Fig. 3

Kaplan-Meier survival analysis and statistical analysis according to the individual and co-expression pattern of NGF and HO1 in gastric carcinomas. a Gastric carcinomas were grouped into four sub-groups according to co-expression pattern of NGF and HO1 and subjected to Kaplan-Meier survival analysis for the overall survival and relapse-free survival. NGF⁻/HO1⁻, NGF-negative and HO1-negative. NGF⁺/HO1⁻, NGF-positive and HO1-negative. NGF⁻/HO1⁺, NGF-negative and HO1-positive. NGF⁺/HO1⁺, NGF-positive and HO1-positive. b Receiver operating characteristic curve analysis for the event of overall survival (death of patients) according to the NGF-positivity, HO1-positivity, and co-expression pattern of NGF and HO1 sub-grouping gastric carcinomas into four or three. The area under the curve is largest when the gastric carcinomas are divided to three sub-groups according to co-expression pattern of NGF and HO1 (NGF⁻/HO1⁻, NGF⁺/HO1⁻ or NGF⁻/HO1⁺, and NGF⁺/HO1⁺)