“…Furthermore, this work will incorporate expert recommendations (DiMatteo, ; Vrijens, Antoniou, Burnier, de la Sierra, & Volpe, ) to assess adherence using multiple direct and indirect measurement methods (i.e., self‐report, pharmacy refill data, and urine assay). Previous research has suggested that, while measurement type significantly moderates adherence estimates (Durand et al ., ), combining measures of adherence improves measurement sensitivity and increases diagnostic accuracy (Liu et al ., ; Schäfer‐Keller, Steiger, Bock, Denhaerynck, & De Geest, ). Therefore, this study will utilize a composite adherence measure that incorporates both direct and indirect measures of adherence to provide a comprehensive adherence assessment.…”