Correction: The PTPN22 1858C/T polymorphism is associated with anti-cyclic citrullinated peptide antibody-positive early rheumatoid arthritis in northern Sweden

  • Heidi Kokkonen1,

    Affiliated with

    • Martin Johansson1,

      Affiliated with

      • Lena Innala1,

        Affiliated with

        • Erik Jidell2 and

          Affiliated with

          • Solbritt Rantapää-Dahlqvist1Email author

            Affiliated with

            Arthritis Research & Therapy20079:403

            DOI: 10.1186/ar2312

            Published: 25 October 2007

            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.

            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.PubMedView Article

            Copyright

            © BioMed Central Ltd 2007

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