CRP and nutritional deficiency disease: Equally, the logistic regression model of ESR, CRP, and PG-SGA was statistically significant [Table 5; χ(4)2 = 11.407, p = 0.003], and this model explained 16.8% of the variation (Nagelkerke R2) with or without malnutrition and was able to correctly classify 76% of patients.