Table 2.

Additional Information Related to medical RA- or ReA-associated medical encounters.

	N (%) with RA/ReA-associated medical encounters		Median (IQR) Visits Per Subject
	RA	ReA	RA	ReA
Arthrocentesis	153 (30.6)	174 (34.8)	1.0 (1.0, 3.0)	1.0 (1.0, 3.0)
Magnetic Resonance Imaging (MRI)	187 (37.4)	112 (22.4)	2.0 (1.0, 3.0)	1.0 (1.0, 2.0)
Mitochondrial Antibody	10 (2.0)	4 (0.8)	1.0 (1.0, 1.0)	1.0 (1.0, 1.0)
Actin Smooth Muscle Antibody	14 (2.8)	1 (0.2)	1.0 (1.0, 1.0)	1.0 (1.0, 1.0)
Anti-nuclear Antibody	24 (4.8)	6 (1.2)	1.0 (1.0, 1.0)	1.0 (1.0, 1.0)
Extractable Nuclear Antigen Antibody	23 (4.6)	5 (1.0)	1.0 (1.0, 1.0)	1.0 (1.0, 1.0)
Rheumatoid Factor	33 (6.6)	4 (0.8)	1.0 (1.0, 1.0)	1.0 (1.0, 1.0)
Rheumatology Clinic	179 (35.8)	255 (51.0)	6.0 (2.0, 12.0)	3.0 (2.0, 5.0)