Medication adherence can be measured using various methods:
1. Self-reported questionnaires: These are easy to administer but may be subject to recall bias. 2. Pharmacy refill records: These provide objective data but do not confirm if the medication was actually taken. 3. Electronic monitoring devices: These offer precise adherence data but can be expensive and burdensome for patients. 4. Biological markers: These are highly accurate but invasive and costly.
