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Table 2 Main clinical characteristics of the study population

From: Biomarkers of extracellular matrix turnover are associated with emphysema and eosinophilic-bronchitis in COPD

  COPD
n = 52
Controls
n = 37
Total
n = 89
Mean age, years (IQR) 69.5 (66–75) 63.6 (56–70) 66.7 (60.3–74)
Male sex, n (%) 27 (52) 9 (24.3) 35 (39.3)
Current smokers, n (%) 5 (9.6) 12 (32.4) 17 (19.1)
BMI (kg/m2) 29.3 (9.4) 28.6 (9.6) 29.0 (9.4)
GOLD stage, n (%)
 1 7 (13.5) N/A N/A
 2 16 (30.7) N/A N/A
 3 12 (23.1) N/A N/A
 4 16 (30.7) N/A N/A
 N/A 1 (1.9) N/A N/A
FEV1, liters (SD) 1.47 (0.77) 2.60 (0.77) 1.95 (0.95)
FEV1, % of predicted (SD) 58.4 (74.4) 92.5 (16.4) 83.1 (47.6)
FVC, liters (SD) 2.71 (1.06) 3.25 (0.90) 2.94 (1.02)
FVC, % of predicted (SD) 77.5 (60.0) 89.9 (19.2) 83.1 (48.6)
FEV1/FVC ratio 0.49 (0.13) 0.80 (0.05) 0.62 (0.19)
6 MWD, meters (SD) 340 (134) 455 (110) 391 (137)
SF36 PCS (SD) 36.3 (10.6) 50.8 (8.2) 42.4 (12.0)
SF36 MCS (SD) 53.4 (9.1) 52.6 (11.4) 53.1 (10.1)
  1. Data are presented as mean (SD), unless stated otherwise. IQR Inter-Quartile Range, BMI Body Mass Index, FEV 1 Forced Expiratory Volume in 1 s, FVC Forced Vital Capacity, 6MWD 6 min Walking Distance, SF 36 PCS Physical Component Score of the SF-36 quality of life psychometric tool, SF-36 MCS Mental Component Score of the SF-36 quality of life psychometric tool. Higher score reflects better health