Emery P, Genovese MC, van Vollenhoven R, Sharp JT, Patra K, Sasso EH. Less radiographic progression with adalimumab plus methotrexate versus methotrexate monotherapy across the spectrum of clinical response in early rheumatoid arthritis. J Rheumatol 2009;36:1429–41; doi:10.3899/jrheum.081018. In the first column of page 1432, under the heading “Mean ΔTSS and frequency of radiographic progression by level of ACR response,” the first sentence of the section should read: “The mean ΔTSS values were significantly greater for MTX monotherapy than adalimumab plus MTX for each level of ACR response at Week 26 (except ACR70; Figure 2A) and Week 104 (Figure 2B).” We regret the error.