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The VA Diabetes Trial Follow-up Study (VADT-FS)

This study is ongoing, but not recruiting participants.
Information provided by (Responsible Party):
Department of Veterans Affairs Identifier:
First received: September 18, 2008
Last updated: September 25, 2014
Last verified: September 2014

CSP #465, "Glycemic Control and Complications in Diabetes Mellitus Type 2," was a randomized unblinded clinical trial comparing tight glycemic control to standard glycemic control. Tight glycemic control consisted of giving patients appropriate diabetic medications to lower the patient's HbA1c to around 7%, whereas standard control attempted to lower the patient's HbA1c to between 8% and 9%. The study was conducted at 20 VA medical centers. One thousand seven hundred and ninety two patients were randomized over the 2 year accrual period and then followed for an additional 5 years. Follow-up averaged between 5 and 7 years depending upon when the patient was enrolled in the study. Patients were seen on average every three months in the VA Outpatient Clinics. High blood pressure and elevated cholesterol were aggressively treated in patients in both treatment arms. Education regarding diet, exercise, smoking cessation and management of very high and very low glucose was also provided. Data were collected throughout the study on the patients' physical status, adverse and serious adverse events, concomitant medications, and study end points including mortality, heart attack, stroke and surgery to fix the arteries in the heart, legs or neck. The study consisted of broad use of all anti-diabetic treatments commercially available between 2000 and 2008 including oral medications and insulin. Study required medications and all study clinic visits were provided free of the usual VA co-pay. Active clinical follow-up of the sample ended on May 31, 2008. With the end of the clinical trial the patients were transitioned back to usual patient care services, treatment regimens were adjusted where appropriate and future treatment will be dictated by the patient's health and his/her health care provider.

It is important to clarify that with the completion of the active clinical trial and transitioning of patients to this observational trial, all responsibility for the care, treatment and oversight of the study patients will become the responsibility of the patients' Primary Care Physician. The Long Term Follow-up will not collect adverse or serious adverse events, or actively treat or have any "hands-on" care responsibility for the study participants.

The proposed Long Term Follow-up Study will consist of centralized computer database searches and annual survey questionnaires related to quality of life and self-reported events pertinent to the CSP #465 study.

Glycemic Control

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: CSP #465FS - VA Diabetes Trial Long Term Follow-up Study

Further study details as provided by Department of Veterans Affairs:

Primary Outcome Measures:
  • To determine the long term effect of intensive glycemic control in type 2 diabetes on major cardiovascular complication. [ Time Frame: Nine years. ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • 2.To determine the long term effects of intensive glycemic control in type 2 diabetes on four secondary outcomes: a) cardiovascular mortality, b) major microvascular complications, c) health-related quality of life, and d) total mortality. [ Time Frame: Nine years. ] [ Designated as safety issue: No ]

Estimated Enrollment: 1350
Study Start Date: February 2008
Estimated Study Completion Date: May 2017
Estimated Primary Completion Date: May 2017 (Final data collection date for primary outcome measure)
Group 1
All of the patients that participated in the VADT Study.

Detailed Description:

Diabetes mellitus is a major health problem in the U.S., especially in the VA population. The majority of diabetics are Type 2, and they are at risk for microvascular (e.g. eye, kidney) and macrovascular (e.g.

cardiovascular) complications. It is probable that many of the macrovascular and microvascular complications potentially prevented by the 5-7 years of good Glycemic control achieved in the VADT (median follow-up 6.25 years) will occur years after completion of the VADT experimental protocol. This follow-up study will provide the opportunity to see if this holds true up to 9 years following the end of 465.

The results will help the VA in evaluating most appropriate treatments and costs of such treatment.

This is a longitudinal observational follow-up study of CSP #465, "Glycemic Control and Complications in Diabetes Mellitus Type 2",the VA Diabetes Trial (VADT). The objectives are: 1) to determine the long term effects of intensive glycemic control in type 2 diabetes on major cardiovascular complications (primary outcome), and 2) to determine the long term effects of intensive glycemic control in type 2 diabetes on four secondary outcomes: a) cardiovascular mortality, b) major microvascular complications, c) health-related quality of life, and d) total mortality. All patients active at the end of VADT will be approached for participation in VADT-FS. The only exclusion reason will be failure to receive consent for participation. Consented VADT-FS patients will be followed until the end of the study unless they withdraw their consent. Patients will be sent a short, standardized self-administered survey annually. Information collected will include: 1) self-reported health status; 2) occurrence of study endpoints; and 3) VA or non-VA outpatient visits, hospitalizations and procedures. A variety of data sources will be searched to verify endpoints. These sources include: 1) VA and non-VA medical records; 2) data from the Centers for Medicare and Medicaid Services (CMS); and 3) VA and US death records. Patients who do not respond to 3 mailed surveys will be contacted by phone.

If still unsuccessful, their designated surrogate will be contacted. Certain endpoints will be adjudicated by the same committee that was utilized by VADT. Endpoints that will be adjudicated will include: 1) cause of death; 2) reason for amputation; and 3) cardiac-related non-VA hospitalizations. Endpoints of interest in this study include: 1) mortality; 2) acute myocardial infarction requiring hospitalization; 3) stroke; 4) new onset congestive heart failure; 5) coronary revascularization; 6) amputation; 7) peripheral revascularization; 8) renal insufficiency; 9) severe visual impairment; and 10) self-reported health status (diabetes-related quality of life).


Ages Eligible for Study:   40 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population

To be eligible for the VADT, subjects had to be over 40 years old, have type 2 diabetes and be non-responsive (A1c > 7.5%) to a maximum daily dose of one or more oral agents or on insulin. And to participate in the VADT-FS the participant had to be active in the VADT study.


Inclusion Criteria:

  • All patients active at the end of VADT will be approached for participation.

Exclusion Criteria:

  • The only exclusion criterion will be failure to achieve consent for continued participation.
  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: NCT00756613

United States, Arizona
Carl T. Hayden VA Medical Center
Phoenix, Arizona, United States, 85012
United States, Florida
Miami VA Healthcare System, Miami, FL
Miami, Florida, United States, 33125
Sponsors and Collaborators
Study Chair: Peter Reaven, MD Carl T. Hayden VA Medical Center
Study Chair: Carlos Abraira, MD Miami VA Healthcare System, Miami, FL