The study evaluates the rate beta-cell function decline in newly diagnosed type 2 diabetic patients on two different treatment regimens: insulin and metformin versus glyburide, metformin and pioglitazone.
This is a 72 months long randomized clinical trial longitudinally evaluating beta-cell function, as well as glycemic control and inflammatory markers in newly diagnosed type 2 diabetic patients on two different treatment regimens: insulin and metformin versus glyburide, metformin and pioglitazone.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
58
University of Texas Southwestern
Dallas, Texas, United States
Beta-cell Function - C-peptide AUC (Area Under the Curve)
C-peptide AUC during a 3-hours mixed meal challenge testing
Time frame: 72 months
Insulin Sensitivity as Measure be Matsuda Index
C-peptide-based Matsuda index using following formula: Matsuda index = 500,00 / root square \[(fasting c-peptide x fasting glucose x 333) x (average c-peptide 0-120 mins x average glucose 0-120 mins x 333). Higher the Matsuda index, better the insulin sensitivity.
Time frame: 72 months
Bet-cell Function Measured by Disposition Index
Disposition index was measured by multiplying the insulin secretion (C-peptide AUC/C-peptide AUC glucose) by the Matsuda index. Disposition index reflects the beta-cell function adjusted for total body insulin sensitivity
Time frame: 72 months
Weight
Body Weight
Time frame: 72 months
Inflammatory Markers - hsCRP
Inflammatory markers - hsCRP (C reactive protein)
Time frame: 72 months
Inflammatory Markers -Fibrinogen
Inflammatory markers - Fibrinogen
Time frame: 72 months
Inflammatory Markers - PAI-1
Inflammatory markers - PAI-1 (Plasminogen activator inhibitor type 1)
Time frame: 72 months
Quality of Life Survey (QoL) - Current Health Perception
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Pioglitazone 45mg
Glyburide per protocol titration
Current health perception was measured at randomization and 72 months later using the modified Diabetes Quality of Life Clinical Trial Questionnaire. This questionnaire addresses several areas with respect to diabetes QoL. Answers are in the form of a Likert scale score of 1-5, where 1 = much better than 3 months ago; 2 - Somewhat better now than 3 months ago; 3 - About the same; 4 - Somewhat worse now than 3 months ago; 5 Much worse now than 3 months ago.
Time frame: 72 months
Quality of Life Survey (QoL) - Treatment Satisfaction
Treatment satisfaction was measured at randomization and 72 months later using the modified Diabetes Quality of Life Clinical Trial Questionnaire. This questionnaire addresses several areas with respect to diabetes QoL. Answers are in the form of a Likert scale score of 1-5, where 1 - very satisfied; 2 - moderately satisfied; 3 - neither satisfied nor dissatisfied; 4 - moderately dissatisfied; 5 - very dissatisfied.
Time frame: 72 months
Quality of Life Survey (QoL) - Treatment Impact
Treatment impact was measured at randomization and 72 months later using the modified Diabetes Quality of Life Clinical Trial Questionnaire. This questionnaire addresses several areas with respect to diabetes QoL. Answers are in the form of a Likert scale score of 1-5, where 1 - very satisfied; 2 - moderately satisfied; 3 - neither satisfied nor dissatisfied; 4 - moderately dissatisfied; 5 - very dissatisfied.
Time frame: 72 months
Quality of Life Survey (QoL) - Social or Vocational Worry
Social or vocational worry was measured at randomization and 72 months later using the modified Diabetes Quality of Life Clinical Trial Questionnaire. This questionnaire addresses several areas with respect to diabetes QoL. Answers are in the form of a Likert scale score of 0-5, where 0 - does not apply; 1 - never; 2 - seldom; 3 - sometimes; 4 - often; 5 - all of the time.
Time frame: 72 months
Quality of Life Survey (QoL) - Hypoglycemia Fear
Hypoglycemia fear was measured at randomization and 72 months later using the modified Diabetes Quality of Life Clinical Trial Questionnaire. This questionnaire addresses several areas with respect to diabetes QoL. Answers are in the form of a Likert scale score of 1-5, where 1 - never worry; 2 - rarely water; 3 - sometimes worry; 4 - often worry; 5 - very often worry
Time frame: 72 months
Quality of Life Survey (QoL) - Glycemia Control Perception
Glycemia control perception was measured at randomization and 72 months later using the modified Diabetes Quality of Life Clinical Trial Questionnaire. This questionnaire addresses several areas with respect to diabetes QoL. Answers are in the form of a scale score of 1-7, where 1 - extremely controlled and 7 - not at all controlled.
Time frame: 72 months
Quality of Life Survey (QoL) - Lifestyle Flexibility
Lifestyle flexibility was measured at randomization and 72 months later using the modified Diabetes Quality of Life Clinical Trial Questionnaire. This questionnaire addresses several areas with respect to diabetes QoL. Answers are in the form of a Likert scale score of 1 to 5, where 1 - a great deal of choice; 2 - a lot of choice; 3 - some choice; 4 - a little choice; 5 - no choice.
Time frame: 72 months
Quality of Life Survey (QoL) - Social Stigma
Social stigma was measured at randomization and 72 months later using the modified Diabetes Quality of Life Clinical Trial Questionnaire. This questionnaire addresses several areas with respect to diabetes QoL. Answers are in the form of a Likert scale score of 1 to 5, where 1- strongly agree; 2 - somewhat agree; 3 - neither agree nor disagree; 4 - somewhat disagree; 5 - strongly disagree.
Time frame: 72 months
Quality of Life Survey (QoL) - Satisfaction With Insulin Treatment
Satisfaction with insulin treatment was measured at randomization and 72 months later using the modified Diabetes Quality of Life Clinical Trial Questionnaire. This questionnaire addresses several areas with respect to diabetes QoL. Answers are in the form of a scale score of 1 to 7, where 1 extremely satisfied to 7 - not at all satisfied.
Time frame: 72 months
Quality of Life Survey (QoL) - Willingness to Continue Insulin Treatment
Willingness to continue insulin treatment was measured at randomization and 72 months later using the modified Diabetes Quality of Life Clinical Trial Questionnaire. This questionnaire addresses several areas with respect to diabetes QoL. Answers are in the form of a scale score of 1 to 7, where 1 extremely willing to 7 - not at all willing.
Time frame: 72 months