Does anyone knows studies / reviews about methods to reduce attrition or drop-out in longitudinal studies ?
Moreover, applied researchers have documented a range of retention strategies that may be employed during longitudinal studies (see Capaldi & Patterson, 1987; Cotter, Burke, Loeber, & Navratil, 2002).
We have conducted a number of longitudinal studies. Below is a paper that details some of the methods that we found most effective. There are also a few other strategies such as hiring study staff with key "people" skills and never going more than a few months without contacting study participants.
Oman RF, Vesely, SK, Aspy CB, Fluhr J, Marshall L, Calhoun G, Rodine S. (2009). Methodological considerations in a community-based longitudinal study. American Journal of Health Behavior, 33(1):58-68.
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