Table 3 Linear mixed effect model of factor associated with academic performance of different disciplines
Variables | Chinese lesson | Mathematics lessons | English lessons | |||
|---|---|---|---|---|---|---|
β (95%CI) | P | β (95%CI) | P | β (95%CI) | P | |
Outdoor time, hrs/day | 5.770(3.476 ~ 8.064) | < 0.001* | 4.051(1.851 ~ 6.252) | < 0.001* | 5.737(3.534 ~ 7.940) | < 0.001* |
Sleeping time, hrs/day | 4.682(2.667 ~ 6.698) | < 0.001* | 3.302(1.296 ~ 5.309) | 0.001* | 5.569(3.682 ~ 7.457) | < 0.001* |
Learning time out of school, hrs/day | -1.921(-2.827 ~ -1.015) | < 0.001* | -1.814(-2.710 ~ -0.918) | < 0.001* | -1.041(-1.884 ~ -0.198) | 0.016* |
Gender, girls/boys | 6.101(4.190 ~ 8.013) | < 0.001* | -1.379(-3.284 ~ 0.526) | 0.156 | 4.716(2.923 ~ 6.509) | < 0.001* |
Age | 2.831(1.245 ~ 4.416) | 0.001* | 1.816(0.230 ~ 3.402) | 0.025* | 1.599(0.109 ~ 3.09) | 0.036* |
Father education | ||||||
Junior high school and below | — | — | — | |||
High school or vocational school | 2.349(-0.620 ~ 5.318) | 0.121 | 1.254(-1.715 ~ 4.224) | 0.408 | 3.153(0.362 ~ 5.944) | 0.027* |
Undergraduate or junior college | 5.040(1.498 ~ 8.582) | 0.005* | 4.191(0.666 ~ 7.715) | 0.020* | 6.532(3.216 ~ 9.848) | < 0.001* |
Master degree or above | 3.391(-3.769 ~ 10.550) | 0.353 | 7.336(0.186 ~ 14.487) | 0.044* | 9.275(2.551 ~ 15.999) | 0.007* |
Mother education | ||||||
Junior high school and below | — | — | — | |||
High school or vocational school | 1.726(-1.187 ~ 4.639) | 0.245 | 2.309(-0.599 ~ 5.217) | 0.120 | 0.692(-2.043 ~ 3.426) | 0.620 |
Undergraduate or junior college | 4.941(1.551 ~ 8.331) | 0.004* | 4.021(0.652 ~ 7.389) | 0.019* | 6.580(3.393 ~ 9.766) | < 0.001* |
Master degree or above | 10.166(1.108 ~ 19.225) | 0.028* | 7.337(-1.754 ~ 16.427) | 0.114 | 6.421(-2.134 ~ 14.976) | 0.141 |
Family income (RMB/month) | ||||||
< = 6000 | — | — | — | |||
6000–10,000 | -0.383(-2.927 ~ 2.162) | 0.768 | -0.002(-2.545 ~ 2.542) | 0.999 | 0.553(-1.838 ~ 2.944) | 0.650 |
10,000–20,000 | 2.741(-0.081 ~ 5.562) | 0.057 | 0.604(-2.203 ~ 3.412) | 0.673 | 1.194(-1.450 ~ 3.837) | 0.376 |
> 20,000 | 2.660(-0.944 ~ 6.264) | 0.148 | 1.371(-2.206 ~ 4.947) | 0.453 | 0.061(-3.306 ~ 3.427) | 0.972 |