Data on the incidence of T1D and T2D among racially and ethnically diverse young adults are sparse. To fill this gap, we conducted surveillance in a diverse population of 2.3 million members (15.3% Asian, 7.0% black, 34.6% Hispanic, 33.2% white, 9.9% other) of Kaiser Permanente California, in 2017, aged 20-45 years without recognized diabetes as of 12/31/2016. Incident cases were identified through electronic health records based on the following criteria: a) ≥2 ICD-10 diagnosis codes for diabetes, b) 1 ICD-10 diagnosis for diabetes plus ≥1 prescription for diabetes medication, or c) 1 ICD-10 diagnosis plus ≥2 glucose or HbA1c values diagnostic of diabetes according to the ADA criteria. T1D was defined based on >50% of ICD-10 codes indicating T1D.

We identified 7,862 incident diabetes cases in 2017: 122 (1.6%) T1D and 7,713 (98.1%) T2D. Age- and sex-standardized T1D and T2D incidence rates per 100,000 person-years are reported in the Table. The incidence of T1D was highest in white and black, followed by Hispanic and Asian individuals. The incidence of T2D was highest among Hispanic followed by black, Asian and white individuals.

In young adults, there are large racial and ethnic disparities in the incidence of T1D and T2D. Targeted disease management strategies are needed. Further research into possible etiological factors may identify targeted prevention strategies.


A. Ferrara: None. J.G. Alexander: None. S.B. Sridhar: None. J. Ritchie: None. J. Slezak: None. H.S. Takhar: None. L.I. Vega-Daily: None. S. Saydah: None. G. Imperatore: None. C. Quesenberry: None. J.M. Lawrence: None.


Centers for Disease Control and Prevention (1U18DP006289)

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