Liao 2010b.

Methods	Study design: controlled before‐after Sampling frame: combination of banks of telephone numbers and listed telephones (target group surnames) Sampling method: random‐digit telephone survey Collection method: telephone survey (or in‐person survey in some communities) (n = 221,256) Description of the community coalition: Study authors state that each coalition comprised a community‐based organization and at least 3 other organizations, of which 1 was a local or state health department, university, or research organization
Participants	Communities: 22 communities in 16 states Country: USA Ages included in assessment: 18 and older Reasons provided for selection of intervention community: communities focusing on cardiovascular disease or diabetes with targeted racial/ethnic groups (black, Hispanic, Asian, and American Indian/Alaskan Native) Intervention community (population size): unknown Comparison community (population size): unknown
Interventions	Name of intervention: Racial and Ethnic Approaches to Community Health (REACH) Theory: Social‐Ecologic Model Aim: to reduce health disparities among targeted groups (increase prevalence of blood cholesterol screening) Description of costs and resources: unknown Components of the intervention: Interventions included health communication campaigns and health education and promotion programs and varied among communities Start date: 2002 Duration: 60 months
Outcomes	Outcomes and measures: prevalence of blood cholesterol screening from survey data and relative disparity ratios compared with general population Time points: annual risk factor surveys (2002 to 2006)
Notes	Funding source: government funding
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	Not randomized
Allocation concealment (selection bias)	High risk	Not randomized
Baseline outcome measurement similar	Low risk	Same survey
Baseline characteristics similar	High risk	Baseline characteristics differed
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Population‐based telephone survey
Incomplete outcome data (attrition bias) All outcomes	Low risk	Population‐based telephone survey
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Telephone survey respondents not necessarily aware of intervention
Protection against contamination	Low risk	Interventions occurred in different cities
Selective reporting (reporting bias)	Low risk	Relevant outcomes reported