Nondiabetic older adults with untreated hypertension in Taiwan: Treatment implication in elderly hypertension

Li Ning Peng, Chien Liang Liu, Ming Hsien Lin, Shinn Jang Hwang, Liang Kung Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Background: Hypertension is common and often left undiagnosed in the elderly. The main purpose of this study was to evaluate the clinical characteristics of nondiabetic hypertensive older adults. Methods: Community-living older adults in Taipei City participating in annual health examinations were invited for study. Subjects with diabetes mellitus, whether treated or newly diagnosed, were excluded for further analysis. All participants were classified into three groups: normotension, untreated hypertension (UH), and treated hypertension (TH). Results: In total, 3244 subjects (mean age: 73.4 ± 5.4 years, 56.2% males) were enrolled. The prevalence of hypertension, chronic kidney disease (CKD), and left ventricular hypertrophy (LVH) was 52.9% (36.1% TH and 16.8% UH), 20.9%, and 6.2%, respectively. Compared with the normotension group, UH subjects were older (73.8 ± 5.5 years vs. 72.9 ± 5.6 years, p = 0.003); having higher body mass index (24.2 ± 3.4 kg/m2 vs. 23.6 ± 3.4 kg/m2, p = 0.001), fasting glucose (101.7 ± 9.1 mg/dL vs. 100.5 ± 9.0 mg/dL, p = 0.007), total cholesterol (TC) (205.0 ± 37.8 mg/dL vs. 196.5 ± 36.4 mg/dL, p < 0.001), triglyceride (TG) (134.5 ± 84.9 mg/dL vs. 119.4 ± 77.0 mg/dL, p < 0.001); and higher prevalence of overt proteinuria (19.3% vs. 13.5%, p = 0.001), CKD (21.1% vs. 16.6%, p = 0.025), and LVH (8.1% vs. 3.8%, p < 0.001). However, the prevalence of overt proteinuria (19.3% vs. 21.1%, p = 0.378) and LVH (8.1% vs. 8.5%, p = 0.79) between UH and TH groups was similar. Adjusted for age, TC, TG, fasting plasma glucose, and the incidence of LVH, both UH [odds ratio (OR) = 1.30, 95% confidence interval (CI) = 1.01-1.66, p = 0.040] and TH (OR = 1.69, 95% CI = 1.39-2.05, p < 0.001) were significant risk factor for CKD. In addition, independent risk factors for CKD included age (OR = 1.07, 95% CI = 1.05-1.09, p < 0.001), body mass index (OR = 1.07, 95% CI = 1.04-1.10, p < 0.001), TC (OR = 1.003, 95% CI = 1.001-1.005, p = 0.021), TG (OR = 1.002, 95% CI = 1.001-1.003, p < 0.001), and hypertension (TH or UH) (OR = 1.44, 95% CI = 1.20-1.72, p < 0.001). Conclusion: In conclusion, risk of CKD existing along with blood pressure rises among nondiabetic older hypertensive adults, and hypertension (TH or UH) carries a significant risk of CKD after adjustment of other cardiovascular risk factors. Renal protection should be highlighted in the antihypertensive treatment strategy in older hypertensive patients.

Original languageEnglish
Pages (from-to)58-61
Number of pages4
JournalJournal of Clinical Gerontology and Geriatrics
Volume2
Issue number2
DOIs
StatePublished - Jun 2011

Keywords

  • Blood pressure
  • Chronic kidney disease
  • Elderly
  • Hypertension
  • Left ventricular hypertrophy

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