Publications by authors named "Thomas Sheperd"
Purpose: This study was intended to identify characteristics of those who adhere poorly to calcium/vitamin D and estrogen replacement protocols, and aimed to assess the effects of ethnicity, socio-economic status, and health status on medication adherence.
Methods: The adherence rates of 107 older white, African American and Hispanic participants of a clinical trial involving calcium/vitamin D and either estrogen replacement or placebo therapy were analyzed. Structural equation modeling was used to test the hypothesis that minority participants would have lower adherence rates than white participants, but only if they had lower household incomes and educational achievement, more osteoporosis risk factors, negative health assessments, and fewer somatic complaints than white participants.