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