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Table 9 Regression equation using FEV1 as dependent variable and respectively FEV0.75 and FEV0.5 as predictive

From: Reference values of Forced Expiratory Volumes and pulmonary flows in 3–6 year children: a cross-sectional study

Parameter β CI 95% a CI 95% R2
FEV0.75 1.06 (+1.04; +1.08) -0.01 (-0.02; +0.02) 0.950
FEV0.5 1.17 (+1.13; +1.21) 0.04 (+0.01; +0.08) 0.870
  1. R2 = determination coefficient (proportion of explained variance);
  2. a = intercept or constant and β = regression coefficient;
  3. FEV0.75 = forced expiratory volume in 3/4 of a second;
  4. FEV0.5 = forced expiratory volume in half a second.