GPT and diabetes mellitus: However, no significant differences were noted between the two groups in terms of height, body fat percentage, smoking history, alcohol consumption, diabetes mellitus, cardiovascular diseases, Charlson Comorbidity Index, hemoglobin, alanine aminotransferase, aspartate aminotransferase, urea, serum calcium, and 25-hydroxyvitamin D levels (all p > 0.05).