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- W4256378315 abstract "<b>Objective:</b> To assess the progression of type 1 diabetes using time to peak glucose or C-peptide during oral glucose tolerance tests (OGTTs) in autoantibody positive (Ab+) relatives of people with type 1 diabetes. <p><b>Methods:</b> We examined 2-hour OGTTs of participants in the Diabetes Prevention Trial Type 1 (DPT-1) and TrialNet Pathway to Prevention (PTP) studies. We included 706 DPT-1 participants (Mean±SD age: 13.84±9.53 years; BMI-Z-Score: 0.33±1.07; 56.1% male) and 3,720 PTP participants (age: 16.01±12.33 Years, BMI-Z-Score 0.66±1.3; 49.7% male). Log-rank testing and Cox regression analyses with adjustments (age, sex, race, BMI Z-Score, HOMA-IR and peak Glucose/C-peptide levels, respectively) were performed. </p> <p><b>Results:</b> In each of DPT-1 and PTP, higher 5-year diabetes progression risk was seen in those with time to peak glucose >30 min and time to peak C-peptide >60 min (p<0.001 for all groups), before and after adjustments. In models examining strength of association with diabetes development, associations were greater for time to peak C-peptide versus peak C-peptide value (DPT-1: X<sup>2 </sup>= 25.76 vs. X<sup>2</sup> = 8.62 and PTP: X<sup>2 </sup>= 149.19 vs. X<sup>2</sup> = 79.98; all p<0.001). Changes in the percentage of individuals with delayed glucose and/or C-peptide peaks were noted over time.</p> <p><b>Conclusions: </b>In two independent at risk populations, we show that those with delayed OGTT peak times for glucose or C-peptide are at higher risk of diabetes development within 5 years, independent of peak levels. Moreover, time to peak C-peptide appears more predictive than the peak level, suggesting its potential use as a specific biomarker for diabetes progression. </p>" @default.
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- W4256378315 date "2021-08-06" @default.
- W4256378315 modified "2023-09-29" @default.
- W4256378315 title "Time to Peak Glucose and Peak C-Peptide During the Progression to Type 1 Diabetes in the Diabetes Prevention Trial and TrialNet Cohorts" @default.
- W4256378315 doi "https://doi.org/10.2337/figshare.14974563.v2" @default.
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