| Total (N = 2986) | Non-LBC (N = 2445) | LBC (N = 541) | p-value (χ2 test) |
---|---|---|---|---|
Gender (%) | Â | Â | Â | 0.075 |
   Male | 51.4 | 50.7 | 54.9 |  |
   Female | 48.6 | 49.3 | 45.1 |  |
Age (year), Mean (SD) | 14.2 (1.4) | 14.3 (1.5) | 13.7 (1.2) | < 0.001b |
Ethnicity (%) | Â | Â | Â | 0.030 |
   Han | 99.4 | 99.5 | 98.7 |  |
   Others | 0.6 | 0.5 | 1.3 |  |
Grade (%) | Â | Â | Â | < 0.001 |
   Year 1 of junior secondary school | 57.8 | 54.2 | 74.3 |  |
   Year 2 of junior secondary school | 19.5 | 20.3 | 15.7 |  |
   Year 1 of senior secondary school | 22.7 | 25.5 | 10.0 |  |
Boarder in this term (%) | Â | Â | Â | < 0.001 |
   Yes | 12.5 | 13.7 | 6.6 |  |
   No | 87.5 | 86.3 | 93.4 |  |
Father's education (%) | Â | Â | Â | 0.786 |
   Primary school and below | 24.7 | 24.5 | 25.9 |  |
   Junior secondary school | 53.0 | 53.2 | 52.0 |  |
   Senior secondary school and above | 22.3 | 22.3 | 22.1 |  |
Father's occupation (%) | Â | Â | Â | 0.008 |
   Farmer | 31.9 | 33 | 26.5 |  |
   Non-farmer | 68.1 | 67 | 73.5 |  |
Mother's education (%) | Â | Â | Â | 0.005 |
   Primary school and below | 56.1 | 57.2 | 51.0 |  |
   Junior secondary school | 34.1 | 33.7 | 35.9 |  |
   Senior secondary school and above | 9.8 | 9.1 | 13.2 |  |
Mother's occupation (%) | Â | Â | Â | < 0.001 |
   Farmer | 47.6 | 50.2 | 35.4 |  |
   Non-farmer | 52.4 | 49.8 | 64.6 |  |
Living with grandparents (%) | Â | Â | Â | 0.608 |
   Yes | 25.9 | 25.7 | 26.8 |  |
   No | 74.1 | 74.3 | 73.2 |  |
House type (%) | Â | Â | Â | 0.352 |
   Single-storey house | 47.0 | 49.3 | 47.4 |  |
   Multi-storey house | 53.0 | 50.7 | 52.6 |  |
Having computer at home (%) | Â | Â | Â | 0.061 |
   No | 68.2 | 67.4 | 72.0 |  |
   Yes, but not connected with internet | 12.9 | 13.0 | 12.7 |  |
   Yes, already connected with internet | 18.8 | 19.6 | 15.3 |  |