På trods af at alle tre analyser hentede deres oplysninger fra den samme database, var de i en vis udstrækning forskellige i udformning, definitioner, specifikke produkter, der blev sammenlignet, og den tidsramme, inden for hvilken patientoplysningerne blev undersøgt.
Although all three analyses derived their data from the same database, they differed in a certain extent from each other in terms of design, definitions, specific products that were compared and the time frame within which patients’ data was examined.