Zheng 2012.

Methods	N‐butyl‐2‐cyanoacrylate vs. band ligation for active bleeding from gastric varices. Abstract only. Generation of allocation sequence: unclear; concealment of allocation sequence, unclear. Blinding: participants and personnel: unclear. Intention‐to‐treat: unclear. Interim analysis: unclear. Follow‐up period: no data.
Participants	Republic of China. Single‐centre randomised trial. 58 adults, bleeding actively from gastric varices. Type of gastric varices: no data. Cirrhosis of the liver: no data. Hepatocellular carcinoma: no data. Demographics and clinical characteristics in both groups: no data. Same general treatment for both groups: somatostatin and protein pump inhibitor before intervention.
Interventions	Experimental: cyanoacrylate 0.5 mL plus lipiodol 0.5 mL, injected intravariceally. Control: endoscopic band ligation, no data.
Outcomes	Bleeding control rate. Re‐bleeding rate (at 2 years). Complication rate. Survival.
Notes	Only abstract available. Full paper was not available. We wrote e‐mails to Bin Wu, MD, PhD, Professor and Chief, Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat‐Sen University, Guangzhou (19 February 2013), and to the organisation of the VL: Conference: Asian Pacific Digestive Week 2012 Bangkok Thailand were the abstract was presented to try to contact to the authors but we received no response.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Randomised trial. No details available (abstract).
Allocation concealment (selection bias)	Unclear risk	No details available (abstract).
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	No details available (abstract).
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No details available (abstract).
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	No details available (abstract).
Selective reporting (reporting bias)	Unclear risk	No details available (abstract).
Other bias	Unclear risk	Not possible to judge (abstract).

EVL: endoscopic variceal ligation; GOV1: type I gastric varices; GOV2: type II gastric varices; IGV1, isolated gastric varices.