Critical appraisal:Kropp L, Balamucki CJ, Morris CG, Kirwan J, Cognetta AB, Stoer CB, et al 2013 3

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Risk of bias assessment: cohort study

Subject selection
"New technology" group
Selected group
Comparison group
Highly selected or not described
Comparability of groups on demographic characteristics and clinical features
Not comparable and not adjusted for differences
Measurement of outcomes
Outcome measures blind to technology used
No, but objective measures used
Same method of measurement used across comparison groups
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
High risk of bias Additional comments:

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Kropp L, Balamucki CJ, Morris CG, Kirwan J, Cognetta AB, Stoer CB, et al. Mohs resection and postoperative radiotherapy for head and neck cancers with incidental perineural invasion. Am J Otolaryngol 2013 Sep;34(5):373-7 Available from:
Assigned to
Topic area
Guidelines:Keratinocyte carcinoma
Clinical question
Form:Quality appraisal cohort
Overall survival; Cause-specific survival; Local control

Section below only relevant for Cancer Council Project Officer

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