Oral Contraceptives in the Metabolic Syndrome
试验速览
- 阶段
- 4 期
- 状态
- 已完成
- 入组人数
- 46
- 试验地点
- 1
- 主要终点
- Changes in Insulin Sensitivity Associated With Oral Contraceptive (OC) Use Compared Among (1) Obese Women and (2) Lean Women
研究概览
简要总结
Oral contraceptives (OCs) are the most widely used method of reversible birth control. However, the long-term cardiovascular safety of the widely used low-dose OCs (ethinyl-estradiol < 50 mcg) is still debated. Although cardiovascular events are rare in young women whether they use OCs or not, the risks of myocardial infarction and ischemic stroke are increased among users of OCs who have conventional cardiovascular risk factors such as use of tobacco, diabetes or hypercholesterolemia. However, the risk of cardiovascular events in OC users with emerging cardiovascular risk factors (such as obesity and the metabolic syndrome) have not been investigated. Recently, the metabolic syndrome has been linked with the risk of cardiovascular disease. The syndrome is a clustering of risk factors in a single individual, and its underlying cause may be insulin resistance. Whether the metabolic syndrome predicts a higher cardiovascular risk in OC users has not been studied. This is a critical problem because the metabolic syndrome is prevalent in 24% of adults. Until the cardiovascular risks in users of OC are clearly defined, the appropriate use of OC with the least harm would not be possible.
The investigator's long-term goal is to understand the best way to prevent and treat cardiovascular disease in women. The objective of this particular project is to obtain pilot data on the extent to which the metabolic syndrome and obesity affects glucose metabolism and cardiovascular risks in women taking OCs. The researchers hypothesize that women with metabolic syndrome and obese women will have worsened glucose metabolism and elevated cardiovascular risks associated with OC use, when compared to normal weight women without the metabolic syndrome. Results of this study will clarify the risk factors for cardiovascular events in women taking OCs, and will serve as pilot data for a National Institutes of Health (NIH) proposal. Once the cardiovascular risk factors of OC users are understood, clinicians can make better informed decisions about contraceptive choices for their patients.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 40 Years（Adult）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •Acceptable health based on interview, medical history, physical examination, and laboratory tests (comprehensive metabolic panel - SMA20, and complete blood count - CBC);
- •Have not taken oral contraceptives (OCs) in the past 3 months;
- •Ability to comply with the requirements of the study;
- •Ability and willingness to provide signed, witnessed informed consent. In addition, women with the metabolic syndrome must meet the National Cholesterol Education Program (NCEP) defined criteria of the metabolic syndrome, that is, having at least 3 of the 5 factors:
- •increased waist circumference > 35 inches,
- •hypertriglyceridemia ≥ 150 mg/dL,
- •low high-density lipoprotein (HDL) cholesterol < 50 mg/dL in women,
- •hypertension (≥ 130/≥ 85 mmHg),
- •fasting glucose ≥ 100 mg/dL.
- •Obese women with or without the metabolic syndrome should have a Body Mass Index (BMI) > 30 kg/m2 and lean women should have a Body Mass Index BMI < 25 kg/m2.
排除标准
- •Diabetes mellitus by fasting glucose or a 2-hour oral glucose tolerance test (OGTT);
- •Clinically significant pulmonary, cardiac (including but not limited to ischemic heart disease, stable/unstable angina, and congestive heart failure), renal, hepatic, cholestatic, neurologic, psychiatric, infectious, and malignant disease (other than melanoma skin cancer);
- •History of thromboembolism, myocardial infarction, cerebrovascular accident, vascular disease, known coagulopathy, prolonged immobilization, or recent major surgery (within past 6 months);
- •Systolic blood pressure greater than 160 mmHg or diastolic blood pressure greater than 100 mmHg (mild hypertension is not an exclusion criterion);
- •History of breast cancer, migraine headaches, or age ≥ 35 years and smoker of ≥ 20 cigarettes/day;
- •Use of metformin, thiazolidinediones, anti-hyperlipidemic drugs, anti-hypertensive drugs, glucocorticoids, or anti-androgens (spironolactone, flutamide, etc.) within 3 months;
- •Documented or suspected illicit drug abuse or alcoholism within one year;
- •Ingestion of any investigational drugs within 3 months prior to the study onset; and
- •Pregnancy or lactation (≤ 6 weeks postpartum);
- •Hematocrit < 33g/dL. These exclusion criteria are based on study requirements and also go beyond guidelines for OC use published by the World Health Organization.
研究组 & 干预措施
Obese women with metabolic syndrome
干预措施: Ortho Tri Cyclen (Drug)
Obese women without metabolic syndrome
干预措施: Ortho Tri Cyclen (Drug)
lean women without metabolic syndrome
干预措施: Ortho Tri Cyclen (Drug)
结局指标
主要结局
Changes in Insulin Sensitivity Associated With Oral Contraceptive (OC) Use Compared Among (1) Obese Women and (2) Lean Women
时间窗: Baseline and 6 months
Insulin sensitivity was assessed by frequent sampling intravenous glucose tolerance test (FSIVGTT).
次要结局
- Changes in Lipid Profile Compared Associated With OC Use Among (1) Obese Women and (2) Lean Women(Baseline and 6 months)
- Changes in Waist-to-Hip Ratio Associated With OC Use Compared Among (1) Obese Women and (2) Lean Women(Baseline and 6 months)
- Inflammatory Marker Changes (MCP-1) Associated With OC Use Compared Among (1) Obese Women and (2) Lean Women(Baseline and 6 months)
- Inflammatory Marker Changes, High Sensitive C-reactive Protein (Hs-CRP) and Adiponectin, Associated With OC Use Compared Among (1) Obese Women and (2) Lean Women(Baseline and 6 months)
- Changes in Estrogen Metabolites (Plasma) Associated With OC Use Compared Among (1) Obese Women and (2) Lean Women(Baseline and 6 months)
- Changes in Blood Pressure Associated With OC Use Compared Among (1) Obese Women and (2) Lean Women(Baseline and 6 months)
- Changes in Body Mass Index (BMI) Associated With OC Use Compared Among (1) Obese Women and (2) Lean Women(Baseline and 6 months)
- Changes in Waist Circumference Associated With OC Use Compared Among (1) Obese Women and (2) Lean Women(Baseline and 6 months)
- Inflammatory Marker Changes, Soluble Vascular Cell Adhesion Molecule (sVCAM) and Soluble Intercellular Adhesion Molecule (sICAM), Associated With OC Use Compared Among (1) Obese Women and (2) Lean Women(Baseline and 6 months)