Open Access

Erratum To: The PTPN221858C/T polymorphism is associated with anti-cyclic citrullinated peptide antibody-positive early rheumatoid arthritis in northern Sweden

  • Heidi Kokkonen1,
  • Martin Johansson1,
  • Lena Innala1,
  • Erik Jidell2 and
  • Solbritt Rantapää-Dahlqvist1Email author
Arthritis Research & Therapy20079:403

DOI: 10.1186/ar2312

Published: 25 October 2007

The Research article to this article has been published in Arthritis Research & Therapy 2007 9:R56

After publication of our recent article [1], we noticed an error in Table 6 'Relative risk for developing rheumatoid arthritis in patients, stratified for anti-cyclic citrullinated peptide (anti-CCP) antibodies'.

Under the heading of 'Anti-CCP antibody-positive', the first line should read 'HLA-shared epitope-negative', and the second line should read 'HLA-shared epitope-positive'. Similarly, under the heading 'Anti-CCP antibody-negative', the first line should read 'HLA-shared epitope-negative' and the second line should read 'HLA-shared epitope-positive'.

The correct table is given here as Table 1 (a corrected version of Table 6 [1]).
Table 1

Relative risk for developing rheumatoid arthritis in patients, stratified for anti-cyclic citrullinated peptide (anti-CCP) antibodies

 

Nonsmoking

Smoking

 

Cases/controls

Relative risk (95% confidence interval)

Cases/controls

Relative risk (confidence interval)

Anti-CCP antibody-positive

    

   HLA-shared epitope-negative

33/41

1.00

71/49

1.67 (0.95–2.94)

   HLA-shared epitope-positive

62/33

2.05 (1.12–3.75)

143/21

7.61 (4.05–14.30)

Anti-CCP antibody-negative

    

   HLA-shared epitope-negative

40/41

1.00

52/49

1.11 (0.63–1.95)

   HLA-shared epitope-positive

23/33

0.71 (0.37–1.38)

31/21

1.92 (0.98–3.77)

The combination of carriage of HLA-shared epitope alleles or not, and ever or never smoking were compared for groups stratified for anti-CCP antibodies.

Notes

Authors’ Affiliations

(1)
Department of Rheumatology, University Hospital
(2)
Department of Transfusion Medicine, University Hospital

References

  1. Kokkonen H, Johansson M, Innala L, Jidell E, Rantapää-Dahlqvist S: The PTPN22 1858C/T polymorphism is associated with anti-cyclic citrullinated peptide antibody-positive early rheumatoid arthritis in northern Sweden. Arthritis Res Ther. 2007, 9: R56-10.1186/ar2214.PubMed CentralView ArticlePubMed

Copyright

© BioMed Central Ltd 2007

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