Fig. 3

Bland–Altman plot for eGFRs by different equations comparisons according to age. Differences were plotted between eGFR by two of CKD-EPI, FAS, and Xiangya equations in participants aged A 18–29 years, B 30–39 years, C 40–49 years, D 50–59 years, E 60–69 years, and F ≥ 70 years. The blue solid line represents the mean of the differences. The red dashed line indicates 1.96 standard deviations around the mean differences. CKD-EPI: chronic kidney disease epidemiology collaboration equation based on serum creatinine; FAS: full age spectrum based on serum creatinine and age