Journal of the American Academy of Child & Adolescent Psychiatry
ArticlesEpidemiology and Natural Course of Eating Disorders in Young Women From Adolescence to Young Adulthood
Section snippets
Participants
Participants were randomly selected from 9 senior high schools in western Oregon who completed initial assessments (T1; n = 1,709) between 1987 and 1989. Approximately 1 year later, 1,507 of the participants (88%) returned for the readministration of the interview and questionnaire. Statistically significant differences between participants and those who declined to participate and those who dropped out of the study before T2 were small (additional details are provided by Lewinsohn et al., 1993
Prevalence and Incidence of Eating Disorders During Adolescence and Young Adulthood
The lifetime prevalence rates for AN and BN at each of the 3 assessments are shown in Table 1. The lifetime prevalence rates of AN and BN are very low, ranging from 0.6% for AN at T1 to 2.8% for BN at T3 (weighted); the PS-AN and PS-BN prevalence rates range from 0.8% at T1 to 2.5% at T3 (weighted). No current cases of AN were observed at any of the assessments, and the rates for current BN did not exceed 0.5%.
First incidence was determined for disorders occurring during childhood/adolescence
DISCUSSION
Consistent with previous major epidemiological studies conducted in North America (e.g., Garfinkel et al., 1995b), the lifetime prevalence of AN and BN was low and these disorders were found to be disorders of adolescence. The relatively younger age of onset in AN compared with BN is consistent with reports in the literature. For example, Turnbull et al. (1996) found the highest incidence of AN was for females aged 10 through 19 years, whereas the highest incidence of BN was among females aged
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This research was supported in part by NIMH awards MH40501 and MH50522.