Critical appraisal:Habr-Gama A, Perez RO, Nadalin W, Sabbaga J, Ribeiro U Jr, Silva e Sousa AH Jr, et al 2004 4

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Risk of bias assessment: cohort study

Subject selection
"New technology" group
Representative of eligible patients.
Comparison group
Representative of eligible patients
Comparability of groups on demographic characteristics and clinical features
Comparable
Measurement of outcomes
Outcome measures blind to technology used
No, but objective measures used
Same method of measurement used across comparison groups
Yes
Completeness of follow-up
Was follow-up complete and were all patients included in the analysis?
Yes (follow-up >95%) or survival analysis using all patients
Overall risk of bias
Low risk of bias Additional comments:


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Article
Habr-Gama A, Perez RO, Nadalin W, Sabbaga J, Ribeiro U Jr, Silva e Sousa AH Jr, et al. Operative versus nonoperative treatment for stage 0 distal rectal cancer following chemoradiation therapy: long-term results. Ann Surg 2004 Oct;240(4):711-7; discussion 717-8 Available from: http://www.ncbi.nlm.nih.gov/pubmed/15383798.
Assigned to
User:Melissa.chow
Topic area
Guidelines:Colorectal cancer
Clinical question
Form
Form:Quality appraisal cohort


Section below only relevant for Cancer Council Project Officer

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