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Accuracy of Hemoglobin A1C to Predict Glycemia in HIV

This study has been completed.
Information provided by:
National Institutes of Health Clinical Center (CC) Identifier:
First received: February 9, 2007
Last updated: January 24, 2017
Last verified: August 25, 2009

This study will see if HbA1C, the usual blood test for monitoring blood sugar control in diabetic patients, is as accurate in diabetic patients who also have HIV and will evaluate if alternative methods for monitoring blood sugar are preferred for HIV infected patients.

HIV-infected patients 18 years of age and older with type 2 diabetes or high blood sugar may be eligible for this study. Participants have two clinic visits (1 to 4 weeks apart) at the NIH Clinical Center. At the first visit they provide a detailed medical, social and family history and have blood and urine samples collected. Previous blood sugar values are also recorded. At the second visit, scheduled for 1 to 4 weeks after the first visit, blood and urine samples are collected. Some of the urine and blood samples are stored for future research on diabetes, HIV or related conditions.


Study Type: Observational
Study Design: Time Perspective: Prospective
Official Title: Accuracy of Hemoglobin A1C to Predict Glycemia in HIV

Resource links provided by NLM:

Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 175
Study Start Date: February 7, 2007
Primary Completion Date: November 12, 2008 (Final data collection date for primary outcome measure)
Detailed Description:

Diabetes mellitus is increasingly recognized among patients living with human immunodeficiency virus (HIV) infection. At present, there are no unique guidelines for the management of diabetes in patients with HIV. Diabetes in this population is managed in accordance with national guidelines for the management of diabetes in any patient. However, there have been small studies suggesting that hemoglobin A1C (HbA1C) may not be indicative of true glycemic control in HIV positive patients. There are currently no published prospective studies examining the ability of HbA1C to reflect glycemic control in HIV positive patients with diabetes. Since the incidence of HIV positive patients with lipodystrophy, glucose intolerance, and diabetes is steadily increasing with the widespread use of highly active antiretroviral therapy (HAART), the question of how best to monitor hyperglycemia in these patients is an important one.

This study, a prospective cross-sectional study of 100 patients, seeks to collect preliminary data to determine if HbA1C is appropriately reflecting plasma glucose in HIV positive patients. Patients with HIV and diabetes or hyperglycemia will have a fasting and a random plasma glucose and HbA1C collected as in normal diabetes patient care. They will also have two validated alternate markers of glycemic control drawn, fructosamine and Glycomark [R], to determine how well these markers may reflect actual glycemia. Fructosamine represents a measure of protein glycosylation whereas Glycomark [R] is a monosaccharide in plasma competitively inhibited in the renal tubules by glucose that reflects day-to-day hyperglycemia. In addition, hemolysis will be assessed to investigate this as one potential mechanism for why HbA1C may be a less accurate representation of glycemia in these patients. The determination of the value of HbA1C as a marker of glycemia in HIV positive patients with diabetes will assist with the monitoring and the management of this unique population with diabetes. The measurement of other glycemic markers may provide evidence towards potential superior markers of glycemia in these patients, and the study will provide insight into the possible mechanism of the HbA1C discrepancy.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Documented + HIV ELISA.

Diabetes mellitus (DM) will be defined as:

Documented diagnosis of type 2 diabetes mellitus or FPG greater than or equal to 126 mg/dl on two occasions or casual blood glucose greater than or equal to 200 mg/dL and symptoms of diabetes.

Impaired Fasting Glucose (IFG) defined as:

FPG greater than or equal to 100 mg/dl and less than 126 mg/dl on one or more occasions within past year.

Age 18+, male or female.


Type 1 Diabetes.

Known current pregnancy or pregnancy within 6 mo.

Documented hemoglobinopathy.

Changes in antiretroviral therapy within 3 months.

History of anemia (Hb less than 9g/dL in past 6 months).

Active opportunistic Infection or opportunistic Infection within 3 mo.

Creatine greater than 1.8 mg/dL or known end stage renal disease (ESRD).

Changes in diabetes therapies within 3 mo (excluding dose adjustments).

Subject is deemed unable to comply with requirements of study participation.

Use of oral corticosteroid within the past 3 mo (stable dose inhaled steroids will be allowed).

Blood transfusion within 3 months.

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00433628

United States, District of Columbia
Washington Hospital Center
Washington, District of Columbia, United States, 20010
United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institute of Allergy and Infectious Diseases (NIAID)
  More Information Identifier: NCT00433628     History of Changes
Other Study ID Numbers: 070094
Study First Received: February 9, 2007
Last Updated: January 24, 2017

Keywords provided by National Institutes of Health Clinical Center (CC):
Hemoglobin A1C
Diabetes Type 2

Additional relevant MeSH terms:
Glucose Metabolism Disorders
Metabolic Diseases processed this record on April 27, 2017