TTR and hyperuricemia: The best multiple linear regression model of TTR (both in terms of highest adjusted R squared and lowest model p value and AIC) included only hyperuricemia (p = 0.0000007), non-linear age (natural splines, p = 0.0006) and binary proteinuria (p = 0.02) and a positive interaction between binary proteinuria and uricemia (p = 0.004) as significant predictors of TTR.