Kumar 2007.

Methods	Randomised clinical trial with parallel design Generation of the allocation sequence and allocation concealment: were not clearly described in the original article Follow‐up: adequate Duration of follow‐up: 4 weeks
Participants	Patients who were diagnosed with gastric cancer Country: Nepal Year of study: between January 2001 and December 2005 Number randomised: 108 Mean age (years): Group 1 (54.3 ± 11.2), Group 2 (57.5 ± 13.4) Sex (M/F): Group 1 (36/20), Group 2 (33/19) Inclusion criteria: not clearly record in the article
Interventions	Group 1: drain (n = 56), a single tube drain (28‐F) was used Group 2: no drain (n = 52) Antibiotic use: not stated All patients underwent subtotal gastrectomy, regardless whether it was radical or palliative, or D1 or D2 lymph node dissection. All surgical procedures were performed by consultant surgeons in the Surgical Department, Patan Hospital. Splenectomy or pancreatectomy was not clearly described
Outcomes	Mortality (30‐day mortality) Post‐operative complications Operation time Length of post‐operative hospital stay Initiation of soft diet
Notes	Drains were removed when the total output < 50 ml/24 hours Liquid diet was started after confirmation of bowel sound with passage of flatus and advanced to soft diet when the patients tolerated the liquid diet for at least 12 hours Patients were discharged from the hospital after tolerating a soft diet for at least 2 days
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Unclear
Allocation concealment (selection bias)	Unclear risk	Unclear
Blinding (performance bias and detection bias) All outcomes	Unclear risk	The authors did not record whether or not the drain was placed by a second surgeon
Incomplete outcome data (attrition bias) All outcomes	Low risk	Yes
Selective reporting (reporting bias)	Low risk	Yes
Other bias	Low risk	Yes