The association between the difference in hemoglobin levels before and after hemodialysis (ΔHb) stratified with the pre-hemodialysis (HD) hemoglobin level and all-cause mortality.

The model was adjusted with age, sex, HD duration, cause of end-stage renal disease, history of cardiovascular disease or amputation, body mass index, serum albumin level, time of HD session, blood urea nitrogen, serum creatinine, serum sodium, serum potassium, adjusted calcium, phosphate, C-reactive protein, protein catabolic rate, Kt/V, the amount of fluid removal, and type of blood access.