Table 1.
The comparison of the demographics and risk factors of the participants with ELA and no ELA.
| With no ELA3452 (44.56%) | With ELA4295 (55.44%) | t/χ2 | p | |
|---|---|---|---|---|
| Mean (SD) / N (%) | Mean (SD) / N (%) | |||
| Age, year | 20.72(1.15) | 20.76(1.14) | 1.709 | 0.087 |
| Sex | ||||
| Boys | 1839(53.27) | 2108(49.08) | 13.465 | <0.001 |
| Girls | 1613(46.73) | 2187(50.92) | ||
| Minority | 349(10.11) | 486(11.31) | 7.971 | 0.436 |
| Birth in rural | 1024(29.66) | 1860(43.31) | 152.418 | <0.001 |
| Only-child | 2222(64.37) | 2353(54.78) | 72.698 | <0.001 |
| Low family income | 316(9.15) | 591(13.76) | 39.278 | <0.001 |
| Exposure of COVID-19 related events | 0.74(1.25) | 0.92(1.44) | 5.821 | <0.001 |