Age and Sex Specific Trends in Incidence of Juvenile Idiopathic Arthritis in Danish Birth Cohorts from 1992 to 2002: A Nationwide Register Linkage Study
Abstract
:1. Introduction
2. Materials and Methods
2.1. Data Sources and Variables
2.2. Source Population
2.3. Incident JIA
2.4. Statistical Analysis
2.5. Ethical Considerations
3. Results
4. Discussion
Strengths and Limitations
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Total Population Born between 1992–2002 | Population Diagnosed with JIA | ||||||||
---|---|---|---|---|---|---|---|---|---|
Year of Birth | Person-Years | Incidence Rate | Number of Cases | ||||||
Total | Boys | Girls | Total | Boys | Girls | Total | Boys | Girls | |
1992 | 1,064,050 | 546,621 | 517,429 | 24.0 (22.5–25.5) | 18.1 (16.4–20.0) | 30.1(27.8–32.7) | 255 | 99 | 156 |
1993 | 1,058,490 | 543,585 | 514,905 | 22.2 (20.8–23.7) | 18.6 (16.8–20.5) | 26.0 (23.9–28.4) | 235 | 101 | 134 |
1994 | 1,093,464 | 559,228 | 534,236 | 22.3 (20.9–23.8) | 15.0 (13.5–16.8) | 29.9 (27.7–32.4) | 244 | 84 | 160 |
1995 | 1,092,764 | 562,261 | 530,503 | 21.3 (20.0–22.8) | 15.1 (13.6–16.8) | 27.9 (25.7–30.3) | 233 | 85 | 148 |
1996 | 1,058,027 | 544,222 | 513,805 | 25.0 (23.6–26.6) | 20.2 (18.4–22.2) | 30.2 (27.8–32.7) | 265 | 110 | 155 |
1997 | 1,061,675 | 545,903 | 515,772 | 23.4 (21.9–24.9) | 18.5 (16.7–20.4) | 28.5 (26.2–31.0) | 248 | 101 | 147 |
1998 | 1,037,950 | 534,459 | 503,491 | 24.4 (22.9–26.0) | 19.1 (17.3–21.1) | 30.0 (27.6–32.5) | 253 | 102 | 151 |
1999 | 1,038,340 | 531,331 | 507,009 | 24.4 (22.9–25.9) | 18.4 (16.7–20.4) | 30.6 (28.2–33.1) | 253 | 98 | 155 |
2000 | 1,051,363 | 539,234 | 512,129 | 23.3 (21.9–24.8) | 19.8 (18.0–21.9) | 26.9 (24.7–29.3) | 245 | 107 | 138 |
2001 | 1,011,038 | 517,397 | 493,641 | 28.8 (27.1–30.5) | 21.6 (19.7–23.8) | 36.3 (33.6–39.1) | 291 | 112 | 179 |
2002 | 933,984 | 480,327 | 453,657 | 26.6 (24.9–28.3) | 20.0 (18.0–22.1) | 33.5 (30.9–36.3) | 248 | 96 | 152 |
Total | 11,501,144 | 5,904,567 | 5,596,578 | 24.1 (23.6–24.5) | 18.5 (18.0–19.1) | 29.9 (29.2–30.7) | 2770 | 1095 | 1675 |
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Cardoso, I.; Frederiksen, P.; Specht, I.O.; Händel, M.N.; Thorsteinsdottir, F.; Heitmann, B.L.; Kristensen, L.E. Age and Sex Specific Trends in Incidence of Juvenile Idiopathic Arthritis in Danish Birth Cohorts from 1992 to 2002: A Nationwide Register Linkage Study. Int. J. Environ. Res. Public Health 2021, 18, 8331. https://doi.org/10.3390/ijerph18168331
Cardoso I, Frederiksen P, Specht IO, Händel MN, Thorsteinsdottir F, Heitmann BL, Kristensen LE. Age and Sex Specific Trends in Incidence of Juvenile Idiopathic Arthritis in Danish Birth Cohorts from 1992 to 2002: A Nationwide Register Linkage Study. International Journal of Environmental Research and Public Health. 2021; 18(16):8331. https://doi.org/10.3390/ijerph18168331
Chicago/Turabian StyleCardoso, Isabel, Peder Frederiksen, Ina Olmer Specht, Mina Nicole Händel, Fanney Thorsteinsdottir, Berit Lilienthal Heitmann, and Lars Erik Kristensen. 2021. "Age and Sex Specific Trends in Incidence of Juvenile Idiopathic Arthritis in Danish Birth Cohorts from 1992 to 2002: A Nationwide Register Linkage Study" International Journal of Environmental Research and Public Health 18, no. 16: 8331. https://doi.org/10.3390/ijerph18168331