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Incidence and characteristics of arthritis in Norwegian children: a population-based study.

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Title: Incidence and characteristics of arthritis in Norwegian children: a population-based study.
Authors: Riise øR (AUTHOR), Handeland KS (AUTHOR), Cvancarova M (AUTHOR), Wathne KO (AUTHOR), Nakstad B (AUTHOR), Abrahamsen TG (AUTHOR), Kirkhus E (AUTHOR), Flatø B (AUTHOR)
Source: Pediatrics. Feb2008, Vol. 121 Issue 2, pe299-306. 1p.
Abstract: OBJECTIVE: The purpose of this work was to assess the annual incidence of arthritis in children and describe early disease and patient characteristics, microbiologic features, and immunogenetic factors in children with different subgroups of childhood arthritis. PATIENTS AND METHODS: A population-based multicenter study was performed in southeastern Norway between June 1, 2004, and May 31, 2005. The total population of children under 16 years of age was 255,303. Physicians were asked to refer their patients with suspected arthritis to the local department of pediatrics or rheumatology. The children were assessed on the basis of clinical, radiologic, and laboratory examinations at inclusion and followed up at 6 weeks, 6 months, and thereafter as long as clinically indicated. A chart review was performed to identify patients with arthritis who had not been included prospectively. RESULTS: The total annual incidence of arthritis was 71 per 100,000 children. Transient arthritis, juvenile idiopathic arthritis, postinfectious arthritis, and infectious arthritis were found in 43, 14, 9, and 5 of 100,000 children, respectively. The incidence was higher in children under the age of 8 years than in older children (107 vs 34 per 100,000). Arthritis occurred more frequently in boys than in girls before the age of 8 years but not thereafter. The median age of onset was lower in children with infectious arthritis than in those with other types of arthritis. Monarthritis was less frequent in patients with juvenile idiopathic arthritis than in the other subgroups (64% vs 83%-100%). Ten percent of the patients had poststreptococcal reactive arthritis, and only 1 had enteropathic arthritis. Autoantibodies and the presence of HLA-B27 were associated with juvenile idiopathic arthritis. CONCLUSIONS: The annual incidence of childhood arthritis was 71 per 100,000 children. We found several factors that may help in differentiating between subgroups of arthritis. [ABSTRACT FROM AUTHOR]
Copyright of Pediatrics is the property of American Academy of Pediatrics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Incidence and characteristics of arthritis in Norwegian children: a population-based study.
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  Data: <searchLink fieldCode="AR" term="%22Riise+øR%22">Riise øR</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Handeland+KS%22">Handeland KS</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cvancarova+M%22">Cvancarova M</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wathne+KO%22">Wathne KO</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nakstad+B%22">Nakstad B</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Abrahamsen+TG%22">Abrahamsen TG</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kirkhus+E%22">Kirkhus E</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Flatø+B%22">Flatø B</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Pediatrics%22">Pediatrics</searchLink>. Feb2008, Vol. 121 Issue 2, pe299-306. 1p.
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: OBJECTIVE: The purpose of this work was to assess the annual incidence of arthritis in children and describe early disease and patient characteristics, microbiologic features, and immunogenetic factors in children with different subgroups of childhood arthritis. PATIENTS AND METHODS: A population-based multicenter study was performed in southeastern Norway between June 1, 2004, and May 31, 2005. The total population of children under 16 years of age was 255,303. Physicians were asked to refer their patients with suspected arthritis to the local department of pediatrics or rheumatology. The children were assessed on the basis of clinical, radiologic, and laboratory examinations at inclusion and followed up at 6 weeks, 6 months, and thereafter as long as clinically indicated. A chart review was performed to identify patients with arthritis who had not been included prospectively. RESULTS: The total annual incidence of arthritis was 71 per 100,000 children. Transient arthritis, juvenile idiopathic arthritis, postinfectious arthritis, and infectious arthritis were found in 43, 14, 9, and 5 of 100,000 children, respectively. The incidence was higher in children under the age of 8 years than in older children (107 vs 34 per 100,000). Arthritis occurred more frequently in boys than in girls before the age of 8 years but not thereafter. The median age of onset was lower in children with infectious arthritis than in those with other types of arthritis. Monarthritis was less frequent in patients with juvenile idiopathic arthritis than in the other subgroups (64% vs 83%-100%). Ten percent of the patients had poststreptococcal reactive arthritis, and only 1 had enteropathic arthritis. Autoantibodies and the presence of HLA-B27 were associated with juvenile idiopathic arthritis. CONCLUSIONS: The annual incidence of childhood arthritis was 71 per 100,000 children. We found several factors that may help in differentiating between subgroups of arthritis. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Pediatrics is the property of American Academy of Pediatrics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1542/peds.2007-0291
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              Text: Feb2008
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