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| Experimental Condition | BEGIN Intervention Componentsa | |
|---|---|---|
| Decision Aid | Text Messaging | |
| a | On | Off |
| b | Off | On |
| c | On | On |
| d | Off | Off |
Main effects of an intervention component are estimated by comparing clinics in an experimental condition where the component is turned “On” to those where it is turned “Off.” For example, the main effect of the decision aid is (a+c) – (b+d).
