A 2007 study from researchers at the American College of Chest Physicians compared hypnosis to nicotine replacement therapy. Fifty percent of patients who were treated in the hypnotherapy group were still quit at 26 weeks compared to just 15.78 percent in the nicotine replacement group. Patients who underwent NRT and hypnotherapy also experienced a 50-percent success rate at 26 weeks.
Even though you appear to be in a trance during hypnosis, you are not unconscious. You are still aware of your surroundings, and -- despite what many stage performers may claim during an entertaining show -- you cannot be made do to anything against your will. In fact, brain tests performed on patients during hypnotism sessions have shown a high level of neurological activity.
In a study by Diane E. Lewis, respondents identified a variety of reasons for hiring executive coaches.  The reasons cited below encompass both problem solving and developmental emphases. They could also be described as change-oriented, with an emphasis on supplementing and refocusing the participant’s skills, or growth-oriented, with an emphasis on accelerating the learning curve for high-potential or recently promoted executives. The percentage of respondents citing that particular reason is in parenthesis:
The book gives examples of induction methods, including what is now called the classic "Dave Elman Induction", as well as the use of hypnosis in dozens of physical and mental conditions. Since these uses are reserved today only for licensed professionals, and since licensed professionals usually shy away from or shun anything that is not considered mainstream, hypnosis is most often used today for behavior modification issues, such as weight loss or smoking cessation.
Hypnosis is not a psychotherapeutic treatment or a form of psychotherapy, but rather a tool or procedure that helps facilitate various types of therapies and medical or psychological treatments. Only trained health care providers certified in clinical hypnosis can decide, with their patient, if hypnosis should be used along with other treatments. As with psychotherapy, the length of hypnosis treatment varies, depending on the complexity of the problem.