Table 1 Characteristics of the infants and toddlers from the MING study
Characteristics | Percent | Standard error |
|---|---|---|
Child’s sex | ||
Male | 54.6 | 1.4 |
Female | 45.4 | 1.4 |
Child’s Ethnicity | ||
Han | 95.0 | 0.6 |
Non-Han | 5.0 | 0.6 |
Age of mother at birth(y) | ||
< 19 | 0.8 | 0.2 |
20–24 | 22.9 | 1.1 |
25–29 | 44.7 | 1.4 |
30–34 | 22.5 | 1.1 |
35–39 | 7.4 | 0.7 |
≥ 40 | 1.7 | 0.4 |
Mother’s education | ||
Did not attend school | 0.6 | 0.2 |
Primary school | 2.7 | 0.4 |
Middle school | 17.9 | 1.0 |
High school/Secondary specialized school | 22.1 | 1.1 |
Technical College | 22.7 | 1.1 |
Bachelor’s degree | 25.0 | 1.2 |
Master’s degree or above | 9.0 | 0.8 |
Average monthly income (per family member) | ||
< RMB 500 (<USD 80) | 1.1 | 0.2 |
RMB 501–1500 (USD 80–240) | 10.4 | 0.6 |
RMB 1501–2000 (USD 240–320) | 14.3 | 0.7 |
RMB 2001–3000 (USD 320–480) | 20.8 | 0.8 |
RMB 3001–4000 (USD 480–640) | 14.0 | 0.7 |
RMB 4001–6000 (USD 640–960) | 13.8 | 0.7 |
RMB 6001–8000 (USD 960–1280) | 7.6 | 0.5 |
> RMB 8000 (USD 1280) | 11.3 | 0.7 |
Unspecified | 4.4 | 0.4 |
The main caregiver | ||
Mother | 60.4 | 1.3 |
Father | 0.5 | 0.2 |
Grandparent(s) | 36.7 | 1.3 |
Nanny | 1.1 | 0.3 |
Others | 1.3 | 0.3 |
Missing(not reported) | 3.8 | 0.5 |