Table 1

 Demographic and clinical characteristics of participating subjects

VariableSubjects (n = 12)
*ESR values were 51 and 52 mm/h.
†RF titres were 25 and 44 IU/ml (normal <20 IU/ml).
ESR, erythrocyte sedimentation rate.
Mean age (mean (SD))37 (9)
Sex (M:F)5:7
Race (white:black)5:7
Retropatellar crepitus on physical examination5/12
Raised C reactive protein0/12
Raised ESR2/12*
Positive rheumatoid factor2/12†
Positive antinuclear antibody0/12