Sex, N(%) |
Males |
180 (25.4) |
529 (74.6) |
0.029 |
Females |
118 (20.2) |
465 (79.8) |
|
Mother’s age when infant born |
|
|
|
<25 |
74 (19.5) |
306 (80.5) |
0.062 |
25–29 |
190 (24.1) |
597 (75.9) |
|
>30 |
30 (29.4) |
72 (70.6) |
|
Grandmother received an education? |
|
|
|
No |
40 (16.6) |
201 (83.4) |
0.003 |
Yes |
161 (26.2) |
454 (73.8) |
|
Father’s highest degree, N(%) |
Primary school |
9 (21.4) |
33 (78.6) |
0.057 |
Middle school |
88 (19.5) |
364 (80.5) |
|
High school |
95 (23.1) |
316 (76.9) |
|
College |
69 (27.2) |
185 (72.8) |
|
University or higher |
36 (30.2) |
83 (69.8) |
|
Mother’s highest degree, N(%) |
|
|
|
Primary school |
11 (15.1) |
62 (84.9) |
0.012 |
Middle school |
115 (20.0) |
459 (80.0) |
|
High school |
96 (25.3) |
281 (74.7) |
|
College |
53 (29.4) |
127 (70.6) |
|
University or higher |
23 (30.3) |
53 (69.7) |
|
Father’s occupation, N(%) |
Unemployed/unskilled labor |
27 (17.3) |
129 (82.7) |
0.030 |
Skilled labor/driver |
122 (21.4) |
447 (78.6) |
|
Teacher/professional/advanced professional |
135 (26.4) |
376 (73.6) |
|
Mother’s occupation, N(%) |
Unemployed/house wife |
65 (19.5) |
269 (80.5) |
0.002 |
Labor/assistant/secretary |
115 (21.1) |
429 (78.9) |
|
Professional/advanced |
109 (29.5) |
260 (70.5) |
|
Birth order |
1 |
236 (22.3) |
823 (77.7) |
0.045 |
>1 |
33 (30.8) |
74 (69.2) |
|
Main caregiver |
Biological parents |
268 (22.5) |
924 (77.5) |
0.032 |
Others |
28 (32.6) |
58 (67.4) |
|
Current place |
City |
237 (25.2) |
703 (74.8) |
0.009 |
Town |
35 (18.7) |
152 (81.3) |
|
Countryside |
23 (15.3) |
127 (84.7) |
|
Preschool area |
Hauchen (suburb) |
113 (22.2) |
396 (77.8) |
0.093 |
Janshe (city) |
135 (25.9) |
387 (74.1) |
|
Xiubu (rural) |
50 (19.2) |
211 (80.8) |
|
Air conditioning |
No |
243 (23.8) |
780 (76.3) |
0.204 |
Yes |
13 (17.3) |
62 (82.7) |
|