9.3  Study designs and identifying the unit of analysis

9.3.1 Unit-of-analysis issues

9.3.2 Cluster-randomized trials

9.3.3 Cross-over trials

9.3.4 Repeated observations on participants

9.3.5 Events that may re-occur

9.3.6 Multiple treatment attempts

9.3.7 Multiple body parts I: body parts receive the same intervention

9.3.8 Multiple body parts II: body parts receive different interventions

9.3.9 Multiple intervention groups