Table 2

Characteristics of the RA cases at diagnosis in NHS and NHSII

NHS (n=933)NHSII (n=381)
Age at diagnosis, mean (SD)58.7 (9.7)47.0 (7.1)
Seropositive* (%)59.061.2
X-ray changes (%)29.726.8
Diagnosed by ACR member (%)85.489.8
Symmetric arthritis (%)96.496.1
Nodules (%)13.412.3
  • *Rheumatoid factor positive and/or anticyclic citrullinated peptide antibody-positive.

  • ACR, American College of Rheumatology; NHS, Nurses’ Health Study; NHSII, Nurses’ Health Study II; RA, rheumatoid arthritis.