Table 1.
Distribution of the children participating in the longitudinal study and the cross-sectional surveys.
| Total | Mean age ± SD | Urban boys (n; %) | Urban girls (n; %) | Rural boys (n; %) | Rural girls (n; %) | |
|---|---|---|---|---|---|---|
| Cohort of children 3 to 6 years old in 2013 participating in the longitudinal study | ||||||
| Starting year 2013 | 2,602 | 4.6 ± 0.9 | 699 (26.9%) | 612 (23.5%) | 692 (26.6%) | 599 (23.0%) |
| Children aged 5.5 to 6.5 years old participating in the cross-sectional surveys | ||||||
| 2013 | 546 | 5.8 ± 0.2 | 183 (33.5%) | 147 (26.9%) | 114 (20.9%) | 102 (18.7%) |
| 2014 | 897 | 6.0 ± 0.3 | 239 (26.6%) | 236 (26.3%) | 219 (24.4%) | 203 (22.7%) |
| 2016 | 512 | 6.2 ± 0.1 | 133 (26.0%) | 111 (21.7%) | 150 (29.2%) | 118 (23.1%) |