Table 1.

Study population characteristics.

	Control pregnancies (n = 32)	Patient pregnancies (n = 253)
Age at delivery in years, mean (SD)	32.1 (4.4)	32.8 (3.7)
Duration of pregnancy in weeks, mean (SD)	40.1 (1.4)	39.2 (1.9)
Disease duration at first visit in years, mean (SD)	–	7.7 (6.3)
ACPA-positive patients, n (%)	–	153/253 (60.5)
RF-positive patients, n (%)	–	161/240 (67.1)
Erosive disease, n (%)	–	149/229 (65.1)
Response during pregnancy, n (%)	–	72/137 (52.6)
Flare during postpartum period, n (%)	–	72/232 (31.0)
Disease activity score [DAS28(3)-CRP] at first trimester of pregnancy, mean (SD)	–	3.6 (1.1)