Table 1.
Basic characteristics of the 56 pairs of mother and infant.
| Characteristics | Description | |
|---|---|---|
| Mother | ||
| Age (years) | 29.9 ± 3.9 | |
| Gestational week | 38.8 ± 0.9 | |
| Household monthly per-capita incomea (RMB: yuan) | <3,000 | 7 (13.0) |
| 3,000–4,000 | 47 (87.0) | |
| Parity | First | 30 (53.5) |
| Second | 22 (39.3) | |
| Current BMI (kg/m2) | 22.6 ± 6.6 | |
| Infant | ||
| Gender | Male | 31 (55.4) |
| Female | 25 (44.6) | |
| Mode of deliveryb | Vaginal delivery | 45 (81.8) |
| Cesarean section | 10 (18.2) | |
| Birth weight (g) | 3,325 (3,000,3,513) |
Continuous variables were presented as the Mean ± SD or median (P25, P75) according to normality of data. Categorical variables were presented as N (%). a means that the income of 54 people was available. b means that the delivery mode of 55 people was available.