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Table 1 Baseline patient characteristics

From: Correlations between disease-specific and generic health status questionnaires in patients with advanced COPD: a one-year observational study

  Total sample (n = 105) Study completed (n = 86) Dropout (n = 19) p-valuec
Male, n (%) 65 (61.9) 54 (62.8) 11 (57.9) 0.69
Age, years 66.3 (9.2) 65.7 (9.3) 68.8 (8.2) 0.18
BMI, kg/m2 d 26.3 (6.7) 26.5 (6.9) 25.5 (5.4) 0.99
Current smokers, n (%) 26 (24.8) 23 (26.7) 3 (15.8) 0.69
FEV1,% predictedd 34.1 (13.5)a 34.4 (13.6)b 32.7 (13.1) 0.60
Charlson index, points 2.5 (1.7) 2.4 (1.7) 2.7 (1.7) 0.50
Long-term oxygen therapy, n (%) 62 (59.0) 53 (61.6) 9 (47.4) 0.26
Borg scale (dyspnea), points 4.8 (2.0) 4.8 (2.0) 4.9 (2.1) 0.79
Borg scale (fatigue), points 4.6 (2.5) 4.4 (2.4) 5.3 (2.8) 0.15
HADS-A score, points 5.9 (4.5) 5.5 (4.2) 7.5 (5.6) 0.16
HADS-D score, points 6.3 (4.0) 6.0 (4.0) 7.7 (3.4) 0.10
Self-perceived mobility problems, n (%) 89 (84.8) 72 (83.8) 17 (89.5) 0.33
Dependent in personal care, n (%) 47 (44.8) 33 (38.4) 14 (73.6) 0.009
  1. Values expressed as mean (standard deviation [SD]), number of patients (n), proportion (%).
  2. Abbreviations: BMI, body mass index; FEV1, forced expiratory volume in the first second; HADS-A, Hospital Anxiety and Depression Scale, Anxiety subscale; HADS-D, Hospital Anxiety and Depression Scale, Depression subscale. a n = 102; b n = 83; c comparison between patients who completed the study and patients who withdrew from the study; d non parametric statistic tests were used because of skewed data.