Table 1.
General characteristics of pregnant women and fetuses1
| Variables | n | Values |
|---|---|---|
|
Pregnant women |
|
|
| Age, y |
327 |
29.9 ± 3.6 |
| Height, cm |
324 |
160.8 ± 4.8 |
| Pre-pregnancy weight, kg |
325 |
56.5 ± 9.7 |
| Pre-pregnancy BMI2, kg/m2 |
323 |
21.9 ± 3.5 |
| Education, n (%) |
337 |
|
| < High school |
|
99 (29.4) |
| < University |
|
59 (17.5) |
| ≥ University |
|
163 (48.4) |
| No-response |
|
16 (4.7) |
| Family income, US$/mo, n (%) |
337 |
|
| < 2000 |
|
95 (28.2) |
| 2000 - 4000 |
|
174 (51.6) |
| > 4000 |
|
43 (12.8) |
| No-response |
|
25 (7.4) |
| Passive smoker, n (%) |
337 |
|
| No |
|
41 (12.2) |
| Yes |
|
268 (79.5) |
| No-response |
|
28 (8.3) |
| Urinary cotinine level, μg/g creatinine |
316 |
71.8 ± 444.2 |
| Supplement users, n (%) |
337 |
|
| No |
|
240 (71.2) |
| Yes |
|
97 (28.8) |
| Parity |
337 |
|
| 0 |
|
180 (53.4) |
| ≥1 |
|
147 (43.6) |
| No-response |
|
10 (3.0) |
| Fetuses |
|
|
| Sex |
323 |
|
| Girls, n (%) |
|
164 (48.7) |
| Boys, n (%) |
|
159 (47.2) |
| Gestational age, wk |
337 |
20.0 ± 3.4 |
| Biparietal diameter, cm |
334 |
4.8 ± 1.1 |
| Abdominal circumference, cm |
231 |
16.6 ± 3.8 |
| Femur length, cm | 297 | 3.3 ± 1.0 |
1 Values are mean ± SD or n (%).