Is the ASTROPU actually a suitable vertical scale for Dianette?
• Dianette is given to young women. • ASTROPUs are heavily weighted by the number of elderly patients. Therefore, unsurprisingly, a particular Practice with a big population of students (who commonly have acne and sex) gets a high rate of Dianette per ASTROPU, and another Practice where many many residents are elderly gets a low rate…not because of any difference in the doctors, or the patients who take Dianette, but because the ASTRO-PU is the wrong denominator.