Table 1

Characteristics of patients and control individuals

Patients

Controls


Number

17

4

Sex (female/male)

13/4

3/1

Median age (years; range)

52 (33–78)

35.5 (34–57)

Median disease duration (years; range)

8 (4–22)

-

IgM rheumatoid factor (percentage seropositive)

82%

-


Døhn et al. Arthritis Research & Therapy 2006 8:R110   doi:10.1186/ar1995

Open Data