Fig. 7From: Machine learning-based nomogram for 30-day mortality prediction for patients with unresectable malignant biliary obstruction after ERCP with metal stent: a retrospective observational cohort studySchoenfeld residuals analysis of risk groups. A Hazard ratio in different risk groups. B L, low-risk group. M, moderate-risk group. H high-risk group.95% CI, 95% confidence intervalBack to article page