Variables | N (%) | No CVS N (%) | CVS N (%) | P value (χ2) |
917 (100.00) | 292 (31.84) | 625 (68.16) | ||
Duration of online education | ||||
1–3 months | 60 (6.54) | 27 (45.00) | 33 (55.00) | 0.13 |
3–6 months | 127 (13.85) | 38 (29.92) | 89 (70.08) | |
6–12 months | 353 (38.50) | 114 (32.29) | 239 (67.71) | |
>12 months | 377 (41.11) | 113 (29.97) | 264 (70.03) | |
Device used for online education | ||||
Mobile/Tab | 601 (65.54) | 183 (30.45) | 418 (69.55) | 0.01 |
Computer | 56 (6.11) | 21 (37.50) | 35 (62.50) | |
Mobile and television | 6 (0.65) | 0 (0) | 6 (100.00) | |
Mobile and computer | 243 (26.50) | 80 (32.92) | 163 (67.08) | |
Mobile, computer and television | 11 (1.20) | 8 (72.73) | 3 (163) | |
Online education per day | ||||
<2 hours | 115 (12.54) | 34 (29.57) | 81 (70.43) | 0.01 |
2–6 hours | 607 (66.19) | 211 (34.76) | 396 (65.24) | |
6–12 hours | 167 (18.21) | 45 (26.95) | 122 (73.05) | |
>12 hours | 28 (3.05) | 2 (7.14) | 26 (92.86) | |
User type (online education) | ||||
Use with enough break (15 min break after every 2 hours of use) | 253 (27.59) | 98 (38.74) | 155 (61.26) | 0.02 |
Use with a small break (10 min break after every 2 hours of use) | 428 (46.67) | 129 (30.14) | 299 (69.86) | |
Continuous use (4 hours without break) | 236 (25.74) | 65 (27.54) | 171 (72.46) | |
The device used for entertainment | ||||
Mobile/tab | 493 (53.76) | 141 (28.60) | 352 (71.40) | 0.02 |
Computer | 44 (4.80) | 17 (38.64) | 27 (61.36) | |
Television | 29 (3.16) | 16 (55.17) | 13 (44.83) | |
Mobile and elevision | 153 (16.83) | 45 (29.41) | 108 (70.59) | |
Mobile and computer | 124 (13.52) | 44 (35.48) | 80 (64.52) | |
Television and computer | 5 (0.55) | 1 (20.00) | 4 (80.00) | |
Mobile, computer and television | 69 (7.52) | 28 (40.58) | 41 (59.42) | |
Entertainment per day | ||||
<2 hours | 436 (47.55) | 140 (32.11) | 296 (67.89) | 0.47 |
2–6 hours | 366 (39.91) | 110 (30.05) | 256 (69.95) | |
6–12 hours | 85 (9.27) | 33 (38.82) | 52 (61.18) | |
>12 hours | 30 (3.27) | 9 (30.00) | 21 (70.00) | |
User type (entertainment) | ||||
Use with enough break (15 min break after every 2 hours of use) | 422 (46.02) | 140 (33.8) | 282 (66.82) | 0.38 |
Use with a small break (10 min break after every 2 hours of use) | 334 (36.42) | 97 (29.04) | 237 (70.96) | |
Continuous use (4 hours without break) | 161 (17.56) | 55 (34.16) | 106 (65.84) |
CVS, computer vision syndrome.