GPT and Insulin resistance: In addition, the transaminase serum concentrations (aspartate aminotransferase (ASAT), +36%, p = 0.027; alanine aminotransferase (ALAT), +27%, p = 0.005) as well as the homeostasis model assessment of insulin resistance (HOMA-IR, +69%, p = 0.006) were significantly increased in the obese patients.