A trend for age at diagnosis and waist circumference similar to the one described in type 2 diabetes, LADA and type 1 diabetes was also found among LADA subjects when subdividing by positivity for anti-IA2, GADA or for both antibodies (p = 0.013 for trend of age at diagnosis and p = 0.011 for trend of waist circumference) (Table 2 and S3 Table). Here, PTPRN is linked to type 2 diabetes mellitus.