Table 1.
Characteristics of the participants (n = 6276)
| Characteristics | n (%) or Mean ± SD |
|---|---|
| Gender | |
| Boy | 3199 (51.0) |
| Girl | 3077 (49.0) |
| Ethnicity | |
| Han | 6223 (99.2) |
| Minority | 53 (0.8) |
| Age (years) | 9.7 ± 2.3 |
| District | |
| Urban | 4172 (66.5) |
| Rural | 2104 (33.5) |
| Education level | |
| Primary school | 4156 (66.2) |
| Middle school | 2120 (33.8) |
| C-FAI a score | 59.4 ± 23.6 |
| Children dimension | |
| Only-child family | 2168 (34.5) |
| Multi-child family | 4108 (65.5) |
| Household composition | |
| Two-parent | 4411 (70.3) |
| Single-parent | 1147 (18.3) |
| Grand-parent | 718 (11.4) |
| Family income (yuan/monthly) | |
| ≤ 2000 | 455 (7.2) |
| 2001–5000 | 1538 (24.5) |
| 5001–10,000 | 2680 (42.7) |
| 10,001–20,000 | 1166 (18.6) |
| > 20,000 | 437 (7.0) |
| Pocket money (yuan/weekly) | |
| ≤ 20 | 4371 (69.6) |
| 21–50 | 1494 (23.8) |
| > 50 | 411 (6.5) |
| Father’s age (years) | 38.6 ± 6.1 |
| Mother’s age (years) | 36.0 ± 5.7 |
| Father’s occupation | |
| Farmer | 578 (9.2) |
| Worker | 2029 (32.3) |
| Technical personnel | 452 (7.2) |
| Leader | 917 (14.7) |
| Staff | 940 (15.0) |
| Self-employed | 1106 (17.6) |
| Unemployed | 254 (4.0) |
| Mother’s occupation | |
| Farmer | 679 (10.8) |
| Worker | 682 (10.9) |
| Technical personnel | 591 (9.4) |
| Leader | 542 (8.6) |
| Staff | 1537 (24.5) |
| Self-employed | 1054 (16.8) |
| Unemployed | 1191 (19.0) |
| Father’s education | |
| Middle school and below | 2743 (43.7) |
| High school | 1600 (25.5) |
| Technical school | 670 (10.7) |
| College and above | 1263 (20.1) |
| Mother’s education | |
| Middle school and below | 2868 (45.7) |
| High school | 1477 (23.5) |
| Technical school | 722 (11.5) |
| College and above | 1209 (19.3) |
Note: Categorical variables are described as n (%) and continuous variables are described as Mean ± SD. a means the Chinese Family Assessment Instrument