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Table 1 Characteristics of COPD patients followed for a three-year period

From: Three-year follow-up of Interleukin 6 and C-reactive protein in chronic obstructive pulmonary disease

Variables Initial assessment (n = 53) Final assessment (n = 53) p-value
FEV1 (%) 56.0 ± 21.1 56.0 ± 22.6 0,48
FEV1 (l) 1.4 ± 0.7 1.3 ± 0.6 0.03
FVC (%) 88.9 ± 20.9 86.3 ± 24.3 0.20
FVC (l) 2.6 ± 0.9 2.5 ± 0.9 0.01
FEV1/FVC 50.5 ± 12.1 50.2 ± 10.6 0.49
SpO2 (%) 93.0 ± 3.1 91.6 ± 4.9 0.02
MMRC (score) 1.6 ± 1.0 2.0 ± 1.2 0.01
6MWD (m) 444.0 ± 82.8 406.3 ± 102.9 <0.001
BMI (kg/m2) 25.6 ± 5.5 25.5 ± 5.4 0.38
BODE index 2.4 ± 1.9 2.9 ± 2.5 0.01
  1. Comparisons of patient characteristics at baseline and after three years were performed by Paired t-test or Wilcoxon; p ≤ 0.05. Values are presented as mean ± SD. Definition of abbreviations: FEV1 = forced expiratory volume in the first second (% of predicted); FVC = forced vital capacity (% of predicted); SpO2 = pulse oximeter oxygen saturation; MMRC = Modified Medical Research Council; 6MWD = six-minute walking distance; BMI = body mass index.