Publications by authors named "Roland S Chen"

Objective: This 24-week trial assessed the efficacy and safety of saxagliptin as add-on therapy in patients with type 2 diabetes with inadequate glycemic control with metformin alone.

Research Design And Methods: This was a randomized, double-blind, placebo-controlled study of saxagliptin (2.5, 5, or 10 mg once daily) or placebo plus a stable dose of metformin (1,500-2,500 mg) in 743 patients (A1C > or =7.

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Objective: Numerous studies support the benefit of beta-blockers and angiotensin-converting enzyme inhibition (ACE-I) in the management of heart failure. However, the real-world cost of heart failure in patients who take these medications is not well documented; furthermore, it is unclear if heart failure costs remain significant when current, appropriately aggressive care is delivered.

Design: This study describes 1-year medical costs in patients hospitalised for heart failure who received these therapies, alone or in combination.

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We sought to determine, in United States (US) patients with the metabolic syndrome (MS), diabetes mellitus (DM), or preexisting cardiovascular disease, whether higher levels of C-reactive protein (CRP) would identify those with an increased likelihood of peripheral arterial disease (PAD). In a cross-sectional evaluation of the National Health and Nutrition Examination Survey (NHANES), 1999 to 2000, of 1,600 adults (representing a US population of 62.9 million) aged > or =40 years who had valid ankle-brachial index measurements available, subjects were categorized as having MS (without DM), DM, preexisting cardiovascular disease, or none of these conditions.

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Objective: We assessed the prevalence, treatment, and control of dyslipidemia among United States (U.S.) adults with diabetes.

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Objective: Improved recognition of the importance of systolic blood pressure (SBP) has been identified as one of the major public health and medical challenges in the prevention and treatment of hypertension (HTN). SBP is a strong independent risk factor for cardiovascular disease but no information is available on whether patients understand the importance of their SBP level. The purpose of this study was to assess HTN knowledge, awareness, and attitudes, especially related to SBP in a hypertensive population.

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Background: Treatment-to-goal (TTG) analyses are frequently used to predict guideline-directed population control rates for drug therapies based on mean efficacy data. Nevertheless, estimates are commonly inaccurate because variability in efficacy is not considered. A new methodology was developed to improve TTG forecasting.

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Background: Although some studies have shown that hospital admissions for heart failure doubled between 1973 and 1995, other data suggest that the heart failure hospitalization epidemic has stabilized in the United States. We sought to describe trends in heart failure hospitalizations over the past decade using data from the National Hospital Discharge Survey (NHDS).

Methods: The NHDS provides annual estimates of hospitalization discharges from a sample of hospitals in the United States.

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Background: The combination of cardiovascular risk factors known as the metabolic syndrome is receiving increased attention from physicians, but data on the syndrome's association with morbidity are limited.

Methods And Results: Applying National Cholesterol Education Program Adult Treatment Panel III (NCEP-ATP III) criteria, we evaluated 10 357 NHANES III subjects for the 5 component conditions of the metabolic syndrome: insulin resistance, abdominal obesity based on waist circumference, hypertriglyceridemia, low HDL cholesterol (HDL-C), and hypertension, as well as the full syndrome, defined as at least 3 of the 5 conditions. Logistic regression was used to estimate the cross-sectional association of the syndrome and each of its 5 component conditions separately with history of myocardial infarction (MI), stroke, and either MI or stroke (MI/stroke).

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The life expectancy benefits of antihypertensive treatment, based on both systolic and diastolic blood pressure reduction, was estimated with a cardiovascular disease event Markov model with prospective data from 57 573 men and women. Seven patient states were defined, including (1) no cardiovascular disease, (2) stroke, (3) myocardial infarction, (4) revascularization, (5) history of cardiovascular disease, (6) noncardiovascular disease death, and (7) cardiovascular death. Risk functions were developed from gender-specific multivariate Cox proportional hazards models for primary events and age-, smoking-, and diabetes-adjusted models for secondary events.

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Background: End-stage renal disease (ESRD)-related health care costs are substantial. Improving clinical outcomes in patients at risk of progression to ESRD could lead to considerable health care savings.

Objective: We estimated the cost-effectiveness of irbesartan compared with placebo or amlodipine in the treatment of patients with type 2 diabetes mellitus, hypertension, and overt nephropathy.

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Patient knowledge and awareness of hypertension are important factors in achieving blood pressure control. To examine hypertensive patients' knowledge of their condition, the authors randomly surveyed 2500 hypertension patients from a large health maintenance organization; questionnaires were supplemented with clinic blood pressure measurements. Approximately 72% of the subjects completed surveys.

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Synopsis of recent research by authors named "Roland S Chen"

  • - Roland S Chen's research primarily focuses on the management and economic implications of chronic diseases, specifically type 2 diabetes, heart failure, and hypertension, exploring both pharmaceutical interventions and their effectiveness in real-world scenarios.
  • - His studies often investigate the safety and efficacy of various treatments, such as saxagliptin for type 2 diabetes and irbesartan for hypertensive patients with nephropathy, while also assessing associated health care costs and outcomes.
  • - Chen's work highlights the connections between biochemical markers (like C-reactive protein) and the likelihood of cardiovascular events, providing insights into the epidemiology of conditions like peripheral arterial disease and dyslipidemia in populations with metabolic syndrome.