Several inflammatory biomarkers may indicate malnutrition risk if increased at baseline, such as C-reactive protein (CRP) [OR 2.59, 95% CI 1.71–3.93 (p = 0.005)], or indicate malnutrition-related complication risk like neutrophil-to-lymphocyte ratio [esophageal—OR 7.35, 95% CI 4.58–11.80 (p < 0.001); gastric—OR 6.44, 95% CI 1.71–24.23 (p = 0.026); and CRC—OR 3.61, 95% CI 2.00–6.55 (p = 0.004)]. The gene discussed is CRP; the disease is nutritional deficiency disease.