Predicted probability of anemia, stratified by the severity of albuminuria using categorical classifications and nonlinear change of estimated glomerular filtration rate, with 95% confidence intervals. (A) Predicted probability of anemia after adjustment for age and sex, stratified by the categories for estimated glomerular filtration rate, based on the severity of albuminuria. (B) Predicted probability of anemia after adjustment for age and sex along with nonlinear estimated glomerular filtration rate, according to the severity of albuminuria. (C) Predicted probability of anemia after adjustment for age, sex, comorbidities, and medications stratified by the categories for estimated glomerular filtration rate, according to the severity of albuminuria. (D) Predicted probability of anemia after adjustment for age, sex, comorbidities, and medications, along with nonlinear estimated glomerular filtration rate, according to the severity of albuminuria. * P-value < .05, ** P-value < .01, *** P-value < .001, n.s., not statistically significant. All data are expressed as point estimates with 95% confidence intervals. Differences in the estimated glomerular filtration rate among the same estimated glomerular filtration rate categories were controlled in both models.