No increased mortality risk in older persons with unexplained anaemia.

Abstract:

BACKGROUND:in older persons, anaemia is associated with a number of unfavourable outcomes. In approximately 30% of older persons with anaemia, the cause of the anaemia is unexplained. We assessed the clinical differences between subjects with explained and unexplained anaemia and investigated whether these subjects have different mortality patterns compared with subjects without anaemia. DESIGN:observational prospective follow-up study. SETTING:the Leiden 85-plus study. PARTICIPANTS:four hundred and ninety-one persons aged 86 years. METHODS:the study population was divided in three groups: (i) no anaemia (reference group, n=377), (ii) explained anaemia (iron deficiency, folate deficiency, vitamin B12 deficiency, signs of myelodysplastic syndrome or renal failure, n=74) and (iii) unexplained anaemia, (n=40). Mortality risks were estimated with Cox-proportional hazard models. RESULTS:haemoglobin levels were significantly lower in subjects with explained anaemia than in subjects with unexplained anaemia (P<0.01). An increased risk for mortality was observed in subjects with explained anaemia [HR: 1.93 (95% CI: 1.47-2.52), P<0.001], but not in subjects with unexplained anaemia [HR: 1.19 (95% CI: 0.85-1.69), P=0.31]. Adjusted analyses (sex, co-morbidity, MMSE, institutionalised and smoking) did not change the observed associations for both explained and unexplained anaemic subjects. CONCLUSION:older subjects with unexplained anaemia had similar survival compared with non-anaemic subjects. Increased mortality risks were observed in subjects with explained anaemia compared with non-anaemic subjects.

journal_name

Age Ageing

journal_title

Age and ageing

authors

Willems JM,den Elzen WP,Vlasveld LT,Westendorp RG,Gussekloo J,de Craen AJ,Blauw GJ

doi

10.1093/ageing/afs031

subject

Has Abstract

pub_date

2012-07-01 00:00:00

pages

501-6

issue

4

eissn

0002-0729

issn

1468-2834

pii

afs031

journal_volume

41

pub_type

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