Participants
insomnia disorder
A total of 211 adults (132 women [63%]; mean [SD] age, 45.6 [14.9] years; 14 Black participants [7%], 11 Hispanic participants [5%], 182 White participants [86%], and 4 participants [2%] of other race or ethnicity [Asian (n = 2), Middle Eastern origin (n = 1), and not specified (n = 1)]) who met criteria for insomnia disorder (mean [SD] duration, 13.2 [12.5] years) were randomly allocated to BT (n = 104) or zolpidem treatment (n = 107) (