Table 1.
Sociodemographic and economic characteristics, life and nutritional habits, and reproductive health of women of the BRISA prenatal cohort, São Luís, Brazil, 2010–2013.
| Variables | n | % |
|---|---|---|
| Maternal schooling (years) | ||
| 0–4 | 17 | 1.5 |
| 5–8 | 114 | 10.0 |
| 9–11 | 878 | 77.0 |
| ≥12 | 127 | 11.1 |
| Missing* | 4 | 0.4 |
| Occupation of the family head | ||
| Unskilled manual | 308 | 27.0 |
| Semiskilled manual | 463 | 40.6 |
| Skilled manual | 51 | 4.5 |
| Office functions | 162 | 14.2 |
| Higher level professional | 58 | 5.1 |
| Administrator/manager/director/owner | 37 | 3.2 |
| Missing* | 61 | 5.4 |
| Family income (minimum wages) b | ||
| <1 | 12 | 1.1 |
| 1 and<3 | 527 | 46.2 |
| 3 and<5 | 362 | 31.8 |
| ≥5 | 208 | 18.2 |
| Missing* | 31 | 2.7 |
| Economic class c | ||
| D-E (poorest) | 172 | 15.1 |
| C | 746 | 65.4 |
| A-B (wealthiest) | 170 | 14.9 |
| Missing* | 52 | 4.6 |
| Soft drink consumption (tertiles) | ||
| 1st (no consumption) | 492 | 43.2 |
| 2nd (once a week) | 284 | 24.9 |
| 3rd (two or more times a week) | 357 | 31.3 |
| Missing* | 7 | 0.6 |
| Junk food consumption (tertiles) | ||
| 1st (up to once a week) | 544 | 47.7 |
| 2nd (once or twice per week) | 336 | 29.5 |
| 3rd (two or more times a week) | 259 | 22.7 |
| Missing* | 1 | 0.1 |
| Smoking status during the current pregnancy | ||
| Non-smoker | 1109 | 97.3 |
| Smoker | 28 | 2.5 |
| Missing* | 3 | 0.2 |
| Hypertension during the current pregnancy | ||
| No | 948 | 83.2 |
| Yes | 189 | 16.6 |
| Missing* | 3 | 0.2 |
| Diabetes during the current pregnancy | ||
| No | 1103 | 96.8 |
| Yes | 33 | 2.9 |
| Missing* | 4 | 0.3 |
| Respiratory diseases during the current pregnancy | ||
| No | 1096 | 96.2 |
| Yes | 39 | 3.4 |
| Missing* | 5 | 0.4 |
| Type of delivery | ||
| Vaginal | 566 | 49.6 |
| Caesarean section with labour | 318 | 27.9 |
| Caesarean section without labour | 253 | 22.2 |
| Missing* | 3 | 0.3 |
| Gestational age (weeks) | ||
| Preterm (<37) | 59 | 5.1 |
| Early term (37–38) | 222 | 19.5 |
| Full term and late term (39–41) | 792 | 69.5 |
| Post-term (≥42) | 64 | 5.6 |
| Missing* | 3 | 0.3 |
| Total | 1140 | 100.0 |
aThe SES variable latent for the São Luís BRISA cohort was validated in a previous study45. bMonthly family income based on the monthly Brazilian minimum wage (approximately US$ 290.00 in 2010), categorized as: <1, >1 and <3, 3– and <5, and ≥5. cEconomic class according to the Criteria of Economic Classification – Brazil30. *Values not available. Mean maternal age: 26.12 years/standard deviation ± 5.58. Mean maternal pregestational BMI: 23.08 kg/m2/standard deviation ± 3.98.