Distribution of ever used marijuana, cocaine, or opiates

Participants 45 or older at wave 1

1729 participants have medical history data of whom 1061 ever used marijuana, cocaine, or opiates.

1006 participants used marijuana, 507 used cocaine, and 312 used opiates.

Participants 50 or older at wave 1

1223 participants have medical history data of whom 686 ever used marijuana, cocaine, or opiates.

653 participants used marijuana, 306 used cocaine, and 183 used opiates.