Wani 2002.

Methods	Single‐centre trial. Randomised trial: prospective study with patients systematically divided. Generation of allocation: unclear. Allocation concealment: unclear. Blinding: not performed. Follow‐up: unclear. Drop‐outs: none mentioned. Intention‐to‐treat: not mentioned. Sample size calculations: no.
Participants	Patients with chronic calculus cholecystitis. In‐ and exclusion criteria: not very well described. Comparability groups: well matched.
Interventions	SIC versus OC. SIC: incision of 5 cm to 7 cm length with two well illuminated retractors, dissected either duct first or fundus first. OC: right subcostal incision of 10 cm to 15 cm. Antibiotic prophylaxis: not mentioned. Intra‐operative cholangiography: not mentioned
Outcomes	Primary and secondary outcome: not mentioned. Outcome measures: pulmonary function. Duration of follow‐up: not mentioned (hospital stay).
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear
Blinding? All outcomes	High risk
Free of selective reporting?	High risk
Free of other bias?	Unclear risk	short follow‐up

LC ‐ laparoscopic cholecystectomy, 
 SIC ‐ small‐incision cholecystectomy, 
 OC ‐ open cholecystectomy.