July 2012 Towns that implemented a drug abuse prevention program called Communities That Care will see a return of $5.30 for each $1 they invested during the 5-year trial of the intervention, according to a cost-benefit analysis. The estimate is based on reductions in smoking and delinquency observed during the fourth year of the study among eighth-graders and the projected total costs of smoking, delinquency, and crime avoided over the lifetimes of study participants.
February 2018 Researchers used the statistical technique of latent class analysis to describe distinct patterns of marijuana use across age using data from nearly 10,000 participants in the Monitoring the Future study. Longer-term marijuana use (extending from age 18 into the late 20s or beyond) was associated with increased risk of self-reported health problems at age 50.
April 2014 Almost one-third (32 percent) of the roughly 42,000 Monitoring the Future survey respondents reported having used marijuana during their lifetime. However, abuse of many other drugs—methamphetamine, heroin, cocaine, and some prescription medications—declined.