TABLE 3.

Rate Ratios (95% CI) of Maternal Pre-Pregnancy Hypertension in Rural Compared With Urban Areas in the United States Stratified by Age in 2007, 2010, 2016, and 2018

	Year
	2007	2010	2016	2018
Overall	1.32 (1.29–1.35)	1.16 (1.14–1.19)	1.17 (1.14–1.19)	1.18 (1.16–1.20)
Age 15–19 yrs	1.29 (1.15–1.44)	1.02 (0.90–1.15)	1.19 (1.05–1.35)	1.18 (1.04–1.35)
Age 20–24 yrs	1.38 (1.31–1.46)	1.17 (1.10–1.24)	1.11 (1.05–1.18)	1.16 (1.11–1.22)
Age 25–29 yrs	1.53 (1.46–1.60)	1.31 (1.25–1.37)	1.29 (1.24–1.34)	1.23 (1.18–1.27)
Age 30–34 yrs	1.61 (1.54–1.69)	1.43 (1.37–1.50)	1.49 (1.43–1.54)	1.47 (1.42–1.52)
Age 35–39 yrs	1.64 (1.55–1.73)	1.59 (1.51–1.68)	1.46 (1.39–1.53)	1.49 (1.43–1.56)
Age 40–44 yrs	1.58 (1.43–1.75)	1.42 (1.28–1.57)	1.37 (1.25–1.50)	1.51 (1.39–1.64)

CI = confidence interval.