Development of a Chinese-Specific Clinical Model to Predict Maturity-Onset Diabetes of the Young

Aims

Accurate identification of individuals with maturity-onset diabetes of the young (MODY) can support precision diabetes management. However, diagnosing MODY is challenging due to overlapping clinical features with type 2 diabetes. We aimed to develop a prediction model for identifying Chinese with high likelihood of MODY for further genetic testing.

Methods

We developed a logistic regression model using clinical data from an unselected cohort of 1021 Chinese with young-onset (age at diagnosis ≤ 40) non-type 1 diabetes enrolled in the Hong Kong Diabetes Register, 1.9% (n = 19) of whom had MODY (GCK-, HNF1A-, HNF4A- and HNF1B-MODY) by molecular confirmation. We validated the model in an independent local cohort of 822 Chinese with young-onset non-type 1 diabetes. We compared the performance of the new Chinese-specific MODY prediction model with an existing MODY probability calculator in the validation cohort.

Results

The prediction model comprised the following clinical variables: current age, age at diagnosis, sex, body mass index, systolic blood pressure, HDL-cholesterol, LDL-cholesterol, triglyceride and fasting C-peptide. It demonstrated acceptable discrimination of patients with MODY in the validation dataset, with an area under the curve of 0.813 (95% confidence interval 0.647–0.979). At the probability cut-off of 50%, the model achieved a sensitivity of 72.7% and a specificity of 92.4%. It allows identification of one MODY case in every nine genetic tests conducted.

Conclusion

We developed a comprehensive Chinese-specific MODY prediction model. This model can be used in unselected Chinese with young-onset non-type 1 diabetes to identify high-risk individuals for genetic testing.