TABLE 5.

Associations^* of frequency of total seafood intake with birth weight, fetal growth, and length of gestation: data from pregnant women from Massachusetts enrolled in Project Viva, 1999–2002

Frequency of total seafood intake†	Δ Birth weight		Δ Fetal growth		Δ Length of gestation
	Grams	95% CI‡	z value	95% CI	Days	95% CI
First trimester (n = 1,797)
No intake (n = 233)	70	−18, 158	0.13	−0.01, 0.28	−0.8	−2.7, 1.1
Tertile 1 (n = 597)	48	−21, 117	0.08	−0.03, 0.20	0.2	−1.3, 1.7
Tertile 2 (n = 568)	7	−62, 77	−0.01	−0.12, 0.10	−0.4	−2.0, 1.1
Tertile 3 (n = 399)
p§ for trend	0.05		0.02		0.99
Second trimester (n = 1,663)
No intake (n = 215)	21	−64, 105	0.09	−0.06, 0.24	0.5	−1.3, 2.3
Tertile 1 (n = 564)	39	−27, 105	0.06	−0.05, 0.18	0.1	−1.3, 1.4
Tertile 2 (n = 493)	−29	−96, 38	−0.05	−0.17, 0.07	−0.8	−2.2, 0.6
Tertile 3 (n = 391)
p§ for trend	0.19		0.08		0.55

^*Effect estimates were adjusted for enrollment site, infant sex, and maternal age, height, intrapartum weight gain, prepregnancy body mass index, race/ethnicity, smoking during pregnancy, education, and gravidity, all in categories as shown in table 1.

^†The lowest group reported consuming none/<1 serving of seafood per month; the remaining subjects were divided into tertiles, with the highest intake group used as the referent.

^‡CI, confidence interval.

^§Two-sided p value.