4.4 Article

Relationship between number of drugs and duration of hospital stay in older patients with neuromuscular diseases

Journal

GERIATRICS & GERONTOLOGY INTERNATIONAL
Volume 18, Issue 7, Pages 1018-1024

Publisher

WILEY
DOI: 10.1111/ggi.13292

Keywords

adverse drug reactions; elderly patients; multidrug therapy; neuromuscular disease; time to discharge

Funding

  1. JSPS KAKENHI [17H00529, JP2640861, JP17K09231]
  2. Grants-in-Aid for Scientific Research [17H00529] Funding Source: KAKEN

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AimOlder patients are considered to be at high risk for developing adverse drug reactions (ADR), because they commonly receive multidrug therapy despite changes in pharmacokinetic function with age. In the present study, we assessed the relationship between the number of prescribed drugs and the incidence of ADR or the time to discharge in older patients with neuromuscular disease. MethodsA retrospective study was carried out among 135 older patients (aged 65years) who were admitted to the neurology ward from October 2007 through December 2011. Drugs that possess a high risk for initiation of grade 2 ADR were determined using logistic regression analysis. ResultsA total of 38 patients (28.1%) experienced grade 2 ADR. Multivariate logistic regression analysis showed that corticosteroids, antibiotics, enteric nutrients and insulin were significant risks for grade 2 ADR. Notably, the time to discharge extended as the grade of ADR increased, with mean values of 24.4days for grade0, 38.3days for grade1, 47.5days for grade2 and 73.1days for grade3-4 events. Furthermore, the number of high-risk drugs for grade2 ADR correlated well with the incidence of grade2 events (R=0.964, P=0.008), as well as with the time to discharge (R=0.473, P<0.001). ConclusionsOlder patients receiving multidrug therapy using corticosteroids, antibiotics, enteric nutrients, or insulin were at high risk for grade2 ADR and prolongation of hospital stay. Geriatr Gerontol Int 2018; 18: 1018-1024.

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