Table 1.
Demographic characteristics among participants between different genders
| Group | Total | Boys | Girls | P | |
|---|---|---|---|---|---|
| n (%) | 2452 (100.0) | 1348 (55.0) | 1104 (45.0) | ||
| Children age (years) (Mean ± SD) | 5.25 ± 0.63 | 5.24 ± 0.64 | 5.25 ± 0.62 | 0.856 | |
| Age at pregnancy (years) (Mean ± SD) | 27.70 ± 4.01 | 27.64 ± 4.00 | 27.77 ± 4.02 | 0.422 | |
| Premature, n (%) | 0.001 | ||||
| Non-premature | 2337 (95.3) | 1220 (54.0) | 59 (72.0) | ||
| Premature delivery | 115 (4.7) | 1040 (46.0) | 23 (28.0) | ||
| Paternal education levels, n (%) | 0.079 | ||||
| Junior high school and below | 205 (8.4) | 128 (9.5) | 77 (7.0) | ||
| Senior high school | 356 (14.5) | 191 (14.2) | 165 (14.9) | ||
| College degree and above | 1766 (72.0) | 954 (70.8) | 812 (73.6) | ||
| Unknown | 125 (5.1) | 75 (5.6) | 50 (4.5) | ||
| Maternal education levels, n (%) | 0.222 | ||||
| Junior high school and below | 266 (10.9) | 154 (11.4) | 112 (10.1) | ||
| Senior high school | 320 (13.1) | 180 (13.4) | 140 (12.7) | ||
| College degree and above | 1762 (71.9) | 949 (70.4) | 813 (73.6) | ||
| Unknown | 104 (4.2) | 65 (4.8) | 39 (3.5) | ||
| Number of children in family, n (%) | 0.106 | ||||
| One | 1236 (50.8) | 697 (52.2) | 539 (49.0) | ||
| Two and more | 1199 (49.2) | 637 (47.8) | 562 (51.0) | ||
| Overweight or obesity, n (%) | < 0.001 | ||||
| Yes | 217 (8.8) | 142 (10.5) | 75 (6.8) | ||
| No | 2235 (91.2) | 1206 (89.5) | 1029 (93.2) | ||
| Screen time > 1 h, n (%) | |||||
| Weekdays | 457 (19.4) | 270 (20.9) | 187 (17.5) | 0.040 | |
| Weekend | 1130 (48.0) | 647 (50.3) | 483 (45.3) | 0.015 | |
| Average | 967 (39.4) | 568 (44.7) | 399 (37.6) | < 0.001 | |
| ADHD symptoms, n (%) | 82 (3.5) | 59 (4.6) | 23 (2.2) | < 0.001 | |
Note:The chi-square test (categorical variables) and t test (continuous variables) were used to test the distribution difference between boys and girls. The P-value is the statistical significance of the difference test