Table 2.
Characteristics of participant pregnant women of the Inma–Valencia study, 2004–2006
| Characteristics | Subjects (%) |
|---|---|
| Maternal age (in years) |
|
| ≤ 29 |
336 (45) |
| 30–34 |
285 (39) |
| ≥35 |
119 (16) |
| Educational level |
|
| ≤Primary School |
249 (34) |
| Secondary School |
314 (42) |
| University |
177 (24) |
| Country of origin |
|
| Spain |
651 (88) |
| Other countries |
89 (12) |
| Socioeconomic status categories |
|
| I+II, upper |
118 (16) |
| III, middle |
178 (24) |
| IV+V, lower |
444 (60) |
| Pre-pregnancy body mass index (in kg/m2) |
|
| <25 |
526 (71) |
| 25.0–29.9 |
139 (19) |
| ≥ 30 |
75 (10) |
| Smoking during pregnancy |
|
| No |
439 (59) |
| First trimester only |
128 (17) |
| All pregnancy |
173 (24) |
| Alcohol intake |
|
| None |
518 (70) |
| 0–1 g/d |
146 (20) |
| >1 g/d |
76 (10) |
| Gestational weight gain (missing=13) |
|
| Normal |
261 (36) |
| Low |
179 (25) |
| High |
287 (39) |
| Parity |
|
| 0 |
407 (55) |
| ≥1 |
333 (45) |
| Medical problems in previous pregnancies (missing n=6) |
|
| Yes |
150 (20) |
| Use of supplement containing (any time in pregnancy): |
|
| Folic acid (missing=32) |
675 (95) |
| Vitamin C |
413 (56) |
| Vitamin B12 | 645 (87) |
(N=740).