Drinking Problems
The data and functions represent older men's and women's Drinking Problems Index scores over time from the following study:
Brennan, P. L., Shutte, K. K., Moos, B. S., and Moos, R. H. (2010). Twenty-year
alcohol-consumption and drinking-problem trajectories of older men and women. Journal of Studies of Alcohol, 72, 308–321.