Fig. 3From: Positive associations between different circulating trans fatty acids (TFAs) and urinary albumin excretion among adults in the U.S.: a population-based studySmooth curve fitting for TFAs and ACR on the fully adjusted model. Non-linear relationship between TFAs and ACR was detected by the generalized additive model. The solid red line represented the smooth fitting curve between variables, and the blue band represented the 95% CI of the fittingBack to article page