Examples of study designs commonly used in the evaluation of injury interventions: experimental designs
| Adapted from Shortell and Richardson, 1978.23 | |
| (1) Post-test only control group design | |
| Randomize then: | |
| Group 1 | Intervene→observe |
| Group 2 | No action→observe |
| Examples: assessed softball player sliding injuries as teams randomly rotated to play on ballfields with and without breakaway bases in Michigan39; assessed seat belt use after television messages were broadcast to population on one of two television cable systems in a test community1; assessed fall rates after elderly group randomized into fall prevention program in Connecticut52 | |