Incident dysglycemia and progression to type 1 diabetes among participants in the diabetes prevention trial-type 1

Jay M. Sosenko, Jerry P. Palmer, Lisa Rafkin-Mervis, Jeffrey P. Krischer, David Cuthbertson, Jeffery Mahon, Carla J. Greenbaum, Catherine C. Cowie, Jay S. Skyler

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

OBJECTIVE - We studied the incidence of dysglycemia and its prediction of the development of type 1 diabetes in islet cell autoantibody (ICA)-positive individuals. In addition, we assessed whether dysglycemia was sustained. RESEARCH DESIGN AND METHODS - Participants (n = 515) in the Diabetes Prevention Trial-Type 1 (DPT-1) with normal glucose tolerance who underwent periodic oral glucose tolerance tests (OGTTs) were followed for incident dysglycemia (impaired fasting glucose, impaired glucose tolerance, and/or high glucose levels at intermediate time points of OGTTs). Incident dysglycemia at the 6-month visit was assessed for type 1 diabetes prediction. RESULTS - Of 515 participants with a normal baseline OGTT, 310 (60%) had at least one episode of dysglycemia over a maximum follow-up of 7 years. Dysglycemia at the 6-month visit was highly predictive of the development of type 1 diabetes, both in those aged <13 years (P <0.001) and those aged ≥13 years (P < 0.01). Those aged <13 years with dysglycemia at the 6-month visit had a high cumulative incidence (94% estimate by 5 years). Among those who developed type 1 diabetes after a dysglycemic OGTT and who had at least two OGTTs after the dysglycemic OGTT, 33 of 64 (52%) reverted back to a normal OGTT. However, 26 (79%) of the 33 then had another dysglycemic OGTT before diagnosis. CONCLUSIONS - ICA-positive individuals with normal glucose tolerance had a high incidence of dysglycemia. Incident dysglycemia in those who are ICA positive is strongly predictive of type 1 diabetes. Children with incident dysglycemia have an especially high risk. Fluctuations in and out of the dysglycemic state are not uncommon before the onset of type 1 diabetes.

Original languageEnglish (US)
Pages (from-to)1603-1607
Number of pages5
JournalDiabetes care
Volume32
Issue number9
DOIs
StatePublished - Sep 1 2009

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ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Advanced and Specialized Nursing

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