Table 1

Baseline characteristics of the total cohort at inclusion

CharacteristicsTotalEver hosp.Never hosp.P value
Sex, female, n (%)175 (46)83 (44)92 (48)0.434
Age, years, mean (SD)65.1 (7.6)67.0 (6.9)63.5 (7.9)<0.001
Laboratory data, mean (SD)
Haemoglobin, g/dL14.2 (1.3)14.1 (1.4)14.2 (1.3)0.423
Leucocyte count, 109/L7.0 (2.2)7.2 (2.4)6.9 (2.0)0.137
C reactive protein*, mg/L2.6 (2.9)3.0 (2.9)2.2 (2.9)0.006
Creatinine, mmol/L75.5 (22.4)76.6 (27.5)74.5 (17.0)0.352
hs-cTnT*, ng/L6.9 (2.6)8.8 (2.6)5.6 (2.5)<0.001
Clinical Variables, mean (SD)
FVC, L2.9 (1.3)2.7 (1.4)3.1 (1.1)0.010
FEV1, L1.6 (0.9)1.4 (0.7)1.8 (1.1)<0.001
FVC of predicted, %85.1 (28.1)81.2 (34.1)88.5 (21.4)0.012
FEV1 of predicted, %56.5 (27.4)50.1 (24.0)61.8 (29.0)<0.001
Arterial O2-tension, kPa9.3 (1.7)9.2 (1.6)9.4 (1.8)0.335
Arterial CO2-tension, kPa5.3 (0.8)5.3 (0.8)5.4 (0.8)0.316
Systolic BP, mm Hg134.1 (21.3)134.6 (20.9)133.6 (21.6)0.670
Heart rate (ECG), 1/min71.8 (12.9)73.0 (13.6)70.7 (12.1)0.113
Q-wave ECG, n (%)26 (8)17 (11)9 (6)0.109
Clinical History, n (%)
Coronary arterial disease23 (6)16 (9)7 (3)0.018
Arterial hypertension155 (40)78 (45)77 (37)0.134
Diabetes mellitus24 (6)13 (7)11 (5)0.389
Smoking habits
Current smoking, n (%)103 (27)43 (25)60 (29)0.365
Former smoking, n (%)244 (64)125 (72)119 (53)0.003
Pack-years, mean (SD)33.1 (21.0)37.9 (20.3)29.1 (20.8)<0.001
Group<0.001
References63 (16)12 (7)51 (25)
LTOT candidates21 (5)16 (9)5 (2)
Rehabilitation group
Outpatients63 (16)47 (28)16 (8)
Institutional63 (16)13 (7)50 (24)
Unselected outpatients173 (45)87 (50)86 (41)
  • BP, Blood Pressure; CRP, C-Reactive Protein; FEV1, forced expiratory volume in 1 s; FEV1, Forced Expiratory Volume in one second; FVC, Forced Volume Capacity; Hosp, hospitalised; hs-cTnT, high-sensitivity cardiac troponin T; LTOT, long-term oxygen therapy.