GAD1 and diabetes mellitus: SPIDDM, slowly progressive type 1 insulin-dependent diabetes mellitus; N/A, not available; BMI, body mass index; SBP, systolic blood pressure; DM, diabetes mellitus; AITD, autoimmune thyroid disease; anti-GAD, anti-glutamic acid decarboxylase; anti-IA-2, anti-insulinoma-associated antigen-2; HbA1c, hemoglobin A1c; UACR, urine albumin-to-creatinine ratio; eGFR, estimated glomerular filtration rate; HDL-C, high-density lipoprotein cholesterol; LDL-C, low-density lipoprotein cholesterol; TG, triglycerides; UA, uric acid; hs-CRP, high-sensitivity C-reactive protein