Using the lesson’s one-year prevalence estimates (anorexia females 0.16% vs males 0.09%; bulimia females 0.32% vs males 0.05%; binge females 1.0% vs males 0.25%), which disorder shows the largest female-to-male ratio based on these figures?

• A. Anorexia nervosa, because it always has the highest sex disparity across all studies.
• B. Binge eating disorder, since it is more common overall and thus must have the largest female-to-male ratio.
• C. All three show equal female-to-male ratios if age is accounted for, so no single disorder stands out.
• D. Bulimia nervosa, with a female-to-male ratio of about 6.4.

Answer: (D)