Epidemiology of Anorexia Nervosa

Prevalence rates of AN have varied in different studies according to sample used. Swanson, Le Grange, Swendsen and Merikangas for instance indicate the lifetime prevalence of AN in adolescents to be 0.3% for both males and females (2011, p. 716). Such lifetime prevalence in adults has been noted to be 0.6% in a different study (Hudson, Hiripi, Pope & Kessler, 2007, p. 350). A review published in Mayo Clinic Proceedings report the prevalence of AN to range from 0.5% to 1% (Sim, McAlpine, Grothe, Himes, Cockerill & Clark, 2010, p.746). Accordingly, AN’s prevalence rates could range from 0.3% to 1% depending on the population under consideration.

The incidence of AN remains ambiguous with some studies indicating an increase while others report stable rates (cited in Bulik et al., 2005, p. s3). The study by Hudson et al. (2007) for instance reports an insignificant increase in the incidence rate. With respect to peak age, Bulik et al. report that AN mainly develops in individuals between the ages of 15 and 19 years, but onset cases could occur even at prepubertal, mid-life and late-life stages (2005, p. s3). go to part 4 here

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