Figure 1

The cumulative incidences of incident atrial fibrillation by the quartiles of GFR-VIM. Compared to the individuals with the lowest variability of renal function (Q1), those with the highest variability of renal function (Q4) had higher crude incidence rates of atrial fibrillation. Abbreviation: AF = atrial fibrillation; eGFR = estimated glomerular filtration rate calculated by MDRD equation; GFR-VIM = variability independent of mean of eGFR.