title: The design and use of cluster randomised controlled trials in evaluating injury prevention interventions: part 2. Design effect, sample size calculations and methods for analysis.
authors.affiliation: Division of Primary Care, University of Nottingham, UK. Carol.coupland@nottingham.ac.uk
authors.forename: Carol
authors.initials: C
authors.lastname: Coupland
authors.forename: Carolyn
authors.initials: C
authors.lastname: DiGuiseppi
mesh_terms: D016000:Cluster Analysis; D003627:Data Interpretation, Statistical; D006293:Health Promotion / Q000379:methods; D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D012107:Research Design; D018401:Sample Size; D014947:Wounds and Injuries / Q000517:prevention & control*