Migraine-Asthma Comorbidity and Risk of Hypertensive Disorders of Pregnancy

Table 1

Sociodemographic and other characteristics of the cohort, Seattle and Tacoma, WA, USA, 1996–2008.

	Entire Cohort	Physician-Diagnosed Migraine
Characteristics	(𝑁=3,731)	Yes (𝑁=670)	No (𝑁=3,061)	𝑃 Value
	%	%	%
Maternal age (years)	32.6±4.5^∗	32.5±4.6	32.7±4.5	0.27
<20	0.6	0.5	0.6
20–29	22.2	25.8	21.4
30–34	43.6	40.6	44.3	0.14
35–39	27.0	26.3	27.1
≥40	6.6	6.9	6.5
Maternal race/ethnicity
Non-Hispanic white	86.4	88.7	85.9
African American	1.9	1.8	1.9	0.15
Other	11.7	9.5	12.2
Annual household income ($)
<30,000	3.4	3.0	3.5
30,000–69,999	19.8	20.8	19.6	0.79
≥70,000	73.4	72.7	73.6
Missing	3.3	3.6	3.3
Nulliparous	62.5	58.2	63.4	0.01
Education ≤ high school	4.1	4.6	3.9	0.40
Unmarried	9.0	10.5	8.7	0.14
History of diabetes mellitus	1.3	1.3	1.3	0.89
History of chronic hypertension	4.7	8.2	4.0	<0.001
Family history of diabetes mellitus	14.7	16.4	14.4	0.18
Family history of hypertension	50.0	53.1	49.3	0.07
Not employed during pregnancy	18.6	17.6	18.8	0.49
Smoked during pregnancy	5.8	6.1	5.7	0.71
No prenatal vitamin use	2.7	2.8	2.7	0.78
No exercise during pregnancy	13.1	12.5	13.2	0.66
Pre-pregnancy body mass index (kg/m^2)	23.6±5.0^∗	24.5±6.1	23.4±4.7	<0.001
<18.5	4.3	3.9	4.3
18.5–24.9	70.3	67.0	71.0	0.003
25–29.9	16.4	16.4	16.4
≥30	9.0	12.7	8.2
Multiple births	3.2	2.5	3.3	0.29
Gestational age at delivery (weeks)	38.4±3.5^∗	38.3±3.4	38.4±3.5	0.54
Infant birth weight (gram)	3408±604^∗	3406±589	3409±608	0.90

^*Mean ± standard deviation (SD).