Data Collection and Procedures
high-density lipoprotein
PARATHYROID, BLOOD
Clinical data including age, gender, weight, body mass index (BMI) before surgery, comorbidities, and medication use were obtained during hospitalization. Blood tests comprising total bilirubin, alkaline phosphatase (ALP), γ-glutamyl transferase (GGT), aspartate aminotransferase (AST), alanine aminotransferase (ALT), total cholesterol, low-density lipoprotein (LDL), high-density lipoprotein (HDL), triglycerides, leukocytes count, C-reactive protein (CRP), hemoglobin A1c (HbA1c), hemoglobin (Hb), platelet count, prothrombin time (PT), total protein, albumin, and calcium were performed as part of regular care at the outpatient clinic before and 6 months after surgery. Parathyroid hormone (PTH) and vitamin D were only measured after surgery. Preoperative blood values were included when obtained up to a maximum of 1 year before bariatric surgery. For postoperative blood values, a window of 4 to 9 months after surgery was applied.