. Author manuscript; available in PMC: 2021 Jul 1.

Published in final edited form as: Am J Obstet Gynecol. 2020 Jan 23;223(1):121.e1–121.e8. doi: 10.1016/j.ajog.2020.01.042

Table 3:

Multivariable analysis of maternal outcomes by Healthy Eating Index quartile

	HEI Q1 aRR (95% CI)	HEI Q2 aRR (95% CI)	HEI Q3 aRR (95% CI)	HEI Q4
Gestational diabetes mellitus	1.20 (0.86–1.65)	1.11 (0.82–1.49)	1.01 (0.75–1.36)	Ref
Cesarean delivery	1.20 (1.07–1.34)	1.11 (1.00–1.23)	1.07 (0.96–1.18)	Ref
Major perineal laceration	0.68 (0.47–0.98)	0.97 (0.73–1.28)	0.97 (0.75–1.26)	Ref
Postpartum hemorrhage requiring transfusion	3.33 (1.47–7.52)	2.07 (0.94–4.52)	1.59 (0.71–3.58)	Ref
Hypertensive disorder of pregnancy	1.16 (1.02–1.31)	1.11 (0.98–1.25)	1.05 (0.94–1.19)	Ref

Data displayed as adjusted relative risk (95% confidence interval), estimated through a Poisson regression model.

HEI, Healthy Eating Index; quartile 4 represents the best quality of periconceptional diet and is the referent.

Adjusted for age, body mass index, tobacco use, chronic hypertension, pregestational diabetes mellitus, and mental health disorder.