Erratum to: Rheumatol Int (2013) 33:2255–2260 DOI 10.1007/s00296-013-2709-0

The authors noticed a discrepancy between the text and table in terms of patient number according to the gender in the published article. The patient numbers in Table 1 and statistics were true. However, the patient numbers in the second sentence of the ‘Results’ section were incorrect. The correct sentence should read as follows:

Of the subjects, 127 (56.7 %) were females.