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Engagement indicators predict health changes in a lifestyle intervention.

OBJECTIVE
To evaluate the utility of several participant engagement indicators for predicting health changes in a church-based lifestyle intervention shown effective for improving dietary, physical activity, and clinical outcomes.


METHODS
Descriptive indicators were constructed using 2 participant engagement measures - education session attendance (EDA) and exercise class attendance (EXA) - separately and combined. Relationships of 6 engagement indicators to health outcomes were tested using generalized linear mixed models.


RESULTS
EDA predicted 5 dietary and 1 clinical outcome, whereas EXA predicted one physical activity and one clinical outcome. The combined indicator predicted the same 7 outcomes.


CONCLUSION
Use of single engagement indicators specific to each intervention component is advocated for predicting relevant health outcome.