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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