ALT alanine aminotransferase; 5-ASA 5-aminosalicylic acid, BMI body mass index, CDAI Crohn’s Disease Activity Index, CI confidence interval, CMV cytomegalovirus, CRP C-reactive protein, IBD inflammatory bowel disease, WBC white blood cell, OR odds ratio; *p < 0.05, calculated using logistic regression analysis. The gene discussed is GPT; the disease is Crohn disease.