Fig. 2

Performance analysis of a the NLR (a), the CRP (b) values, or a predictive score (c) for mortality at one year in a series of 235 patients of more than 64 years after surgery for hip fracture. Score is based on sex (1 = male), age (1 = more than 74 years, 2 = more than 84 years) and NLR at D5 (1 if > 5). Areas under the curve (AUC) are, for NLR, 0.59 [95 % CI 0.51–0.66](P = 0.02 vs. AUC = 0.5) with an with an optimal cut-off value of 4.9 (a); for CRP, 0.53 [95 % CI 0.45–0.61](P = 0.42 vs. AUC = 0.5), with an optimal cut-off value of 7.65 mg/dL (b), and, for the composite score, 0.72 [95 % CI 0.65–0.79] (P < 0.001 vs. AUC = 0.5)