I want to know the answer to the following question:
What is the rate that is used in most of the evidence?
All the background I'm provided with is that "Other supportive evidence includes: a ≥20% difference in peak expiratory flow rate on at least three days in a week for at least two weeks, a ≥20% improvement of peak flow following treatment with either salbutamol, inhaled corticosteroids or prednisone, or a ≥20% decrease in peak flow following exposure to a trigger.". Is that enough to answer the question?
Answer: yes