Comparison of different ways of calculation (DDD vs. SPC) to determine persistence and compliance with beta blockers in the DAPI database

Miriam Ude, Katrin Schüssel, Sittah Czeche, Kristina Leuner, Walter E. Müller & Martin Schulz
Background: To determine persistence and compliance with pharmacy claims data, the prescribed daily dosage (PDD) should be known. Because it is not compulsory for physicians in Germany to note this information on the prescription, other ways of calculation like the DDD of the WHO [ref:1] o[for full text, please go to the a.m. URL]