Increased risk of digoxin toxicity following hospitalization.

Abstract:

PURPOSE:Adverse drug events (ADEs) are an important cause of preventable hospitalizations among elderly individuals taking high-risk medications. The objective of the study was to identify health care system factors that affect the risk of digoxin toxicity for older adults on digoxin. METHODS:We conducted a prospective cohort study of older adults within the Pennsylvania Pharmaceutical Assistance Contract for the Elderly (PACE) program, which provides comprehensive drug benefits for older adults with low income. Subjects were interviewed at the time of enrollment regarding the management and coordination of their health care as well as medication comprehension. Hospitalizations were identified by linking patient identifiers to a state-wide registry. Trained abstractors reviewed discharge summaries of possible digoxin related ADEs. Unadjusted and adjusted incidence rate ratios (IRR) were calculated based on person-months of exposure using Poisson regression models, with variances adjusted for within subject repeated measures. RESULTS:We enrolled a total of 2030 adults on digoxin from May 2002 to June 2003. A total of 34 hospitalizations due to digoxin toxicity occurred, equivalent to 1.12 hospitalizations per 1000 person-months of exposure. Adjusting for hospitalization in the past 2 months, age, total number physicians prescribing any medications in past 3 months, total number of pharmacies filling medications in past 3 months, and number of unique prescriptions filled in the past month had a 4.25-fold increased risk of subsequently experiencing digoxin toxicity (IRR 95%CI 1.95, 9.27). CONCLUSIONS:The risk of digoxin toxicity-related hospitalization, while low, is higher in the post-hospital period.

authors

Haynes K,Hennessy S,Localio AR,Cohen A,Leonard CE,Kimmel SE,Feldman HI,Strom BL,Metlay JP

doi

10.1002/pds.1680

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

28-35

issue

1

eissn

1053-8569

issn

1099-1557

journal_volume

18

pub_type

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