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. 2013 Nov 19;14(1):131. doi: 10.1186/1465-9921-14-131

Table 5.

Relationship between functional variables and densitometric quantification of emphysema by multivariate linear regression model with stepwise selection

Variables Partial R 2 value Model R 2 value p value
1.
  
  
  
  AC, degrees
 0.1938
 0.1938
 <.0001
  KCO, %predicted
 0.0404
 0.2342
 <.0001
2.
  
  
  
  AC, degrees
 0.1939
 0.1939
 <.0001
  FEV1/FVC
 0.0074
 0.2013
 0.0385
  FEV1, %predicted 0.0083 0.2097 0.0280

1/ Variables of spirometry (initial model: AC, FVC,%pred, FEV1,%pred, FEV1/FVC); 2/ Variables of spirometry and diffusion capacity (initial model: AC, FVC,%pred, FEV1,%pred, FEV1/FVC, DL,CO,%pred, KCO,%pred).