Serum type IV collagen level is predictive for esophageal varices in patients with severe alcoholic disease

Figure 1 Flow chart of patients in this study. EV: Esophageal varice.

Figure 2 Two independent factors correlated with the appearance of esophageal varices. Collagen: Collagen type IV (ng/mL); (+): Positive patients; (-): Negative patients.

Figure 3 The positive predictive value for esophageal varices of collagen type IV. Y-axis: Positive percentages of esophageal varices; X-axis: The total predictive value of esophageal varices; > 300 (600, 900): The positive predictive value of esophageal varices with a collagen type IV value > 300 (600, 900) ng/mL.

Figure 4 Receiver operating characteristics (ROC) curve of collagen type IV for the diagnosis of esophageal varices [area under curve = 0. 7802, se (area) = 0.0704].