Background: Older individuals are seemingly having more medical conditions, which predispose them to a greater risk of polypharmacy. Potentially inappropriate medications (PIMs), including those having anticholinergic and sedative properties, are common in their prescriptions, often associated with functional decline and negative health outcomes. Thus, this study reports proportions of inappropriate drugs and drug burden exposures and its correlation with patient-reported outcomes (PROs) among cognitively intact older adults admitted to a ward or visiting the outpatient clinic at a tertiary care hospital in Malaysia.
Methods: This cross-sectional study included data from 344 older (173 inpatients and 171 outpatients) patients, aged 60 years and above, through validated questionnaires. Medication appropriateness was assessed via Medication Appropriateness Index (MAI) tool, whereas Beers and Screening Tool of Older Person's Potentially Inappropriate Prescribing (STOPP) criteria were used to evaluate PIMs and potentially inappropriate prescribing (PIP), respectively. The Drug Burden Index (DBI) and polypharmacy, as well as PROs, included Groningen Frailty Indicator (GFI), Katz Index of Independence in Activities of Daily Living (Katz ADL) and Older People's Quality of Life (OPQOL) were also evaluated.
Results: Overall, inpatients received significantly higher medications (6.90 ± 2.70 vs 4.49 ± 3.20) than outpatients. A significantly higher proportion of inpatients received at least one PIM (65% vs 57%) or PIP (57.4% vs 17.0%) and higher mean MAI score (1.76 ± 1.08 and 1.10 ± 0.34) and DBI score (2.67 ± 1.28 vs 1.49 ± 1.17) than outpatients. Inpatients had significantly higher total OPQOL (118.53 vs 79.95) and GFI score (5.44 vs 3.78) than outpatients. We only found significant correlations between GFI and DBI and total OPQOL and the number of PIMs.
Conclusions: Proportions of PIMs and DBI exposure were significantly higher in an inpatient setting. No significant correlations between exposures to inappropriate medications or drug burden and PROs were observed.
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