In addition, the authors’ methodological and statistical procedures were flawed. Random sampling cannot be achieved by a "prescribed formula." The variables assessed did not appear driven by theory. Thus, while their logistic regression appeared sophisticated, the variables it analyzed were not. The most striking problem concerned their interpretation of the data. They reported that "[the disorders] should be included [in DSM-IV] only with reservations" as the modal response. Nevertheless, a sign test shows no significant differences between this group and the group that opted for inclusion without reservations. Thus, the more reasonable interpretation is that the overwhelming majority of responders indicated acceptance—with or without reservations.