Fig. 1From: Volatile organic metabolites identify patients with gastric carcinoma, gastric ulcer, or gastritis and control patients a PCA score plot: gastric carcinoma patients vs controls. b OPLSDA score plot: gastric carcinoma patients vs controls: (4 components, R2X = 0.507, R2Y = 0.676, and Q2 = 0.439). c PLSDA validation plot intercepts: gastric carcinoma patients vs controls R2 = (0.0, 0.164); Q2 = (0.0, − 0.161)Back to article page