The sensitivity, specificity, predictive values, and likelihood ratios will be reported. These will be calculated from data in the study if not reported by the authors. Reviews not stating the method of locating studies will not be reviewed. Reviews not stating methods of including or excluding studies will not be reviewed. Reviews not stating the method used to assess the validity of the original studies will not be reviewed .
Reviews can include or exclude studies based on quality scores.
Published methods of assessing relevance or validity of others can be referenced or new criteria can be described. Generally, validity assessment should be performed independently by at least two investigators. Heterogeneity in study results should be evaluated and, if present, explained. When results from different studies are combined, only similar outcomes should be combined. Reviews that attempt to convert study results from one scale to another generally won't be considered.