Prevalence, Cultural and Gender Variation, and Clinician Bias

Diagnosis does not happen in a vacuum. Who gets diagnosed with which disorder is shaped by culture, gender, and the judgments of individual clinicians, and understanding these influences is essential for evaluating the reliability and validity of diagnosis in the real world. Prevalence refers to the proportion of a population that has a disorder at a given time, and prevalence figures vary strikingly across groups and settings, raising the question of how much this reflects real differences in illness and how much reflects differences in diagnosis.

Consider gender variation. Depression and most anxiety disorders are diagnosed roughly twice as often in women as in men, a pattern found across many countries. Several explanations compete. Biological accounts point to hormonal influences and r