a)Identify the cases in this study
The cases are the 600 asthma patients.
b) Identify the variables and their types in this study
One variable is whether they did Buteyko breathing or not? This variable is categorical.
The other variables are “quality of life”, “activity”, “asthma symptoms”, and “medication reduction”.
They are all on a scale of 0 to 10, so they are numerical.
c) Identify the main research question in this study.
Does the Buteyko breathing method improve quality of life and reduce asthma symptoms?