ALB and peritonitis: After adjustment for demographic characteristics (age, duration on PD), laboratory parameters (WBC, albumin, ferritin, and dialysate WBC on day 3), and infection type (Gram-positive, Gram-negative, or culture negative peritonitis), higher levels of RDW (3-level categorical variable) were independently associated with greater rates of treatment failure (logistic regression, p for trend = .045; GEE, p for trend = .019) (Figure 1).