Pregunta:
1 (cohort, case control, cross-sectional, ecologic study) - researcher observes association between exposure and disease, estimates and tests it 2 (RCT, quasi experiment) - researcher assigns intervention (treatment), and estimates and tests its effect on health outcome.
Autor: LEIGHTON DWIGHT OBILLOSRespuesta:
1 Observational 2 Experimental
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