Table 1.
Baseline Demographic Characteristics, Full Analysis Set.a
| Age, height, body weight, BMI, mean ± SD (range) | |
| Age, years | 25.3 ± 4.4 (18-36) |
| Height, cm | 164.1 ± 6.7 (143-188) |
| Weight, kg | 61.3 ± 9.0 (39.8-94.0) |
| BMI, kg/m2 | 22.8 ± 3.0 (15.0-30.0) |
| Race, n (%) | |
| White | 1570 (96.3) |
| Black | 9 (0.6) |
| Asian | 15 (0.9) |
| Other | 37 (2.3) |
| Ethnicity,b n (%) | |
| Not Hispanic/Latino | 1135 (69.6) |
| Hispanic/Latino | 486 (29.8) |
| Not reported | 10 (0.6) |
| Educational level, n (%) | |
| Missing | 1 (<0.1) |
| Elementary | 92 (5.6) |
| Secondary | 697 (42.7) |
| College/university | 841 (51.6) |
| Smoking history, n (%) | |
| Never | 954 (58.5) |
| Former | 145 (8.9) |
| Current | 532 (32.6) |
| Alcohol consumption, n (%) | |
| Abstinent | 542 (33.2) |
| Light | 1061 (65.1) |
| Moderate | 28 (1.7) |
| At least 1 birth or abortion, n (%) | |
| Yes | 594 (36.4) |
| No | 1037 (63.6) |
| Time since last birth or abortion, mean ± SD (range) | |
| Days | 1360.8 ± 1162.8 (52-6590) |
| Blood pressurec, mean ± SD (range) | |
| Diastolic, mm Hg | 69.0 ± 8.3 (40-95) |
| Systolic, mm Hg | 113.0 ± 11.5 (68-163) |
| Contraceptive method used within 28 days before screening, n (%) | |
| None | 178 (10.9) |
| Barrier methods | 426 (26.1) |
| Hormonal methods | 1007 (61.7) |
| Intra-uterine device | 13 (0.8) |
| Other | 7 (0.4) |
Abbreviations: BMI, body mass index; SD, standard deviation.
a n = 1631.
b Ethnicity was not reported by 10 participants. The difference between race and ethnicity is not universally recognized, and an absence in reporting one or the other may result from the assumption that “race” is the same as “ethnicity.” Moreover, some defined ethnic groups (eg, Hispanics) do not identify with racial categories (eg, white) or find the race question confusing (http://www.census.gov/population/www/socdemo/race/racefactcb.html).
c n = 1629.