“…The earlier studies generally aimed to identify predictors of nonadherence and often were embedded within clinical trials; later studies often involved sub-analyses of intervention trials. Six studies set out specifically to evaluate adherence measures (i.e., Martin-Fernandez, Escobar-Rodriguez, Campo-Angora, & Rubio-Garcia, 2001;Martin et al, 2001;Murri et al, 2001;Vincke & Bolton, 2002;Wagner et al, 2001;Walsh, Mandalia, & Gazzard, 2002).…”