Malnutrition prevalence: 36.1%↓weight, BMI, hemoglobin, albumin, parathyroid hormone, 25-hydroxyvitamin D, lumbar spine T-score, bone mineral density values, and trabecular bone score valuesBone status correlated with serum biomarkers of malnutrition, and GI symptoms. The gene discussed is PTH; the disease is nutritional deficiency disease.