Table 2.

Average Annual Percent Change in Age‐Standardized Rates of Adverse Pregnancy Outcomes Per 1000 Live Births in Women Aged 15 to 44 Years in the United States, 2007 to 2019

APO subtypes	Average annual percent change (95% CI)
	2007–2019	2007–2014	2014–2019
Hypertensive disorders of pregnancy	6.2 (5.7 to 6.6)*	4.1 (3.6 to 4.7)*	9.1 (8.1 to10.1)*
Preterm delivery	−0.2 (−0.4 to 0.0)*	−1.2 (−1.5 to −1.0)*	1.3 (1.0 to 1.7)*
Low birth weight	0.2 (−0.1 to 0.5)	−0.3 (−0.4 to −0.1)*	0.9 (0.2 to 1.6)*

APO indicates adverse pregnancy outcome.

^*Indicates that the average annual percent change is significantly different from 0 at the α=0.05 level.