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Table 2 Impact of evaluated variables on survival of COPD patients in the three pulmonary rehabilitation programs according to Cox regression analysis (n = 193)

From: Retrospective survival in elderly COPD patients receiving pulmonary rehabilitation; a study including maintenance rehabilitation

  HR(95% CI) P-value
Age 1.06* (1.03 - 1.09) < 0.001
Sex 0.88** (0.56 - 1.38) 0.57
BMI (kg/m2) 0.99 (0.95 - 1.03) 0.59
FEV1 % predicted 0.98*** (0.97 - 1.00) 0.01
PaO2 kPa (air) 0.88 (0.73 - 1.07) 0.21
PaCO2 kPa (air) 0.77 (0.59 - 1.01) 0.06
LTOT 2.18 (1.33 - 3.56) 0.005
PR program   
  In-patient 0.89 (0.53 - 1.50) 0.65
  Out-patient 0.75 (0.44 - 1.28) 0.30
  Maintenance 1.0 (ref.)  
  1. The variables were mutually adjusted for all other variables in the table.
  2. HR = hazard ratio; CI = confidence interval; LTOT = long term oxygen therapy;
  3. Ref. = reference; for other abbreviations see Table 1.
  4. *5 years; **Male served as reference; ***10%.