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Table 4 Correlation matrix for lung function parameters, HRQoL, MRC Dyspnoea scale and age

From: Co-morbidities are the key nominators of the health related quality of life in mild and moderate COPD

  15D score Age DLCOcVA FEV1% MRC scale FEV1*DLCOcVA AQ20 score
15D Score 1 0.01 0.11* 0.16*** -0.03 0.15** -0.69***
Age 0.01 1 -0.07 -0.19*** 0.02 -0.17** -0.09
DLCOcVA 0.11* -0.07 1 0.35*** 0.03 0.79*** -0.19***
FEV1% 0.16** -0.19*** 0.35*** 1 0.00 0.83*** -0.24***
MRC Scale -0.03 0.02 0.03 0.00 1 0.01 0.07
FEV1*DLCOcVA 0.15** -0.17** 0.79*** 0.83*** 0.01 1 -0.25***
AQ20 Score -0.69*** -0.09 -0.19*** -0.24*** 0.07 -0.25*** 1
  1. *p-value < 0.05, **p < 0.01, ***p < 0.001.