Incidence of juvenile idiopathic arthritis in Finland, 2000–2020
Authors' conclusion
The incidence of JIA is not only very high with respect to that in other parts of the world but also higher than previously reported in Finland. The incidence varied by region and year but was not higher at the end than the beginning of the study period.
Study context
- Population
- Children <16 years meeting ILAR classification criteria for JIA, Finland, 2000–2020
- Outcome
- Annual incidence of JIA
Methodological detailsnationwide, multiple national registers
- Nationwide
- Multiple national registers
Main finding
As reported in the abstract
Incidence of JIA (Care Register) · 2000-2020
Incidence per 100 000
31.7
95% CI 30.2, 33.1
Further findings
Incidence across registers
- No considerable differences in incidence rates among registers
Incidence by sex and age
- Incidence in girls predominant vs boys in all age groups
- Incidence in girls peaked at ages 2 years and 14-15 years
- Decreasing incidence among boys 0-3 years old during entire study period
- Increasing incidence among teenage girls and boys 4-7 years old in 2000-2013
Original publication
Incidence of juvenile idiopathic arthritis in Finland, 2000–2020. Rheumatology (Oxford). Published 10 June 2024. doi:10.
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