Table 1.

Baseline CORRONA visit comparisons of RA and PsA patients that were included in the study with patients not included in the study^*

	RA			PsA
	Excluded	Analytic Sample	P- value	Excluded	Analytic Sample	P-value
	N=6873	N=19260		N=1246	N=2970
Age, years	59.6 (14.3)	57.6 (13.5)	<0.001	52.2 (13.8)	51.1 (12.5)	0.03
Female	5119 (75.3)	14676 (76.7)	0.020	671 (54.3)	1524 (51.6)	0.12
Caucasian	5520 (81.7)	15866 (83.5)	<0.001	1097 (89.0)	2698 (91.6)	0.006
Disease duration, years	9.0 (9.9)	9.4 (9.6)	0.01	7.7 (9.1)	8.4 (8.6)	0.02
CRP, mg/l	3.5 (9.5)	3.0 (8.5)	0.005	3.0 (9.5)	2.3 (6.9)	0.13
CDAI (0,76)	14.4 (13.9)	13.5 (12.6)	<0.001	11.6 (10.9)	10.3 (10.3)	<0.001
DMARD history	7072 (86.8)	17532 (91.0)	<0.001	1183 (81.1)	2629 (88.5)	<0.001
MTX history	4924 (71.6)	14754 (76.6)	<0.001	1016 (81.5)	2018 (89.2)	<0.001
anti-TNF history	2791 (40.6)	8766 (45.5)	<0.001	653 (52.4)	1696 (57.1)	0.005

^*Dichotomous variables are expressed as number (%); continuous variables are expressed as mean (SD)