Table I.
Baseline characteristics.
| N = 780 mean ± SD, unless stated | |
|---|---|
| Age, years | 28.4 ± 6.2 |
| Height, cm | 165.0 ± 6.1 |
| Weight, kg | 58.9 ± 9.2 |
| BMI < 30 kg/m2, n (%) | 763 (97.8) |
| BMI ≥ 30kg/m2, n (%) | 17 (2.2) |
| Pregnancy history, n (%) | |
| 0 | 358 (45.9) |
| 1 | 168 (21.5) |
| 2 | 151 (19.4) |
| >2 | 103 (13.2) |
| Delivery history, n (%) | |
| 0 | 430 (55.1) |
| 1 | 184 (23.6) |
| 2 | 139 (17.8) |
| >2 | 27 (3.5) |
| Contraception used in the previous 3 months, n (%) | |
| None | 243 (31.2) |
| Oral | 354 (45.4) |
| Barrier | 133 (17.1) |
| Other* | 50 (6.4) |
| Mean duration of previous contraceptive use, days | 861.6 ± 1208 |
BMI, body mass index.
*
Includes intrauterine device, implants, injection, withdrawal, fertility awareness, vaginal ring, spermicide, postcoital contraception (emergency contraception), and abstention.