Table 2 Mean values for %CD4⁺FOXP3⁺ and 95% CI for the “non-oligarticular” group (comprising systemic, polyarticular RF⁺ and RF^–, and extended oligoarticular ILAR categories), the persistent oligoarticular group and a healthy control group

	n	%CD4⁺FOXP3⁺ (mean)	95% CI
Non-oligoarticular*	27	6.48	5.54 to 7.43
Systemic†	4	4.79	2.31 to 7.27
Polyarticular RF⁺	7	7.32	5.44 to 9.20
Polyarticular RF^–	10	6.57	5.00 to 8.14
Extended oligoarticular	6	6.49	4.45 to 8.51
Persistent oligoarticular*†	22	8.19	7.00 to 9.39
Healthy controls	33	6.91	6.05 to 7.78

*When individual ILAR subtypes were compared there was a significant difference between the systemic and persistent oligoarticular ILAR subtypes (p = 0.031); Games–Howell post hoc test analysis (which accounts for the differing group sizes).
†Regulatory T cells (T_Reg ) were significantly higher in the persistent oligoarticular group when compared with the non-oligoarticular group (p = 0.044) but not healthy controls (p = 0.720).
ILAR, International League of Associations for Rheumatology; RF, rheumatoid factor.