Figure 1.

Probability of overall survival according to red cell distribution width and other risk factors. The separation of red cell distribution width (RDW) values into quartiles (A) demonstrates a clear split in the overall survival (OS) probability between the first quartile (RDW <13.4%) and the remaining quartiles, which overlap each other (B) (see also Table 1). Other previously described risk factors of adverse survival such as Karnofsky performance score <80% (C), National Institutes of Health lung score 3 (D), and moderately to severely decreased kidney function (E) defined by estimated glomerular filtration rate (eGFR) <45 mL/min/1.73m² (calculated according to Chronic Kidney Disease Epidemiology Collaboration 2021 equation) are presented for comparison of impact on OS. *P value adjusted to account for three implicit cut-points that could have been used when dividing the groups into quartiles.