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Table 1 Comparison of demographic parameters, pulmonary function results and Quality of Life Score between two COPD groups

From: Disturbance of the OPG/RANK/RANKL pathway and systemic inflammation in COPD patients with emphysema and osteoporosis

Variables COPD with normal BMD (n = 36) COPD with low BMD (n = 44) p-value
Age(yr) 65.5 ± 5.1 67.8 ± 5.2 0.049
BMI(kg/m2) 26.1 ± 3.6 23.5 ± 2.9 < 0.001
Smoking index(pack-yr) 28.1 ± 26.0 26.7 ± 21.6 0.79
CAT score 15.8 ± 9.6 21.0 ± 8.5 0.01
BODE index 3.3 ± 1.1 4.1 ± 1.2 0.26
FEV1/FVC(%) 57.0 ± 10.1 53.9 ± 9.6 0.17
FEV1 % predicted(%) 58.4 ± 19.2 52.8 ± 17.3 0.18
  1. Data are mean (SD) unless otherwise stated.
  2. COPD: chronic obstructive pulmonary disease, BMD: bone mineral density, BMI: body mass index, CAT: COPD Assessment Test, BODE index: body mass index, airflow obstruction, dyspnea, and exercise capacity index, FEV1: forced expiratory volume in one second