Peng 2011.

Methods	Cohort Prospective Cross‐sectional
Participants	154 patients (88 men, 66 women) APE 75, AR 79. Rectal cancer patients treated with curative intend in single centre and meeting predefined inclusion criteria. China
Interventions	Quality of life assessment with EORTC‐C30/CR29
Outcomes	Quality of life
Notes	Evidence level: 2B. Not stated: Dukes grade, level of anastomosis in AR group, pouch.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	High risk	Prospective, cross‐sectional cohort study. Rectal cancer patients who had undergone surgery and meet predefined inclusion criteria were invited to participate.
Blinding (performance bias and detection bias) Anterior resection or abdominoperineal resection	High risk	Blinding not possible due to surgical therapy.
Incomplete outcome data (attrition bias) Quality of life	Low risk	All included patients completed the study.
Selective reporting (reporting bias)	Low risk	All QoL data reported.