Final answer:
The exact percentage of individuals with illness anxiety disorder diagnosed solely with this disorder is not specified in the provided details. Anxiety disorders are very common in the United States, with notable percentages of the adult population affected annually or across a lifetime.
Step-by-step explanation:
The percentage of individuals with illness anxiety disorder diagnosed with this disorder alone has several potential answers, but based on the question, no specific data is provided to determine the exact percentage from options a) 10-20%, b) 30-40%, c) 50-60%, or d) 70-80%. It is necessary to refer to peer-reviewed studies or officially published statistics to answer this question correctly.
Anxiety disorders are the most common mental disorders in the United States, with a significant percentage of U.S. adults likely to be affected in a single year or over the course of a lifetime, according to the Anxiety and Depression Institute of America (2021). Illness anxiety disorder, formerly known as hypochondriasis, is when individuals excessively worry about having a serious undiagnosed illness despite having few or no symptoms.
The text provides various examples of disease rates and mental health statistics. Such as the statement that about 18 percent of U.S. adults are likely to be affected by an anxiety disorder in a single year, and 28 percent over their lifetime. These are critical figures to consider when reviewing the prevalence of anxiety-related conditions, including illness anxiety disorder.