Table 1. Selected sociodemographic maternal characteristics of the Ribeirão Preto Birth Cohort of 2010 in terms of caffeine consumption.
| Characteristic | < 300 mg/day n (%) |
≥300 mg/day n (%) |
p-value |
|---|---|---|---|
| Maternal age (years old) | 0.153 | ||
| 20–34 | 3,543 (74.4) | 111 (77.6) | |
| < 20 | 526 (11.0) | 19 (13.3) | |
| ≥35 | 696 (14.6) | 13 (9.1) | |
| Maternal education (years)* | < 0.001 | ||
| ≥ 12 | 1,099 (23.6) | 8 (5.7) | |
| ≤ 8 | 1,197 (25.7) | 76 (54.7) | |
| 9–11 | 2,358 (50.7) | 55 (39.6) | |
| Occupation of the head of the family* | < 0.001 | ||
| No manual workers | 711 (15.4) | 2 (1.5) | |
| Qualified workers | 702 (15.2) | 8 (5.9) | |
| Semi-qualified workers | 2,072 (45.0) | 68 (50.4) | |
| Not qualified workers | 1,122 (24.4) | 57 (42.2) | |
| Skin Color* | < 0.001 | ||
| White | 2,814 (59.5) | 56 (40.3) | |
| Not white | 1,915 (40.5) | 83 (59.7) | |
| Marital status* | < 0.001 | ||
| With partner | 4,182 (87.8) | 105 (73.4) | |
| Without partner | 581 (12.2) | 38 (26.6) | |
| Total | 4,765 (100) | 143 (100) |
*Excluded cases.