Use of Unannounced Telephone Pill Counts to Measure Medication Adherence Among Adolescents and Young Adults Living With Perinatal HIV Infection.

Objective: To examine unannounced telephone pill counts as a measure of adherence to antiretroviral therapy among adolescents and young adults living with perinatal HIV infection.

Methods: Participants were recruited from an ongoing longitudinal study to complete four monthly, unannounced telephone pill counts. Detailed notes concerning participants' medication habits surrounding adherence were recorded.