Time to start disease modifying drugs for adults with seropositive rheumatoid arthritis: results of the first year of the national New Zealand Rheumatology Association (NZRA) audit.

AIM: This audit describes variation in the time from referral to starting disease modifying drug (DMARD) for people with newly diagnosed seropositive rheumatoid arthritis (RA), how frequently this was within the recommended 6 weeks and whether regional, service-level or patient-level factors were associated with this variation.

METHOD: Rheumatologists submitted data on new patients with a new diagnosis of rheumatoid factor and/or cyclic-citrullinated peptide antibody positive RA. The association between visit funding, ethnicity, socio-economic deprivation, rurality, local specialist staffing levels and the time to DMARD treatment was assessed using Cox proportional-hazard models.

RESULTS

Data were collected on 355 patients over 12 months. Overall, 64.8% of patients commenced DMARD treatment within 6 weeks of referral and this was associated with rheumatologist FTE per 100,000 population (adjusted HR 2.47, 95%CI 1.27-4.81; p=0.008) and the rurality (Geographic Classification of Health [GCH]) of the patient (for R2 compared to U1 adjusted HR 0.20, 95%CI 0.09-0.43; p<0.001). There was no association between time to DMARD and ethnicity or socio-economic deprivation.

CONCLUSION

There was significant variation in time to DMARD treatment, mainly related to variation in rheumatologist staffing levels and patient rurality. Rheumatologist staffing levels of 1.0 FTE/100,000 population was associated with 80% of patients meeting the recommended 6-week time to DMARD treatment.