How do you interpret the Morisky medication adherence scale?

In the study titled, “Criterion validity of 8-item Morisky Medication Adherence Scale in patients with asthma” the 8-item MMAS was significantly associated with asthma control and quality of life. Patients who scored 8 points, <8 to >6 points and ≤6 points on the scale were considered to have high, medium and low adherence, respectively. High, medium and low adherence was found in 53%, 23% and 24% of the patients, respectively.
This study shows that medication adherence is associated with asthma control as well as with quality of life in patients with asthma. The 8-item MMAS is valid for assessing medication adherence in patients with asthma. Adherence as assessed by the scale can predict health outcomes in patients with asthma.

​https://pmc.ncbi.nlm.nih.gov/articles/PMC5708647/#:~:text=The%208%2Ditem%20MMAS%20was,%25%20of%20the%20patients%2C%20respectively.