Critical appraisal:Spillane AJ, Cheung BL, Winstanley J, Thompson JF 2011 2

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Risk of bias assessment: cohort study

Subject selection
"New technology" group
Selected group
Comparison group
Selected group
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
Moderate risk of bias Additional comments: Please replace this text and include any additional comments in regards to your quality rating


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Article
Spillane AJ, Cheung BL, Winstanley J, Thompson JF. Lymph node ratio provides prognostic information in addition to american joint committee on cancer N stage in patients with melanoma, even if quality of surgery is standardized. Ann Surg 2011 Jan;253(1):109-15 Available from: http://www.ncbi.nlm.nih.gov/pubmed/21119509.
Assigned to
User:Lyndal.alchin
Topic area
Guidelines:Melanoma
Clinical question
Form
Form:Quality appraisal cohort


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