Observational and clinical trial findings on the comparative effectiveness of diabetes drugs showed agreement
Diabetes Mellitus, Type 2
Hemoglobin A, Glycosylated
An observational study of diabetes drug effectiveness showed convergent validity with randomized data. This supports cautious use of the observational research to draw conclusions about drug effectiveness in populations not studied in clinical trials. This approach may be useful in other situations where observational and randomized data need integration.