Table 4.

Adjusted Odds Ratios^a for the Joint Effect of Fetal Growth and Gestational Age at Birth (1973–1979) With Respect to Antihypertensive Medications (≥1 Prescriptions/Year) in Young Adulthood (Ages 25.5–37.0 Years), Sweden^b

Fetal Growth, SDc	Gestational Age at Birth
	23–27 Weeks (n = 174)		28–32 Weeks (n = 3,167)		33–34 Weeks (n = 5,685)		35–36 Weeks (n = 19,194)		37–42 Weeks (n = 589,573)		≥43 Weeks (n = 18,759)
	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI
<−2 (n = 19,199)	NE		3.34	1.95, 5.74	1.93	1.11, 3.35	1.51	0.99, 2.28	1.47	1.31, 1.65	1.68	1.26, 2.24
−2 to <−1 (n = 88,370)	NE		1.92	1.12, 3.27	1.30	0.80, 2.10	1.72	1.33, 2.22	1.29	1.20, 1.37	1.25	1.02, 1.52
−1 to <0 (n = 210,831)	5.50	1.70, 17.8	1.06	0.62, 1.80	1.20	0.82, 1.76	1.37	1.12, 1.68	1.08	1.03, 1.14	1.06	0.87, 1.30
0 to <1 (n = 203,170)	2.76	0.67, 11.4	1.61	0.98, 2.65	1.47	1.01, 2.13	1.22	0.99, 1.51	1.00	Reference	0.78	0.57, 1.09
1 to <2 (n = 88,377)	2.72	0.36, 20.2	1.15	0.51, 2.59	1.33	0.78, 2.27	1.23	0.93, 1.62	0.99	0.92, 1.06	0.87	0.45, 1.68
≥2 (n = 26,605)	NE		2.82	1.44, 5.52	1.49	0.79, 2.79	1.36	0.95, 1.93	1.01	0.90, 1.14	1.69	0.54, 5.35

Abbreviations: CI, confidence interval; NE, not estimable; OR, odds ratio; SD, standard deviation.

^aAdjusted for infant's date of birth, infant's gender, maternal marital status, maternal education, family income, and maternal prescription of antihypertensive medications (≥1 prescriptions/year) during the follow-up period (July 1, 2005, through December 31, 2009).

^bP_interaction = 0.82.

^cNumber of standard deviations from the mean reference birth weight for gestational age and sex.