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Table 3 Impact of evaluated variables on survival of COPD patients at the four stages 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

1.05* (1.02 - 1.08)

< 0.001

Sex

0.68** (0.44 - 1.05)

0.08

BMI (kg/m2)

0.98 (0.94 - 1.02)

0.32

PaO2 kPa (air)

0.85 (0.70 - 1.02)

0.09

PaCO2 kPa (air)

0.84 ( 0.64 - 1.09)

0.19

LTOT

2.33 (1.44 - 3.77)

< 0.001

COPD GOLD stage

  

  1 (FEV1 ≥ 80% predicted)

1.0 (ref.)

 

  2 (FEV1 50–80% predicted)

1.90 (0.57 - 6.35)

0.30

  3 (FEV1 30–50% predicted)

3.41 (1.30 - 11.25)

0.04

  4 (FEV1 < 30% predicted)

1.84 (0.47 - 7.14)

0.38

  1. Abbreviations see Tables 1 and 3.
  2. The variables were mutually adjusted for all other variables in the table.
  3. *5 years; **Male served as reference.