Trends in the prevalence of AF in U.S. patients receiving hemodialysis, 1992 to 2006. (A) Prevalence of AF among all prevalent hemodialysis patients on December 31 of 15 consecutive years: comparison of three different algorithms to ascertain AF. Prevalence of AF, defined by more than two diagnosis codes in the same calendar year, among prevalent hemodialysis patients on December 31 of 15 consecutive years by (B) age group, (C) gender, (D) race, (E) dialysis vintage, and (F) diabetes.