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Using Eye Movements to Evaluate the Cognitive Processes Involved in Text Comprehension
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Counterpoint--the end point: less is more.

G Alexander Fleming1

  • 1Kinexum LLC, Harper's Ferry, West Virginia 25425, USA. zanfleming@kinexum.com

Journal of Diabetes Science and Technology
|October 27, 2011
PubMed
Summary
This summary is machine-generated.

A composite endpoint combining hemoglobin A1c (HbA1c) and hypoglycemia is not superior to HbA1c alone for evaluating diabetes drugs. This approach offers few advantages and may obscure treatment benefits.

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Area of Science:

  • Metabolic disorders
  • Pharmacological therapies
  • Clinical trial design

Background:

  • Evaluating therapies for metabolic disorders requires continuous scientific and technological advancement.
  • Composite endpoints are often used in drug approvals when simpler measures are insufficient, such as major adverse cardiac events (MACE) in cardiovascular trials.
  • These composite endpoints can present challenges including validation difficulties and reduced sensitivity to clinically significant effects.

Purpose of the Study:

  • To evaluate the utility of a composite primary efficacy endpoint combining hemoglobin A1c (HbA1c) and hypoglycemia rates for glucose-lowering therapies.
  • To assess the advantages and disadvantages of such composite endpoints compared to using HbA1c alone.
  • To determine the most effective approach for developing and evaluating diabetes medications, particularly insulin products.

Main Methods:

  • Analysis of the scientific and regulatory landscape for metabolic disorder therapies.
  • Review of the established use and limitations of composite endpoints in clinical trials, using MACE as a precedent.
  • Conceptual evaluation of a proposed composite endpoint for diabetes drugs (glycemic control and hypoglycemia).

Main Results:

  • The proposed composite endpoint of HbA1c and hypoglycemia offers minimal advantage, and potentially disadvantages, over HbA1c alone for assessing glucose-lowering therapies.
  • Composite endpoints, including the one proposed for diabetes, share inherent drawbacks such as reliance on assumptions and oversimplification of evidence.
  • Even for insulin, where hypoglycemia is a key safety concern, a treat-to-target design with glycemic control as the primary outcome and hypoglycemia as a safety measure is more feasible.

Conclusions:

  • A composite endpoint combining glycemic control and hypoglycemia presents significant drawbacks for evaluating diabetes therapies.
  • Hemoglobin A1c (HbA1c) remains a more effective primary efficacy outcome for glucose-lowering drugs.
  • Future development and evaluation of diabetes treatments, including insulin, should prioritize glycemic control as the primary efficacy endpoint with hypoglycemia as a key safety measure.