Sociodemographic characteristics
| N (%) | Knowledge score | Attitude score | |||
| Mean±SD | P value | Mean±SD | P value | ||
| Total score | 30.95±11.76 | 27.45±3.48 | |||
| Sex | 0.186 | 0.006 | |||
| Male | 171 (29.43) | 29.72±12.59 | 26.78±3.74 | ||
| Female | 410 (70.57) | 31.45±11.36 | 27.71±3.32 | ||
| Age (years) | 0.047 | 0.001 | |||
| ≤20 | 97 (16.7) | 31.43±12.32 | 28.59±3.22 | ||
| 21–30 | 372 (64.03) | 31.47±11.58 | 27.25±3.37 | ||
| >30 | 112 (19.28) | 28.78±11.69 | 27.06±3.82 | ||
| Registered residence | 0.542 | 0.001 | |||
| Agricultural household registration | 247 (42.51) | 30.41±12.24 | 26.89±3.63 | ||
| Non-agricultural household registration | 334 (57.49) | 31.33±11.38 | 27.85±3.30 | ||
| Education level | 0.001 | 0.016 | |||
| Senior middle school or lower | 52 (8.95) | 25.44±11.38 | 26.36±2.81 | ||
| Junior college/college | 449 (77.28) | 31.24±11.95 | 27.57±3.54 | ||
| Postgraduate or higher | 80 (13.77) | 32.86±9.833 | 27.43±3.38 | ||
| Occupation, N (%) | 0.418 | 0.294 | |||
| Government administrators of the country or leaders of enterprises and public institutions | 24 (4.13) | 30.75±10.17 | 26.08±3.72 | ||
| Professionals (teachers, engineering technicians, writers, etc) | 127 (21.86) | 32.74±10.60 | 27.62±3.49 | ||
| Clerks or relevant personnel | 34 (5.85) | 31.55±11.29 | 27.05±2.83 | ||
| Personnel in commercial business or service | 68 (11.7) | 31.54±11.30 | 27.85±3.22 | ||
| Personnel in farming, forestry, animal husbandry, fishery, etc | / | ||||
| Operators of production or transportation equipment or relevant personnel | 18 (3.1) | 31.16±8.826 | 26.88±2.51 | ||
| Army personnel | 3 (0.52) | 25.33±20.10 | 28.66±3.21 | ||
| Housewife | 9 (1.55) | 30.88±8.565 | 27.55±3.04 | ||
| Personnel in then medical and relevant industry | 27 (4.65) | 33.40±13.26 | 28.11±4.36 | ||
| Others | 271 (46.64) | 29.69±12.53 | 27.38±3.55 | ||
| Monthly income per capita (Yuan) | 0.232 | 0.137 | |||
| ≤5000 | 79 (13.6) | 29.36±11.92 | 26.54±3.80 | ||
| 5000–10 000 | 232 (39.93) | 30.46±11.81 | 27.68±3.26 | ||
| 10 000–20 000 | 179 (30.81) | 31.97±11.75 | 27.43±3.55 | ||
| ≥20 000 | 91 (15.66) | 31.51±11.43 | 27.61±3.46 | ||
| Daily screen usage time (h) | 0.369 | 0.877 | |||
| <4 | 102 (17.56) | 30.71±11.73 | 27.50±3.25 | ||
| 4–6 | 172 (29.6) | 30.62±10.78 | 27.47±3.65 | ||
| >6 | 307 (52.84) | 31.20±12.30 | 27.40±3.45 | ||
| Reasons for surgical correction of visual acuity (multiple choices) | |||||
| Remove the glasses and improve appearance | 238 (40.96) | ||||
| Study in higher schools, job selection or joining the army | 126 (21.69) | ||||
| Inconvenience in putting up and off the glasses | 394 (67.81) | ||||
| Others | 14 (3.36) | ||||
| Surveyed before or after refractive error surgery | <0.001 | <0.001 | |||
| Before | 164 (28.23) | 27.37±11.73 | 26.60±3.26 | ||
| After | 417 (71.77) | 32.35±11.47 | 27.77±3.50 | ||