PTPRN and type 1 diabetes mellitus: On the contrary, subjects positive for GADA only and subjects positive for anti-IA2 only significantly differed from type 1 diabetes for higher systolic blood pressure (p = 0.012 and p = 0.004 for GADA only and anti-IA2 only vs type 1 diabetes, respectively), waist circumference (p<0.001 and p<0.001), BMI (p = 0.009 and p = 0.005), age at diagnosis (p = 0.05 and p<0.001) and for lower HbA1c (p = 0.002 and p<0.001).