Objective: Data are limited on insulin resistance (IR) status in patients with type 1 diabetes (T1D). This study aimed to assess the IR status and the effect of onset age on IR in patients with T1D.
Methods: Through the Guangdong T1D registry study, we identified adult patients (aged≥18 years) with a diabetes duration≥1 year. Clinical data were collected. A previously established model based on euglycemic-hyperinsulinemic clamp were used to calculate the estimated glucose disposal rate (eGDR) via clinical parameters. Participants were categorized into groups based on age of onset: childhood-onset group (cT1D, age of onset<12 years); adolescent-onset group (pT1D, age of onset 12-17 years); and adult-onset group (aT1D, age at onset ≥18 years). Spearman correlation was used to analyze the correlation between IR and age of onset. ANOVA and Chi square test were used for comparisons of IR status and clinical parameters among the three groups.
Results: This analysis included 872 adults with T1D (58.3% female). The mean (SD) eGDR was 8.98 (3.34) mg/kg/min. There was a negative correlation between the level of IR status and the onset age (r=-0.093, p=0.003). The IR status assessed by eGDR decreased alongside an increase in age of onset (p=0.018). Compared with participants with older age of onset, patients in cT1D group had a higher level of A1c, lower proportion of participants with A1c less than 7%, higher daily insulin dose and higher frequency of hypoglycemic events (all p<0.05).
Conclusions: Age of onset was significantly and negatively correlated with IR status. Childhood-onset patients with T1D are more likely to benefit from treatment of IR condition.
D. Yang: None. C. Wang: None. X. Zheng: None. S. Luo: None. Q. Lin: None. J. Yan: None. J. Weng: None.