Levels of MSTN (OR = 0.736, 95% CI 0.439–0.906; p = 0.0273) and Act A (OR = 0.665, 95% CI 0.379–0.974; p = 0.0229) were shown to be predictors of sarcopenia in the IBD patients after adjusting for age, gender, and BMI of the subjects (Table 6). This evidence concerns the gene MSTN and sarcopenia.