Table 8.

Association between DHE exposure before or during pregnancy and the risk of LBW by categories of DHE exposure.

Characteristics	LBW < 2500 g at birth
	Yes n = 11,875	No n = 222,025	Crude RR (95% CI)	Adjusted RR (95% CI)
	n (%)
Study medication exposure during pregnancy
DHEa prior to pregnancy only	7 (0.06)	84 (0.04)	1.45 (0.71–2.96)	1.41 (0.73–2.72)
DHE prior and during pregnancy	8 (0.07)	70 (0.03)	2.30 (0.76–6.96)	2.21 (0.81–6.03)
DHE during pregnancy only	5 (0.04)	73 (0.03)	1.33 (0.66–2.68)	1.25 (0.68–2.30)

Adjusted for all variables included in Table 3.

^aDihydroergotamine.