Table 1 Characterization of the study sample. BRISA Birth Cohort – São Luís, Maranhão, Brazil
Variable | Category | Mean | Standard deviation |
|---|---|---|---|
Mother’s age (years) | 26.1 | 5.4 | |
Number of children | 1.7 | 0.9 | |
Depression score | 14.9 | 10.0 | |
Birth weight (grams) | 3.249 | 497.9 | |
Gestational age (weeks) | 39.3 | 2.0 | |
n | (%) | ||
Intrauterine Growth Restriction | Yes | 173 | 15.3 |
No | 958 | 84.7 | |
Violence during pregnancy | Yes | 562 | 49.7 |
No | 569 | 50.3 | |
Physical violence during pregnancy | Yes | 141 | 12.5 |
No | 990 | 87.5 | |
Psychological violence during pregnancy | Yes | 549 | 48.5 |
No | 582 | 51.5 | |
Skin color/Ethnicity | Mixed race | 764 | 67.6 |
White | 177 | 15.7 | |
Black | 170 | 15.0 | |
Asian | 20 | 1.8 | |
Schooling | 12 or more | 138 | 12.2 |
9–11 years | 863 | 76.2 | |
5–8 years | 102 | 9.0 | |
0–4 years | 28 | 2.5 | |
Marital status | Married/stable union | 922 | 81.5 |
Single/separated/widowed | 209 | 18.5 | |
Mother’s occupation | Manual work | 375 | 33.2 |
Non-manual work | 190 | 16.8 | |
Does not work | 566 | 50.0 | |
Socioeconomic status | A/B | 176 | 15.6 |
C | 770 | 68.1 | |
D/E | 185 | 16.4 | |
Pregnancy planning | No | 740 | 65.4 |
Yes | 391 | 34.6 | |
Type of delivery | Normal | 567 | 50.1 |
Cesarean section | 564 | 49.9 |