Table 6.

Child characteristics by cohort

	TNF-α inhibitor (n = 419/407)*	Comparison (n = 1383/1324)
Gestational week (GW) at birth, n	403/391	1373/1314
GW, including twins median (IQR)	38.71 (37.4–40)	39.43 (38.3–40.3)
GW, excluding twins median (IQR)	38.86 (37.6–40)	39.57 (38.4–40.4)
Preterm birth (<37 weeks), n	403/391	1373/1314
Preterm, including twins n (%)	71 (17.6)	123 (9.0)
Preterm, excluding twins n (%)	63 (16.1)	93 (7.1)
Infant’s weight, n	409/399	1357/1299
Weight in g, including twins median (IQR)	3125 (2745–3450)	3350 (3020–3660)
Weight in g, excluding twins median (IQR)	3130 (2797.5–3460)	3374 (3080–3680)
Infants with LBW (excluding twins) n (%)	51 (12.8)	14 (1.1)

LBW low birth weight (<2500 g) according to the WHO definition (http://www.who.int/maternal_child_adolescent/documents/9789241548366.pdf). IQR, interquartile range.

^*numbers with and without twins