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. 2012 Dec 12;2012(12):CD004323. doi: 10.1002/14651858.CD004323.pub4

Perez Lara 2004.

Methods Cohort 
 Prospective
Participants 116 patients identified through hospital records, 48 APE, 68 AR ( 78 men, 38 women) having Ro resection between 1994‐1999. Spain
Interventions EORTC‐CR38 
 Nottingham Health Profile.
Outcomes Quality of life
Notes Evidence level: 2B. 
 Not stated: Tumour and anastomotic distance fro anal verge; pouch.
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment (selection bias) High risk Prospective cohort study. Patients receiving intention‐to‐cure surgical treatment for rectal cancer were included.
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, though in figures.