A cross-sectional study of blood pressure control in hypertensive patients in general practice (the I-TARGET study)
INTRODUCTION
Despite the availability of multiple effective antihypertensive drugs, hypertension control rates remain poor. The reasons for this are complex, but increasingly, physician inertia has been identified as a crucial factor. In this study we attempted to define the level of blood pressure (BP) control and reasons for not achieving control in a survey of selected general practices within South Africa.


METHODS
This was a multi-centre, cross-sectional disease study involving 15 selected general practices throughout South Africa. Treated hypertensive patients over 18 years old were eligible for inclusion. The study was approved by Pharma Ethics, and after informed consent, consecutive hypertensive patients at the participating general practice centres were included, with each centre enrolling 30 patients.


RESULTS
A total of 451 patients, from 15 sites in South Africa, were entered in the study. The mean age of the patients was 60.7 years, 56.3% were female and 15.7% were current smokers. The BP was reduced by 26.4/17.6 mmHg (p < 0.001) in 220 patients with a documented initial BP. Co-morbidities were present in 322 (71.4%) patients and overall, 37.9% had more than one co-morbidity. Lifestyle modification was not uniformly applied, with only 46.1, 59.6 and 56.8% receiving advice about weight loss, exercise and diet, respectively. Less than a third (30.7%) of patients were on monotherapy, 42.8% were on two drugs (25.9% on fixed-drug combination and 16.9% on free combination) and 26.5% were on more than two agents. Most (86.9%) practitioners used either international or local guidelines to determine target BP. Overall, 61.2% of patients were at goal (BP < 140/90 mmHg). If a stricter target BP <or= 130/80 mmHg) is applied to patients with co-morbidities, as recommended by the guidelines, 60.6% of patients did not reach goal. Of the 175 patients not at target BP, there was no action plan in 22.9%, while 39.4% were advised to undertake lifestyle changes only.


CONCLUSIONS
Control rates were quite good in comparison with other surveys within and outside South Africa. However we were able to define several important deficiencies: there was evidence of physician inertia and also practitioners need to be more cognisant of local and international guidelines to optimise treatment.