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Table 5 Relationship between functional variables and densitometric quantification of emphysema by multivariate linear regression model with stepwise selection

From: Computer quantification of airway collapse on forced expiration to predict the presence of emphysema

Variables Partial R2value Model R2value 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. 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).