Who participated in the CaD Trial?
Participants in the Hormone and Dietary Trials were invited to join the CaD Trial 1 to 2 years after joining the WHI. Between 1995 and 2000, a total of 36,282 participants joined the CaD Trial. These women were 50 to 79 years old when they first joined the WHI, represented diverse racial and ethnic groups, and were generally healthy and not at high risk for fracture.
