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Prognostic markers in treated hypertensive diabetic patients. 28-month follow-up.

INTRODUCTION
Diabetes mellitus has a prevalence of about 6 to 10% in western populations, with a rising tendency due to inappropriate increases in calorie intake and decreased physical activity. In diabetic patients hypertension (HT) has a prevalence of over 60% and cerebro- and cardiovascular disease is responsible for two-thirds of the mortality in these patients.


PATIENTS AND METHODS
We studied prospectively and consecutively 97 patients (age 63 +/- 8; 39-89) with treated type 2 diabetes and HT. The objective was to identify cardio- and cerebrovascular risk markers. The majority of the patients were evaluated by clinical and laboratory examination, 24h ambulatory blood pressure monitoring (ABPM), HbA1c, total cholesterol, HDL-C and triglycerides, microalbuminuria, echocardiogram (left ventricular mass index) and carotid-femoral pulse wave velocity. Later, the patients were re-evaluated using the same diagnostic methodology after a mean follow-up of 28 months.


RESULTS
The population was at high risk for cardio- and cerebrovascular disease (60% dyslipidemic, 39% with previous cerebro- or cardiovascular accidents, 73% nondipper, 69% with decreased vascular distensibility [<12 m/sec] and 35% with microalbuminuria) despite treatment. Diabetes was controlled in only 55% of cases and blood pressure (BP) in 10%, although by ABPM it was controlled in 40% of cases. Simultaneous control of diabetes and HT was present in only one third of the patients. At the end of follow-up these values had not changed significantly, which can only be considered positive in respect of reduction in microalbuminuria (due to ACEIs and AIIRAs). Thirty cardio- and cerebrovascular events occurred (5 deaths), related to inadequate control of diabetes at initial evaluation (p=0.012), night-time systolic BP (SBP) and nondipper status (p=0.02) and vascular distensibility at the end of the study (p=0.03). On multiple linear regression (stepwise) analysis the only variable which was significantly associated with cardio- and cerebrovascular mortality and morbidity was night-time SBP.


CONCLUSIONS
Overall analysis of the data confirmed the elevated risk of these patients and the importance of more frequent and aggressive control. The study also confirms the importance of evaluation by ABPM in these patients, which may lead to more efficacious, tailor-made treatment.