Introduction Hypertension is a major risk factor for cardiovascular disease. Despite the availability of various classes of anti-hypertensive medications, blood pressure (BP) control often remains poor. Lifestyle changes, if adopted, are effective at reducing BP. The aim of this study was to estimate the factors associated with inadequate BP control in hypertensive patients adherent to anti-hypertensive drug treatment assisted by a Brazilian Family Doctor Program (FDP).
Methods A cross-sectional study of men and women aged 20 years and over collected data on sociodemographic characteristics, co-morbidities, lifestyle and food frequency, the latter using a questionnaire validated for the investigation of dietary habits. Blood and urine samples were obtained and anthropometric and nutritional studies performed.
Results Independent of time of treatment and systolic BP at admission to FDP, individuals with inadequate BP control had a higher body mass index (BMI) (Prevalence Ratio, PR 1.027 (95% CI 1.009 to 1.045)), consumed more meat (PR 1.091 (1.022 to 1.165)), had higher levels of serum creatinine (PR 1.894 (1.241 to 2.892)) and more often had white skin colour (PR 1.363 (1.006 to 1.847)). Following adjustment for the sodium excretion index, an indirect measure of salt intake, there association with meat was no longer significant.
Conclusion Inadequate control of BP in patients who were being treated with anti-hypertensive drugs, even in a community assisted by a primary care program, was independently associated with modifiable factors including salt consumption and BMI. An association with skin colour and serum creatinine was also observed.
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