Table 2.

Incidence Rates (Per 100 000 Person‐Years) of Stroke in Antepartum, Peripartum, Postpartum, and Nonpregnant Time (n=2 046 048)

All Strokes	Stroke Cases, n	Person‐Years	Rate (Per 100 000 Person‐Years)	95% CI	Adjusted Rate Ratioa	95% CI
Nonpregnant timeb	2440	9 759 438	25.0	24.0–26.0	Reference
Antepartum	33	308 378	10.7	7.6–15.1	0.6	0.5–0.9
First trimester	8	94 973	8.4	4.2–16.8	0.5	0.3–1.0
Second trimester	13	119 521	10.9	6.3–18.7	0.7	0.4–1.1
Third trimester	12	93 884	12.8	7.3–22.0	0.8	0.4–1.3
Peripartum	8	4967	161.1	80.6–322.1	9.4	4.7–18.8
Postpartum	30	98 191	30.6	21.4–43.7	1.8	1.2–2.5
Early postpartum	23	48 796	47.1	31.3–70.9	2.7	1.8–4.1
Late postpartum	7	49 395	14.2	6.8–29.7	0.8	0.4–1.7

^aRate ratio adjusted for maternal age, socioeconomic deprivation, and calendar time.

^bExcluding the first 12 weeks postpartum.