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Table 6 Pearson's correlation coefficients (r)

From: Health-related quality of life is related to COPD disease severity

 

SF-36 PCS

SF-36 MCS

SGRQ Total

EQ-5D VAS

EQ-5D index

FEV1 % predicted

FVC % predicted

SF-36 PCS

1.0

--

--

--

--

--

--

SF-36 MCS

0.22

1.0

--

--

--

--

--

SGRQ Total

-0.62

-0.42

1.0

--

--

--

--

EQ-5D VAS

0.73

0.49

-0.63

1.0

--

--

--

EQ-5D index

0.64

0.58

-0.61

0.68

1.0

--

--

FEV 1 % predicted

0.30

0.10

-0.34

0.38

0.26

1.0

--

FVC % predicted

0.32

0.08

-0.37

0.36

0.22

0.81

1.0