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Age‐specific incidence estimates are important and useful facts in psychiatric epidemiology, but incidence estimation can be challenging. Methods artifacts are possible. In the United States, where the minimum legal drinking age is 21 years, recent cross‐sectional field research on 12‐ to 25‐year‐olds applied conventional “age‐at‐assessment” approaches (AAA) for incidence estimation based on 12‐month...
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