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Table 2 Correlation coefficients of factors that showed significant correlations with the functional dyspnea score as determined with the Modified Medical Research Council scale.

From: Gender and respiratory factors associated with dyspnea in chronic obstructive pulmonary disease

Clinical and Physiological Parameter

Correlation coefficient*

 

Men

Women

BMI

-0.29

-0.28

ffmi

-0.39

ns

FEV 1 %

-0.64

-0.45

FVC %

-0.45

-0.33

IC/TLC

-0.52

-0.27

DLCO

-0.54

ns

PaO 2

-0.59

ns

PaCO 2

0.27

ns

P 0.1 /P imax

0.47

0.46

VAS pre 6MWD

0.37

0.52

VAS post 6MWD

0.52

0.48

  1. Estimated by Spearman's rank or tau-b Kendall linear correlation coefficients; ns = stastistically non significant