For the study, Bell and a team of researchers from UC Davis, the
University of California, San Francisco, and the University of Rochester
conducted follow-up phone interviews with 1,054 adult Californians who had
participated in the 2008 California Behavioral Risk Factor Survey System.
Participants both with and without a history of depression were asked to rate
how strongly 11 different reasons for nondisclosure would influence their
decision not to seek help from a primary care physician for depressive symptoms.