cxx Variables 7 Clearly define all outcomes, exposures, predictors, potential confounders, and effect modifiers. Give diagnostic criteria, if applicable 7 Data sources/ measurement 8* For each variable of interest, give sources of data and details of methods of assessment (measurement). Describe comparability of assessment methods if there is more than one group 6, 7, 8. 9 Bias 9 Describe any efforts to address potential sources of bias Study size 10 Explain how the study size was arrived at 5
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