the year prior to the release of the JNC 7 definition of appropriate BP control.The treatment goal for individuals with HTN without other compelling conditions (i.e., diabetes mellitus [DM], heart failure, postmyocardial infarction (MI), chronic kidney disease, recurrent stroke prevention, or high coronary disease risk) is BP <140/90 mm Hg.1 JNC 7 guidelines set a goal of <140/90 mm Hg for the prevention and management of uncomplicated HTN to decrease morbidity and mortality by the least intrusive means possible.1 Although cardiovascular (CV) risk increases linearly with increases in systolic BP (SBP) >115 mm Hg, a more rapid increase in risk is noted when BP exceeds 140/90 mm Hg.2 In patients with HTN and DM or renal disease, the BP goal is <130/80 mm Hg. The American Diabetes Association (ADA) also recommends a BP goal <130/80 mm Hg for adults with DM. 3 Epidemiological analyses indicate that the attainment of this BP goal is associated with a decrease in CV rates and mortality in persons with DM without compromising safety or increasing the cost of care. can reduce complications such as nephropathy, cerebrovascular disease, and cardiovascular disease. As part of a quality improvement project with a managed care organization (MCO), we evaluated blood pressure (BP) control relative to the type of drug therapy for patients with type 1 or type 2 DM who were identified from pharmacy claims for antihyperglycemic drug therapy.METHODS: Pharmacy claims for antihyperglycemic drugs, including insulin, were used to identify a random sample of commercial members in an MCO comprising 30 health plans across the United States. Retrospective medical record review was conducted in October 2003 to collect data from 4,814 patient charts. BP goal attainment according to The Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure (JNC 7) guidelines was determined for each patient from the most recent BP reading documented in the medical chart.
RESULTS:The distribution by type of DM was 21.0% (n = 1,011) for type 1, 75.7% (n = 3,644) for type 2, and 3.3% (n = 159) for cases not documented in the medical chart. Excluding 590 charts (12.3%) without BP values, there were 1,328 of 4,224 DM patients (31.4%) at JNC 7 BP goal (<130/80 mm Hg). Of the 1,328 patients at JNC 7 BP goal, 577 (43.4%) were at JNC 7 BP goal with no drug therapy. Excluding the 577 patients who did not require drug therapy to reach JNC 7 goal, 751 (20.6%) of the remaining 3,647 patients who required antihypertensive drug therapy were at JNC 7 BP goal, and 788 (21.6%) received no antihypertensive drug therapy. For the population of 4,224 DM patients with a BP value recorded in the chart, application of the lower BP goals in the JNC 7 guidelines reduced the proportion with controlled BP to 31.4% (1,328/4,224) from 42.6% (1,799/4,224) according to the former JNC 6 guidelines (P <0.01). The proportion of DM patients with HTN was 59.6% (n = 2,870), and 28.4% (n = 814) of these patients were not taking ei...