Among individuals with disorders other than anxiety disorders or depression, but who had elevated levels of symptoms of anxiety and depression, MBT was moderately strong (effect sizes of 0.67 and 0.53, respectively), but not significantly greater than among those with relatively lower pre-treatment levels of anxiety and depression (0.53 and 0.50). These results suggest that MBT improves symptoms of anxiety and depression across a relatively wide range of severity and even when these symptoms are associated with other disorders, such as medical problems. It is possible that MBT is associated with a general reduction in stress, perhaps by encouraging patients to relate differently to their physical symptoms so that when they occur their consequences are less disturbing.
