n (%)3 (5)5 (8)
BMI kg·m−223.5±4.624.2±4.1
Smoking n (%)
 Current22 (31)15 (25)
 Former45 (64)43 (70)
 Never3 (4)3 (5)
 Exposure pack-years40.6±16.543.5±19.5
GOLD assessment
 Group C n (%)4 (6)5 (8)
 Group D n (%)66 (94)56 (92)
ISWT distance m186±117188±110
ESWT time s216±199263±210
ESWT level6.0±3.66.3±3.6

Data are presented as mean±sd unless otherwise stated. PR: pulmonary rehabilitation; FEV1: forced expiratory volume in 1 s; MRC: Medical Research Council; CAT: COPD Assessment Test; LTOT: long-term oxygen therapy; BMI: body mass index; GOLD: Global Initiative for Chronic Obstructive Lung Disease; ISWT: incremental shuttle walk test; ESWT: endurance shuttle walk test.