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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

https://doi.org/10.1186/ar2312

Published: 25 October 2007

The original article was 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, Umeå, Sweden
(2)
Department of Transfusion Medicine, University Hospital, Umeå, Sweden

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 ArticlePubMedGoogle Scholar

Copyright

© BioMed Central Ltd 2007

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