Health Evidence is a research and service organization aimed at supporting Canada's public health decision makers in accessing and interpreting research evidence. The target audience for Health Evidence includes medical officers of health, policy makers, program managers, and frontline workers in public health. Given the audience, decision making may take place at the local level (such as public health units/regional health authorities), provincial level (such as ministries), or federal level (such as government). Our most widely accessible resource is the http://www.health-evidence.ca online registry of systematic reviews; a free, user-friendly, searchable database of public health relevant, qualityappraised systematic reviews published since 1985 evaluating the effectiveness of public health interventions. Given that unpublished literature, such as conference abstracts, provide little added value [22] , Health Evidence mainly focuses on published review literature. In order to identify the scope of interventions to include in the health-evidence.ca registry, qualitative interviews were conducted, as well as seeking organizational charts and information from every province and territory in Canada on the services public health units provide. Systematic reviews are considered relevant if: 1) the article is a review, which includes the synthesis of more than one primary study; 2) the intervention is relevant to public health practice; 3) the effectiveness of an intervention is evaluated; 4) the evidence on health outcomes is reported; and 5) the search strategy is described [19] . To assess the methodological quality, the following ten criteria are used: 1) a clearly focused question was stated; 2) inclusion criteria were explicitly stated; 3) a comprehensive search strategy was described; 4) an adequate number of years were covered in the search; 5) a description of the level of evidence was provided; 6) the methodological rigor of primary studies was conducted and results were described; 7) the methodological quality of primary studies was assessed by two reviewers and the level of agreement was provided; 8) tests of homogeneity or assessment of similarity of results across studies was conducted and reported; 9) appropriate weighting of primary studies was conducted; and 10) the author's interpretation of the results were supported by the data [19] . Each criterion is equally weighted and a final methodological score is tallied out of 10. Reviews with an overall rating of eight or more are considered strong, five to seven, moderate, and below four are considered to be weak in methodological quality.