Factors associated with knowledge and control of arterial hypertension in the Canary Islands

Abstract

Introduction and objectives: To analyze the factors associated with knowledge and control of hypertension in the adult population of the Canary Islands (18-75 years).

Methods: We recruited a random sample of the general population aged ≥18 years. Hypertension was defined as systolic/diastolic blood pressure ≥140/90 mmHg or known hypertension (self-declared, or controlled hypertension <140/90 mmHg). The bivariate association of known and controlled hypertension with age, sex, anthropometry, serum lipids, medication, and lifestyle was corroborated by adjusting a multivariate logistic model.

Results: We included 6675 participants. The prevalence of hypertension was higher in men (40% vs 31%, P<.001), who also had a lower frequency of treated and controlled hypertension. Female sex (P<.001), age ≥55 years (P<.001), obesity (P<.001), and diabetes (P<.001) were associated with known hypertension. The modifiable factors that, in spite of treatment, increased the risk of poor control of hypertension were alcohol consumption (>30 g/day, odds ratio [OR]=2.4, P<.001; >15-≤30 g/day, OR=2, P=.009; >5-≤15, g/day, OR=1.83, P=.004), obesity (body mass index ≥30, OR=2, P=.003; >24.9-<30, OR=1.7, P=.024), serum cholesterol >250 mg/dL (OR=1.6, P=.006) and elevated heart rate (>80 bpm, OR=1.45, P=.045; >70-≤80 bpm, OR=1.36, P=.038).

Conclusions: The awareness of hypertension increases with frequent use of the health system and with factors associated with known hypertension: female sex, age, underlying health problems. The modifiable factors associated with poor control of known hypertension are alcohol consumption, obesity, elevated heart rate, and hypercholesterolemia.