“…However, a number of studies have reported no association between age and the likelihood of completing treatment (Claus, Kindleberger, & Dugan, 2002;Robinson & Little, 1982), making it difficult to draw definitive conclusions regarding age and treatment dropout. Race/ethnicity While some studies have reported that race has little effect on treatment dropout (McFarlain, Cohen, Yoder, & Guidry, 1977;Raynes & Patch, 1973;Sells, Chatham, & Joe, 1972), it has been suggested that Caucasians have higher completion rates than African Americans and Hispanics (Kleinman, Kang, Lipton, & Woody, 1992). In the majority of studies reporting differences in race/ethnicity, the role of race/ethnicity in dropout is not a primary aim, making it unclear from the results that these differences were not confounded by age, employment levels, or education levels.…”