Table 1. Final classification scheme of patients, according to the treatment intake and the presence of the medication blister packaging.

Intake	Blister packaging	Final classification
Incomplete	Present	Certain non-adherence (pills remaining)
Incomplete	Not present	Probable non-adherence (patient describes incomplete number of pills taken)
Incorrect	Present or not	Probable non-adherence (patient describes incorrect time schedule or dosage)
Correct	Present or not	Probable adherence (patient describes correct number of pills taken, time schedule and dosage)