Patients with normal ALT had higher BMI (27.0 ± 5.5 vs. 25.6 ± 5.6, p-value < 0.001), had higher rates of hypertension (7.7% vs. 6.5%, p-value < 0.001) diabetes mellitus (10.1% vs. 8.6% p-value < 0.001) and history of ischemic heart disease (3.6% vs. 3.1% p-value = 0.011). The gene discussed is GPT; the disease is diabetes mellitus.