PreDx finger stick comparable to venous blood assay in detecting diabetes risk.

Clinicians may be able to accurately detect a patient’s likelihood of developing type 2 diabetes with the use of a finger stick capillary blood collection test, according to data presented here at the AACE Annual Scientific and Clinical Congress.

“We’ve developed what we call the PreDx score (Tethys Bioscience). It’s a multimarker algorithm-based diagnostic. It combines the results from seven different blood-based biomarkers along with the patient’s age and gender to produce a single score between 1 and 10,” researcher Theodore Tarasow, PhD, senior vice president of research and development at Tethys Biosciences, said during a late-breaking abstract presentation here. “We’ve done clinical studies to show that that score is directly tied to a person’s 5-year risk for developing diabetes.”

Tarasow said the accuracy of the finger stick blood assays yielded promising results that were comparable to venous blood assays. Data presented indicate that the coefficient of variation ranged from 2.4% for HbA1c to 11.3% for adiponectin. Upon calibration, results showed impressive agreement between PreDx values and matched samples. Overall slope was 0.997 (95% CI, 0.916-1.078) and intercept was –0.048 (95% CI, –0.206 to 0.110) by Deming regression, according to data.

Further, data from the Inter99 study indicated no significant differences in area under the curve (AUC), positive predictive value or sensitivity when comparing simulated finger stick scores with venous scores. Both PreDx venous and PreDx finger stick were also superior to fasting glucose by AUC and other measures in predicting development of diabetes.

“What we really need is the ability to find those at the highest risk and apply additional resources to try and prevent or delay that conversion to diabetes,” Tarasow said.

Tarasow said the PreDx is no more expensive than current tests available for its diagnostic purpose.

“From a clinical perspective what this is really going to allow us to do is have greater access to patients where there is not access to onsite phlebotomy,” Tarasow said. – by Samantha Costa



  • Using a litmus paper — a simple technique to do this test — allows greater adoption of this predictive tool for how to aggressively treat diabetes or not. If you have a patient at high risk for diabetes in the prediabetes population, you then may use pharmaceutical agents (i.e., metformin), but if you’re treating a low-risk patient, you probably don’t need to do so. Or, you may put them into a supervised exercise program or some type of diet or bariatric surgery. Your intervention will be much stronger.
  • Bruce W. Bode, MD
  • o    Atlanta Diabetes Associates
    Endocrine Specialty Group

Source: Endocrine Today



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