Most of the studies that evaluate the association between red blood cell distribution width (RDW) and mortality assess it on a single occasion instead of doing so through serial measurements. Very few studies have investigated repeated measurements of RDW and its prognostic value, and most of them are focused on patients with cardiovascular diseases. RDW is a dynamic value so we aimed at determining the prognostic value of sequential RDW assessment in the last years of life in patients enrolled in a Department of Geriatrics.

This work is part of a prospective study derived from a cohort of 122 patients over 75 years hospitalized in 2005 for the purpose of assessing the prognostic significance of several comorbidity and prognostic indices.

Patients were consecutively recruited for the study at admission in a tertiary hospital and then followed up for at least 5 years.

A total of 55 patients with repeated RDW assessments during all the five years before their death were selected from the total cohort of 122 patients.

We found a strong correlation between progressive rise in RDW and mortality risk, especially during the last year of life. There was a gradual significant increase in the RDW values along the last five years of life, with means growing up from 14,8 (95% CI: 13,98-15.62) to 16,37 (15,80-16,94).

In our cohort of geriatric patients, RDW is a dynamic variable that is modified during the last five years of life, irrespective of their age, and especially during the last year.