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Table 3 Variables included in the final general linear models for age-adjusted annual incidence rates of ER+ and ER- breast cancer.

From: Estrogen receptor positive breast cancers and their association with environmental factors

Predictor Coefficient T p- Value VIF* R2 = 1 - 1/VIF
ER+ final model      
Constant 255.53 8.25 <0.001 NA  
Crop density 31.89 2.62 0.009 2.264 55.80%
Vapor pressure -0.0415 -7.25 <0.001 5.753 82.60%
Precipitation 0.11647 2.78 0.006 4.132 75.80%
Radiation -7.219 -5.21 <0.001 4.358 77.10%
HDD -0.0094 -5.21 <0.001 5.477 81.70%
Mortality heart disease -0.2766 -4.56 <0.001 1.466 31.80%
Unemployment rate -2.0359 -3.57 <0.001 1.669 40.10%
EPA cancer risk 267850 3.26 0.001 1.424 29.80%
Precip X crop density -0.2302 -2.01 0.045 NA  
ER- final model      
Constant -35.86 -0.82 0.413   
Crop density 3.127 1.78 0.075   
Vapor pressure -0.01268 -4.63 <0.001   
Radiation 13.333 2.22 0.027   
HDD -0.00258 -2.99 0.003   
Mortality heart disease 0.05211 1.72 0.086   
Unemployment rate -0.9082 -3.21 0.001   
RAD^2 -0.5252 -2.61 0.009   
  1. *The variance inflation factors and the R2 for each main effects variable were calculated for a model with only main effects. NA = not applicable