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

From: Predictors of health status do not change over three-year periods and exacerbation makes difference in chronic obstructive pulmonary disease

Variables Initial Assessment (n = 95) Final Assessment (n = 95) p-value
FEV1 (%) 59.3 ± 23.2 58.5 ± 22.7 0.228
FEV1 (L) 1.4 ± 0.6 1.3 ± 0.5 < 0.001
FVC (%) 90.8 ± 23.8 88.9 ± 24.7 0.167
FVC (L) 2.7 ± 0.8 2.5 ± 0.8 0.004
FEV1/FVC 52.2 ± 11.7 51.3 ± 10.4 0.123
BMI (kg/m2) 25.9 ± 5.8 25.8 ± 5.6 0.382
SpO2 (%) 93.6 ± 3.1 92.0 ± 4.8 < 0.001
MMRC (score) 1.5 ± 1.0 1.9 ± 1.1 0.002
6MWD (m) 437.7 ± 85.6 412. 4 ± 100.0 0.001
Charlson index (score) 3.5 ± 1.5 3.9 ± 1.4 0.009
BODE index (score) 2.2 ± 1.8 2.6 ± 2.3 0.008
  1. Paired t-test or Wilcoxon. Values are presented as mean ± SD or as median (25-75% interquartile range). FEV1: forced expiratory volume in the first second (% of predicted); FVC: forced vital capacity (% of predicted); BMI: body mass index; SpO2: pulse oximetry; MMRC: Modified Medical Research Council; 6MWD: six-minute walking distance; p < 0.05.