Soluble Markers of Antibody Secreting Cell Function as Predictors of Infection Risk in Rheumatoid Arthritis

Table 1

Basic demographic and clinical characteristics of RA patients and RA subgroups.

	Healthy donors	RA patients without infections	RA patients with infections	value
Gender
Male/female	1/9	4/13	0/6	0.54
Ethnicity, n (%)
White/Caucasian	6	13 (76.5)	3 (50)
Non-white	4	4 (23.5)	3 (50)	0.33
Age in years
Median (IQR)	41 (26)	54 (15)	55.5 (9)	0.09
Disease duration in years
Median (IQR)		5 (6)	10.5 (11)	0.32
Age of onset
Median (IQR)		39 (25)	41.5 (20)	0.97
Autoantibody status
Seropositive/seronegative RA		14/3	4/2	0.57
Disease activity (CDAI score)
Median (IQR) [range]		2.95 (10.2) [0-37]	8.5 (4.0) [0-22]	0.34
Number of patients		16	5
RA medication category
MTX-treated/no DMARD		10/7	4/2	1.0
Methotrexate dose (mg/week)
Median (IQR)		17.5 (10)	22.5 (2.5)	0.30
Number of patients		9	3

Abbreviations: RA = rheumatoid arthritis; IQR = interquartile range; CDAI score = Clinical Disease Activity Index score.