A Tailored, Therapist-Guided Internet-Based Cognitive Behavioral Intervention as an Addition to Care as Usual for Patients With Rheumatoid Arthritis: Economic Evaluation alongside an RCT (Preprint)
BACKGROUND A chronic somatic condition, such as rheumatoid arthritis (RA), can significantly reduce health related quality of life due to psychological, social and physical consequences. Cognitive behavioural therapy can aid in improving outcomes for patients, for example in terms of disease trajectory, health care utilization, and workplace disability of patients. In recent years internet-based cognitive behavioural therapy has been proposed as an effective and efficient way to offer cognitive behavioural therapy and further implementation. However, little research has been conducted to support this proposition. OBJECTIVE To stimulate the implementation of effective treatment strategies for improving health-related quality of life (HRQoL) of patients with rheumatoid arthritis (RA), cost-benefit ratios are required to inform stake-holders. A cost-effectiveness study from a societal perspective was conducted alongside a randomized controlled trial on a tailored and therapist-guided internet-based cognitive behavioural intervention (ICBT) for patients with elevated levels of distress, as an addition to usual care alone. METHODS Data were collected at baseline/pre-intervention, 6 months/post-intervention, and three-monthly thereafter during one year follow-up. Effects were measured in quality-adjusted life years (QALYs) and costs from a societal perspective including healthcare sector costs (including healthcare use, medication, and intervention costs), patient travel costs for healthcare use, and costs associated with loss of labor. RESULTS The intervention improved quality of life compared to usual care alone (Δ QALYs= 0.059), but also led to higher costs (Δ= € 4.211,44), which reduced substantially when medication costs were left out of the equation (Δ= € 1.862,72). Most (93%) of the simulated ICERS were in the north-east quadrant, suggesting a high probability that the intervention is effective in improving HRQoL, but at a greater monetary cost for society compared to usual care alone. CONCLUSIONS A tailored and guided ICBT intervention as an addition to usual care for patients with RA with heightened distress was effective in gaining quality of life. Consequently, implementation of the ICBT into standard healthcare for patients with RA is recommended, yet further study into cost reductions in this population is warranted. CLINICALTRIAL National trial registry number:NTR2100