Table 1.
Demographic and lifestyle characteristics of participants (N = 1,992) in a study of mental health in rural Chinese school-children.
| Variable | Total (mean ± SD or %) |
|---|---|
| Age (year) | 13.5 ± 0.88 |
| Grade | |
| 7 | 1,044 (52.4%) |
| 8 | 948 (47.6%) |
| Gender | |
| Female | 1,009 (50.7%) |
| Male | 983 (49.3%) |
| Family wealth index | |
| Lowest (Index value ≤33.3%) | 814 (40.9%) |
| Middle (33.3% < Index value≤66.6%) | 510 (25.6%) |
| Highest (Index value>66.6%) | 668 (33.5%) |
| Ethnicity* | |
| Han | 446 (22.5) |
| Hui | 1,541 (77.5) |
| Visually impaired (vision in the better-seeing eye >0.3 logMAR) | |
| No | 1,587 (79.7) |
| Yes | 405 (20.3) |
| Boarding at school** | |
| Yes | 1,002 (51.1) |
| No | 959 (48.9) |
| Left behind children*** | |
| Yes | 608 (31.5) |
| No | 1,320 (68.5) |
| Number of siblings | 1.94 ± 1.19 |
| Parents’ marital status | |
| Married | 1793 (90.0) |
| Single | 199 (10.0) |
| Parents’ education | |
| Both parents have <9 years of education | 893 (46.1) |
| At least one parent has >9 years of education | 1,044 (53.9) |
| Average study time per day (hour) | 1.15 ± 1.09 |
| Average screen time per day (hour) | 0.88 ± 0.96 |
| Outdoor activity time per day (hour) | 0.91 ± 0.69 |
| Sleep time per day (hour) | 9.65 ± 1.19 |
*Six missing values; **31 missing values; ***64 missing values.