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. 2015 Jan 13;3:e705. doi: 10.7717/peerj.705

Figure 1. Predictor collinearity and correlation with cancer incidence.

Figure 1

Predictors displayed expected correlations such as a strong positive correlation between obesity and diabetes. Collinearity was moderate but pervasive. Elevation covaried with most variables including cancers indicating the need to adjust for covariates while carefully considering collinearity. Besides radon, the correlation of elevation with other predictors did not exceed |ρ| = 0.55.