Illness Anxiety Disorder is typically described as chronic and relapsing with onset in early to middle adulthood.

• A. True
• B. False
• C. Early to middle adulthood
• D. Late adulthood

Answer: (C)

Illness Anxiety Disorder most often begins in early adulthood and can have a chronic, relapsing course over time. The aspect clinicians emphasize is the typical window of onset, which is early to middle adulthood. Describing onset as "Early to middle adulthood" directly reflects this common timing, making it the best descriptor for when the condition tends to start. Late adulthood is less typical for onset, and focusing on the onset window provides the most precise answer about when this disorder usually first appears.