Table 1.

Maternal Characteristics and Pregnancy Outcome in the Study Subcohort With Urinary Catecholamines Measured at Midpregnancy (n = 1,007) and in the Entire Subcohort, Pregnancy Outcomes and Community Health Study, 1998–2004

Maternal Characteristics	Study Sample (n = 1,007)		Entire Subcohort (n = 1,371),
	No.	%	%
Maternal age, years
<20	178	18	18
20–29	563	56	56
≥30	266	26	26
Race/ethnicitya
White	543	54	51
African American	391	39	42
Others	73	7	7
Maternal education, years
<12	218	22	23
12	285	28	29
>12	504	50	48
Medicaid insured
No	450	45	43
Yes	557	55	57
Week of pregnancy at enrollment
<20	159	16	16
20–24	584	58	71
25–27	264	26	13
Parity/preterm delivery history
No previous livebirth	424	42	42
Previous livebirth without preterm delivery	534	53	53
Previous livebirth with preterm delivery	49	5	5
Pregnancy outcomea
Term	760	75	75
Preterm medically indicated	75	7	8
Preterm PROM	67	8	7
Preterm spontaneous preterm labor	105	10	10

Abbreviation: PROM, premature rupture of membranes.

^aPercentages reflect oversampling of African Americans and preterm into the subcohort.