Self-reported adherence to medication was measured by the
number of pills clients self-reported as missed in an average
week (Craig, 1985). Participants were asked to respond to the
question “Remembering to take medications is difficult. In an
average week, how many pills have you missed taking?” Using
this measure, Ireland et al. (2010) found that any report of
missedmedication taking was an independent predictor of SPC
clients’ non-achievement of national guideline blood pressure
targets (Lindsay et al., 2008).