Table 1 Basic characteristics of the study population from a birth cohort study in Wuhan, China (N = 1088 mother-child pairs)
Total | |
|---|---|
Maternal characteristics | |
Age at delivery, years | 28 (27, 31) |
Pre-pregnancy BMI, kg/m² | 20.7 (19.1, 22.8) |
Folic acid supplementation during pregnancy | |
No | 120 (11.0%) |
Yes | 968 (89.0%) |
Maternal education level | |
High school or equivalent and below (≤12 years) | 196 (18.0%) |
Bachelor’s degree and above (>12 years) | 892 (82.0%) |
Annual household income (yuan) | |
<100,000 | 570 (52.4%) |
≥100,000 | 518 (47.6%) |
Parity | |
Nulliparous | 881 (81.0%) |
Multiparous | 207 (19.0%) |
Neonatal characteristics | |
Infant sex | |
Female | 499 (45.9%) |
Male | 589 (54.1%) |
Gestational age, weeks | 39.4 (38.7, 40.1) |
Birth weight, g | 3345 (3070, 3650) |
Low birth weight | |
No | 1062 (97.6%) |
Yes | 26 (2.4%) |
Preterm delivery | |
No | 1061 (97.5%) |
Yes | 27 (2.5%) |
MDI | 114 (95, 126) |
PDI | 108 (96, 122) |
Cognitive development delay (MDI < 70) | |
No | 998 (91.7%) |
Yes | 90 (8.3%) |
Psychomotor development delay (PDI < 70) | |
No | 1056 (97.1%) |
Yes | 32 (2.9%) |
