Unlike the literature on externalizing disorders that is reviewed below, there is little quality research on the impact of peers on adolescent depression. One study examined the correlates of depression among both American (53% Caucasian American) and Chinese 11th graders. The cross-sectional data provide some support for the theory that peer relationship quality can have an effect on mental health. Peer warmth was found to moderate various risk factors. For instance, high peer warmth and low number of risk factors was related to a lower number of depressive symptoms for the American sample. However, when the number of risk factors was high, mood did not vary by peer warmth. Longitudinal data are also consistent with the association of peer relationships with adolescent mental health. Aseltine, Gore, and Colten (1994) prospectively tracked a community sample of 939 (the initial sample of 1,208 consisted of 523 boys and 685 girls) predominantly Caucasian American 9th, 10th, and 11th graders over a two-year period. The researchers found that peer support had a negative relationship with depressive symptoms among adolescents who were depressed at the initial assessment. There were no associations among asymptomatic youth.