Table I.
n | % | |
---|---|---|
Study site | ||
Raleigh | 1088 | 45.2 |
Memphis | 897 | 37.3 |
Galveston | 422 | 17.5 |
Maternal age | ||
<25 years old | 725 | 30.1 |
25–29 years old | 746 | 31.0 |
30–34 years old | 654 | 27.2 |
≥35 years old | 282 | 11.7 |
Race/ethnicity | ||
Non-Hispanic White | 1346 | 56.0 |
Non-Hispanic Black | 762 | 31.7 |
Hispanic | 208 | 8.7 |
Asian/Other | 89 | 3.6 |
Education | ||
<12 years | 712 | 29.5 |
≥12 to <16 years | 516 | 21.5 |
≥16 years | 1178 | 49.0 |
Marital status | ||
Married | 1587 | 66.0 |
Other | 819 | 34.0 |
Income | ||
≤$40 000/year | 1003 | 43.4 |
$40 001–$80 000/year | 765 | 33.2 |
>$80 000/year | 540 | 23.4 |
Smoking | ||
None | 2276 | 94.5 |
<10 cigarettes/day | 86 | 3.6 |
≥10 cigarettes/day | 45 | 1.9 |
Alcohol use | ||
Any | 58 | 2.4 |
None | 2347 | 97.6 |
Prepregnancy BMI (kg/m2)a | ||
Underweight (<18.5) | 87 | 3.7 |
Normal weight (18.5–24.9) | 1191 | 50.8 |
Overweight (25.0–29.9) | 564 | 24.1 |
Obese (≥30.0) | 502 | 21.4 |
Age at menarche | ||
≤11 years old | 531 | 22.2 |
12–13 years old | 1258 | 52.7 |
≥14 years old | 599 | 25.1 |
Parity | ||
Nulliparous | 1193 | 49.6 |
1 | 759 | 31.5 |
2+ | 455 | 18.9 |
Pregnancy loss history | ||
No prior loss | 720 | 29.9 |
≥1 pregnancy with no loss | 1178 | 48.9 |
≥1 pregnancy with ≥1 loss | 509 | 21.2 |
NVPb symptom severity | ||
No symptom | 279 | 11.6 |
Nausea symptoms only | 852 | 35.4 |
Nausea and vomiting | 1274 | 53.0 |
aBMI, body mass index, based on World Health Organization classifications.
bNVP, nausea and vomiting during pregnancy.