Soohoo M, et al. - Researchers used adjusted Cox models to explore the association of baseline and time-varying red blood cell distribution width (RDW) with the risk of mortality and time to first hospitalization among 14,323 incident peritoneal dialysis (PD) patients between 2007 and 2011 in the USA. In addition, they used an adjusted negative-binomial regression model to study the relationship of baseline RDW and hospitalization rate. They also performed sensitivity analyses including competing risk models and subgroup analyses. They found a higher risk of mortality and hospitalizations among incident PD patients in relation to the presence of higher RDW.