The extent to which a person's behavior coincides with the medical advice given. Patient is passive and just follows the doctor's advice.
Adherence
The extent to which the patient's behavior matches agreed recommendations from the prescriber. Patient is active and involved in the regimen.
Concordance
An agreement reached after negotiation between a patient and health care professional that respects the beliefs and wishes of the patient in determining whether, when and how medicines are to be taken. There is deep communication, mutual understanding and decision-making with the patient and the physician regarding the regimen.
The exact rate of adherence to medication regimens varies from study to study. However, regardless of definition and measurement, adherence rates are well below 100%. The consensus is that adherence rates for long-term therapies tend to be about 50%.
Methods to measure adherence
Indirect methods (Subjective)
Direct methods (Objective)
Indirect methods
Interview the patient or caregiver to know the factors of being non-adherent
Direct methods
Use biomarkers or laboratory testing
Most nonadherences have negative effects on patient health which, in turn, can result in increased emergency room and physician visits, hospitalizations, disability, premature death, and decreased productivity in the workplace.
Reasons for poor or nonadherence
Patients
Healthcare providers
Healthcare delivery system
Unintentional nonadherence
Forgot to take the medicine due to some reasons (e.g., being busy)
Intentional nonadherence
Skip doses of a medication due to an uncomfortable side effect or because it should not be taken with alcohol
False assumptions about patient understanding and medication adherence
Physicians have already discussed the medications
Patients understand all information provided
If patients understand what is required, they will be able to take the medication correctly
When patients do not take their medications correctly, they "don't care", "aren't motivated", "lack intelligence", or "can't remember"
Once patients start taking their medications correctly, they will continue to do so in the future
Physicians routinely monitor patient medication use
If patients are having problems, they will ask direct questions or volunteer information
Techniques to improve patient understanding
Emphasize key points
Give reasons for key advice
Give definite, concrete, explicit instructions
Provide key information at the beginning and end of the interaction
Supplement and reinforce spoken words with written instructions
Assessment of a patient's ability to read and understand key written instructions is required
End the encounter by taking feedback
Techniques to establish new behaviors
Tailoring of regimens
Provide appropriate adherence aids
Suggest ways to self-monitor
Monitor medication use
Make proper referrals
Techniques to facilitate behavior change
Establish a new habit
Change old habits
Stop existing habits
Components of motivation to change
Willingness
Perceived ability
Readiness
Empathic understanding
A core component that facilitates the patient's own problem-solving ability and frees patients from the fear that they are being judged because of their behavior.