Table 3 Linear regression model predicting tar yield for brands purchased in the United States, the United Kingdom and Canada
Δ-R2Fp ValueB95% CI Bp Value
Intercept4.050.07 to 8.040.05
Ventilation (%)0.82512.8<0.001−0.16−0.18 to −0.15<0.001
Tobacco weight (mg)0.0430.6<0.0010.0080.003 to 0.0130.003
Rod density (mg/cm3)0.0112.50.0010.030.01 to 0.050.002
Overwrap (mm)0.0043.30.071−0.16−0.33 to 0.010.071