A. Feeding disturbance as manifested by persistent failure to eat adequately with significant failure to gain weight or significant loss of weight over at least 1 month.
B. The disturbance is not due to an associated gastrointestinal or other general medical condition (e.g., esophageal reflux).
C. The disturbance is not better accounted for by another mental disorder (e.g., Rumination Disorder) or by lack of available food.
D. The onset is before age 6 years.
Reprinted with permission from the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision. Copyright 2000 American Psychiatric Association