A predictive model for identifying low medication adherence among older adults with hypertension: A classification and regression tree model

Han Yu Chu, Hui Chuan Huang, Chun Yao Huang, Ching Chi Chu, Chien Tien Su, I. Lin Tsai, Huey Lan Sophia Hu, Shu Liu Guo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Various individual characteristics may affect medication adherence; however, few studies have investigated the effect of interrelationships among these various individual characteristics on medication adherence. This cross-sectional study explored the interrelationships among risk factors for medication adherence and established a predictive model of low medication adherence among older adults with hypertension. Convenience sampling was used to recruit 300 older adults with hypertension. The following parameters were recorded: demographic and disease characteristics, health beliefs, self-efficacy, social support, and medication adherence of antihypertensive drugs. Classification and regression tree (CART) analysis was performed to develop a predictive model of low medication adherence. The CART model revealed that health belief, disease duration, self-efficacy, and social support interacted to contribute to various pathways of low medication adherence. The predicted accuracy of the model was validated with a low misclassification rate of 26%. The proposed classification model can help identify risk cases with low medication adherence. Suitable health education programs based on these risk factors to manage and improve medication adherence for older adults with hypertension could be considered.

Original languageEnglish
Pages (from-to)1309-1315
Number of pages7
JournalGeriatric Nursing
Volume42
Issue number6
DOIs
StatePublished - 1 Nov 2021

Keywords

  • Compliance
  • Diabetes mellitus
  • Hypertension
  • Medication adherence
  • Primary care
  • Quality of life

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