Table 2 Univariable analysis of myopia prevalence among adolescents aged 12–15 in Shandong Province who participated in 2024 vision test and questionnaire survey.
Independent variables | Normal vision(%) | Myopia(%) | χ2 | P |
|---|---|---|---|---|
Frequency of using eyes while lying down or leaning forward | 11.258 | 0.010 | ||
Never | 17,926(29.00) | 43,878(71.00) | ||
Occasionally | 8540(28.71) | 21,209(71.29) | ||
Often | 7025(28.14) | 17,937(71.86) | ||
Always | 2732(27.71) | 7128(72.29) | ||
Frequency of using eyes while walking or riding in the car | 28.184 | 0.000 | ||
Never | 17,454(29.11) | 42,505(70.89) | ||
Occasionally | 8413(28.92) | 20,681(71.08) | ||
Often | 6184(28.23) | 15,719(71.77) | ||
Always | 4172(27.06) | 11,247(72.94) | ||
Frequency of outdoor exercise weekly | 53.584 | 0.000 | ||
< 3 | 9310(27.20) | 24,916(72.80) | ||
3–5 | 15,099(28.93) | 37,096(71.07) | ||
> 5 | 11,814(29.57) | 28,140(70.43) | ||
Proper posture for reading and writing | 38.061 | 0.000 | ||
No | 20,065(27.98) | 51,652(72.02) | ||
Yes | 16,158(29.56) | 38,500(70.44) | ||
Distance from eyes to television screen (meter) | 4.011 | 0.045 | ||
< 3 | 11,700(28.30) | 29,646(71.70) | ||
≥ 3 | 24,523(28.84) | 60,506(71.16) | ||
Distance from eyes to computer screen (centimeter) | 5.115 | 0.024 | ||
< 50 | 10,969(28.23) | 27,885(71.77) | ||
≥ 50 | 25,254(28.85) | 62,267(71.15) | ||
Screen duration on smart phone and computer daily (hour) | 8.616 | 0.013 | ||
< 1 | 9091(29.16) | 22,084(70.84) | ||
1–3 | 21,853(28.64) | 54,454(71.36) | ||
> 3 | 5279(27.94) | 13,614(72.06) | ||
Watching television duration daily (hour) | 3.168 | 0.205 | ||
< 1 | 9864(28.96) | 24,202(71.04) | ||
1–3 | 14,576(28.70) | 36,205(71.30) | ||
> 3 | 11,783(28.37) | 29,745(71.63) | ||
Homework duration daily (hour) | 6.922 | 0.031 | ||
< 1 | 11,226(29.04) | 27,429(70.96) | ||
1–3 | 14,366(28.73) | 35,643(71.27) | ||
> 3 | 10,631(28.19) | 27,080(71.81) | ||
Sleep duration daily (hour) | 27.921 | 0.000 | ||
< 6 | 4117(26.99) | 11,137(73.01) | ||
6–8 | 18,742(28.66) | 46,649(71.34) | ||
> 8 | 13,364(29.22) | 32,366(70.78) |
