Longitudinal stability of medication adherence among adolescent solid organ transplant recipients.

Solid organ transplantation requires ongoing adherence to immunosuppressants and other medications. Although adolescence is a risk factor for poor medication-taking, little is known about the patterns of adherence within individuals over time. This study aimed to examine the stability of adherence over time using three different assessment techniques. Sixty-six AYA transplant recipients and/or their caregiver completed interviews of adherence at baseline and at least one yr later. Serum immunosuppressant assay levels were collected via medical chart review. Non-adherence percentages based on AYA report, caregiver report, and bioassay did not differ from Time 1 to Time 2. However, correlations for these measures across time were non-significant. Further, the majority of AYAs shifted to a different adherence category from Time 1 to Time 2. Overall, these results demonstrate individual variability in non-adherence over the course of adolescence and young adulthood and highlight the importance of frequent assessment across time for solid organ transplant recipients.