Results from mixed effect models with random intercept.

*The differences are mean scores for the Health anxiety groups minus the mean score for the well-defined medical condition group. **All estimates concerning one outcome are based on two mixed effect models with random intercept and linear adjustment for gender, age at baseline, comorbid major depressive or anxiety disorder or medical condition, and intervention. Results stated as change in mean score within diagnosis groups from index to later time points and differences in mean scores between diagnosis groups both at index and at later time points.