Wong 2009.

Methods	Retrospective review
Participants	2 patients with bowel obstruction from gynaecological malignancy underwent 3 operations from September 2004 to August 2006 Part of larger group of 27 patients with stomach, colon (7), ovary, lung, gallbladder, small bowel, breast, bladder malignancy and thigh sarcoma
Interventions	All patients had undergone surgery
Outcomes	No postoperative deaths (within 30 days) in 2 patients with gynaecological malignancy All discharged patients able to tolerate oral medications and feeding
Notes	All other data not identifiable by malignancy type No data identifiable for those with colon cancer
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	"Clinical records for patients admitted over a two year period to our department for surgical palliation of bowel obstruction in advanced abdominal malignancy were reviewed retrospectively."
Allocation concealment (selection bias)	High risk	"These patient details were reviewed from morbidity and mortality presentations in the department weekly audit meetings."
Blinding (performance bias and detection bias) All outcomes	High risk	"These patient details were reviewed from morbidity and mortality presentations in the department weekly audit meetings."
Blinding of participants and personnel (performance bias) All outcomes	High risk	"Clinical records for patients admitted over a two year period to our department for surgical palliation of bowel obstruction in advanced abdominal malignancy were reviewed retrospectively."
Blinding of outcome assessment (detection bias) All outcomes	High risk	"Clinical records for patients admitted over a two year period to our department for surgical palliation of bowel obstruction in advanced abdominal malignancy were reviewed retrospectively."
Selective reporting (reporting bias)	Unclear risk	Not all outcomes identifiable by malignancy type