APEA Predictor Practice Exam 2026 - Free Predictor Exam Practice Questions and Study Guide

Individuals diagnosed with anorexia nervosa typically present with a significantly low body mass index (BMI). A BMI of less than 18 is generally considered a critical threshold indicative of undernourishment and associated with the disorder. Those with anorexia often exhibit extreme weight loss behaviors that result in a BMI below this level, reflecting a severe state of malnutrition and posing serious health risks.

A BMI of 18.5 is often regarded as the minimum threshold for normal weight. While options like 20 and 19 also fall within the normal range, they do not accurately represent the severe underweight condition seen in anorexic patients. Therefore, a BMI of 18 or lower is indicative of the severe malnutrition and body weight loss that characterizes anorexia nervosa. This makes the information fitting for clinical assessments of patients who may be struggling with this mental health condition.