Table 2

Distribution of clusters of clinical outcomes

Cluster I: Severe RA (n = 26)

Cluster II: Mild/moderate seropositive RA (n = 25)

Cluster 3: Mild/moderate seronegative RA (n = 39)

Treated with biologics (ever)

100%

0

0

RF positive

88.5%

100%

0

Documented erosions on radiographs (ever)

84.6%

56.4%

52.0%

HAQ after 5 years

Mean (SD)

1.17 (0.61)

0.74 (0.61)

0.88 (0.66)

Median (IQR)

1.00 (0.72-1.66)

0.63 (0.38-0.88)

0.88 (0.25-1.25)

HAQ, Health Assessment Questionnaire; IQR, interquartile range; RF, rheumatoid factor; SD, standard deviation.

Pikwer et al. Arthritis Research & Therapy 2012 14:R190   doi:10.1186/ar4021