Table 1.

Attrition table for model development

	Inclusion/exclusion criteria	Population and encounters
1.	VARA registry patients April 1, 2015	2161 Veterans, 25,464 Encounters
2.	At least one valid DAS28	2063 Veterans, 19,064 Encounters
3.	Study period of interest (Jan 1, 2006 to Dec 31, 2014)	2002 Veterans, 17,000 Encounters
4.	Meet 365 days of enrollment criteria with ≥2 visits during baseline period	1976 Veterans with index date
5.	Remove patients with cancer	1631 Veterans
6.	Remove patients with transplant	1631 Veterans
7.	No other autoimmune disorders	1582 Veterans

VARA Veterans Affairs Rheumatoid Arthritis, Das28 28-joint disease activity score