A patient-initiated DMARD self-monitoring service for people with rheumatoid or psoriatic arthritis: a cost-effectiveness analysis

OBJECTIVE: To determine whether a patient-initiated DMARD self-monitoring service for people on MTX is a cost-effective model of care for patients with RA or PsA. METHODS: An economic evaluation was undertaken alongside a randomized controlled trial involving 100 patients. Outcome measures were quality of life and ESR assessed at baseline and post-intervention. Costs were calculated for healthcare usage using a United Kingdom National Health Service economic perspective. Sensitivity analysis was performed to explore the impact of nurse-led telephone helplines. Uncertainty around the cost-effectiveness ratios was estimated by bootstrapping and analysing the cost-effectiveness planes. RESULTS: Fifty-two patients received the intervention and 48 usual care. The difference in mean cost per case indicated that the intervention was £263 more expensive (P < 0.001; 95% CI: £149.14, £375.86) when the helpline costs were accounted for and £94 cheaper (P = 0.08; 95% CI: -£199.26, £10.41) when these costs were absorbed by the usual service. There were, however, statistically significant savings for the patient (P = 0.02; 95% CI: -£28.98, £3.00). When costs and effectiveness measures of ESR and quality of life measured, using the Short Form-12v1, were combined this did not show the patient-initiated service to be cost-effective at a statistically significant level. CONCLUSION: This patient-initiated service led to reductions in primary and secondary healthcare services that translated into reduced costs, in comparison with usual care, but were not cost-effective. Further work is needed to establish how nurse-led telephone triage services are integrated into rheumatology services and the associated costs of setting up and delivering them. TRIAL REGISTRATION: ClinicalTrials.gov, http://clinicaltrials.gov, ISRCTN21613721