. Author manuscript; available in PMC: 2018 Apr 1.

Published in final edited form as: Pediatr Obes. 2016 Mar 7;12(2):129–136. doi: 10.1111/ijpo.12119

Table 2.

Associations of prenatal oral antibiotic prescriptions, by trimester, with birth weight-for-gestational age z-scores, among 2128 mother-infant pairs in Project Viva

	N (%)	Unadjusted β (95% CI)	Adjusted β (95% CI)
Any during pregnancy (yes vs. no)	643 (30.2)	−0.09 (−0.18, 0.00)	−0.10 (−0.19, 0.00)
1^st trimester^*	304 (14.3)	−0.15 (−0.27,−0.03)	−0.08 (−0.20, 0.04)
2^nd trimester^**	212 (11.6)	−0.17 (−0.31,−0.04)	−0.20 (−0.35, −0.06)
3^rd trimester^***	127 (7.9)	0.18 (0.00, 0.35)	0.08 (−0.10, 0.25)

Adjusted for maternal age, pre-pregnancy BMI, parity, race/ethnicity, education, smoking habits, and household income, and child sex and gestation length.

Among 2128 women

^**

Among 1824 women who were not prescribed antibiotics in the 1^st trimester

^***

Among 1612 women who were not prescribed antibiotics in the 1^st or 2^nd trimester

CI, confidence interval; BMI, body mass index