Table 2

Shared epitope frequencies in patients with young onset RA (YORA), elderly onset RA (EORA), and in controls

		YORA (n=262)				EORA (n=60)		Controls (n=1609) No %
		No (%)	OR^2-150 (95% CI)			No (%)	OR^2-150 (95% CI)	Controls (n=1609) No %
SE^2-150 homozygotes	17 (6)	13.9 (5.9 to 32.5)		2 (3)^2-151	6.9 (1.4 to 33.2)	8 (0.5)
SE heterozygotes	39 (15)	4.4 (2.9 to 6.8)		5 (8)^2-151	2.3 (0.9 to 5.9)	61 (3.8)
SE/DRx	139 (53)	2.0 (1.5 to 2.6)		36 (60)^2-151	2.7 (1.5 to 4.5)	576 (35.8)
DRx/DRx^2-152	67 (26)	0.2 (0.1 to 0.3)		17 (28)^2-151	0.3 (0.1 to 0.5)	964 (59.9)

↵2-150 OR (95% CI) = odds ratio (95% confidence interval) versus controls; SE = shared epitope.
↵2-151 EORA versus YORA: NS.
↵2-152 DRx = any DR gene but RA associated alleles.