Common combinations of medications used among oldest-old women: a population-based study over 15 years

AGING CLINICAL AND EXPERIMENTAL RESEARCH(2020)

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摘要
Background Older people use many medications, but combinations of medications used among the oldest old (≥ 80 years) are not commonly reported. Aims This study aimed to determine common combinations of medications used among women aged 77–96 years and to describe characteristics associated with these combinations. Methods A cohort study of older women enroled in the Australian Longitudinal Study on Women’s Health over a 15-year period was used to determine combinations of medications using latent class analysis. Multinomial logistic regression was used to determine characteristics associated with these combinations. Results The highest medication users during the study were for the cardiovascular (2003: 80.28%; 2017: 85.63%) and nervous (2003: 66.03%; 2017: 75.41%) systems. A 3-class latent model described medication use combinations: class 1: ‘Cardiovascular & neurology anatomical group’ (27.25%) included participants using medications of the cardiovascular and nervous systems in their later years; class 2: ‘Multiple anatomical group’ (16.49%) and class 3: ‘Antiinfectives & multiple anatomical group’ (56.27%). When compared to the reference class (class 1), the risk of participants being in class 3 was slightly higher than being in class 2 if they had > 4 general practitioner visits (RRR 2.37; 95% CI 2.08, 2.71), Department of Veterans Affairs’ coverage (RRR 1.59; 95% CI 1.36, 1.86), ≥ 4 chronic diseases (RRR 3.16; 95% CI 2.56, 3.90) and were frail (RRR 1.47; 95% CI 1.27, 1.69). Conclusion Identification of combinations of medication use may provide opportunities to develop multimorbidity guidelines and target medication reviews, and may help reduce medication load for older individuals.
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关键词
Ageing,Older people,Medication combinations,Medication pattern,Medication use
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