What question did this study set out to answer?

Estimate the incidence and prevalence of rheumatoid arthritis in New Zealand and compare mortality rates with the general population.

Incidence, prevalence and mortality of rheumatoid arthritis in general practice in New Zealand

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Estimates rheumatoid arthritis incidence and prevalence in New Zealand, revealing significant gender and ethnic disparities.

Estimate the incidence and prevalence of rheumatoid arthritis in New Zealand and compare mortality rates with the general population.
Identified patients with rheumatoid arthritis using SNOMED CT codes from Pinnacle dataset for 2018-2025.
Calculated age-standardised rates of incidence and prevalence by ethnicity and gender.
Estimated standardised mortality ratio to compare observed deaths in RA patients with expected deaths in the general population.
Identified 3831 rheumatoid arthritis patients during the study period.
Age-standardised incidence of RA was 26.9 per 100,000 population, with women having 34.8 and men 18.2 per 100,000.
Age-standardised prevalence reached 417.5 per 100,000, with women at 583.0 and men at 237.6 per 100,000.

Lao et al. (2026) studied this question.

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