METHODS: Data for this explorative analysis derive from a longitudinal study of RESULTS: At follow-up, the inclusion of e-mental health interventions in treatment was increased to 40 % compared to baseline (28.4 %). Also, more participants reported having better knowledge and having received information about e-mental health. Gender, age, and knowledge about e-mental health interventions were significantly associated with usage patterns. In the regression analysis, gender, age, and professional group were relevant predictors of use at follow-up. CONCLUSION: Our results show that increasingly health care providers are including e-mental health interventions in treatment. This is presumably related to better knowledge. However, it is clear that e-mental health interventions are not yet an established component of health care. Rather, implementation efforts, particularly the dissemination of informational materials, are required to promote the use.