The negative association of independent personality and medication adherence.
OBJECTIVE: This investigation examines the association of personality factors and medication adherence among older adults. METHOD: The Six-Factor Personality Questionnaire was mailed to participants involved in a medication adherence investigation. Medication adherence was monitored with an electronic monitoring cap for 8 weeks for one prescribed daily medication. RESULTS: Sixty older adults, mean age 77 years (range 67 to 93 years), returned the questionnaire (69% response rate). Stepwise regression analysis demonstrates that when age and level of education are controlled, independence predicts medication adherence. This factor demonstrates a negative relationship with adherence suggesting that higher levels of independence may be related to lower adherence to prescribed medication. The facet component self-reliance is predictive of poor medication adherence. DISCUSSION: The finding that higher self-reliance is associated with lower adherence in an older population deserves further investigation and clinical consideration.