Anxiety disorders are frequently complicated by depression, eating disorders, or substance abuse. Many people have more than one anxiety disorder. Panic Disorder Panic disorder affects about 1.7 percent of the U.S. adult population ages 18 to 54, or 2.4 million people, in a given year. Panic disorder typically strikes in young adulthood. Roughly half of all people who have panic disorder develop the condition before age 24.
Women are twice as likely as men to develop panic disorder.
People with panic disorder may also suffer from depression and substance abuse. About 30 percent of people with panic disorder abuse alcohol and 17 percent abuse drugs such as cocaine and marijuana. About 2.3 percent of the U.S. adult population ages 18 to 54, approximately 3.3 million Americans, has OCD in a given year. OCD affects men and women with equal frequency. In the United States, about 3.6 per-cent of adults ages 18 to 54, or 5.2 million people, have PTSD during the course of a given year.