Table 2: Characteristics of 883 car drivers aged 18 to 59 years.
| Characteristics | Total (n = 883) | Drivers meeting visual function requirements (n = 849) |
Drivers not meeting visual function requirements (n = 34) |
p-value |
| Males, n (%) | 360 (40.8) | 339 (39.9) | 21 (61.8) | 0.011 |
| Caucasians, n (%) | 867 (98.2) | 836 (98.5) | 31 (91.2) | < 0.001 |
| Age groups (in years), n (%) | 0.007 | |||
| 18-29 | 203 (23) | 200 (23.6) | 3 (6.8) | |
| 30-39 | 144 (16.3) | 139 (16.4) | 5 (14.7) | |
| 40-49 | 239 (27.1) | 232 (27.3) | 7 (20.6) | |
| 50-59 | 297 (33.6) | 278 (32.7) | 19 (55.9) | |
| Mean patient age (years ± SD) | 41.5 ± 12.2 | 41.3 ± 12.2 | 47.5 ± 10.6 | 0.002 |
| Education level, n (%) | < 0.001 | |||
| Primary or less | 25 (2.8) | 20 (2.3) | 5 (14.7) | |
| Secondary | 268 (30.4) | 258 (30.4) | 10 (29.4) | |
| Tertiary of higher | 590 (66.8) | 571 (67.3) | 19 (55.9) | |
| Employment status, n (%) Student | 87 (9.9) | 85 (10) | 2 (5.9) | NS |
| Never worked | 138 (15.6) | 130 (15.3) | 8 (23.5) | |
| Worker | 607 (68.7) | 586 (69) | 21 (61.8) | |
| Retired | 51 (5.8) | 48 (5.7) | 3 (8.8) | |
| Marital status, n (%) | < 0.001 | |||
| Single or without a partner drives | 341 (38.6) | 311 (36.6) | 30 (88.2) | |
| With a partner who drives | 542 (61.4) | 538 (63.4) | 4 (11.8) | |
| Time interval between last ophthalmological examination and the study visit (years) |
0.001 | |||
| < 1 | 210 (23.8) | 209 (24.6) | 1 (2.9) | |
| > 1 and < 5 | 356 (40.3) | 345 (40.6) | 11 (32.4) | |
| > 5 | 317 (35.9) | 295 (34.7) | 22 (64.7) | |
| Far vision corrective lenses, n (%) | 430 (48.7) | 412 (48.5) | 18 (52.9) | NS |
| Access to public transport, n (%) | 648 (73.4) | 636 (74.9) | 12 (35.3) | < 0.001 |
| Resort to acquaintances, n (%) | 744 (84.2) | 734 (86.5) | 10 (29.4) | < 0.001 |
| Access to shops, n (%) | 607 (68.7) | 594 (70) | 13 (38.2) | < 0.001 |
| Self-reported central vision impairment, n (%) | 199 (22.5) | 188 (22.1) | 11 (32.4) | NS |
| Self-reported peripheral vision impairment, n (%) Mean visual acuity (logMAR units ± SD) |
26 (2.9) | 23 (2.7) | 3 (8.8) | 0.039 |
| Right eye | 0.05 ± 0.70 | 0.03 ± 0.80 | 0.37 ± 0.56 | < 0.001 |
| Left eye | 0.04 ± 0.78 | 0.03 ± 0.84 | 0.34 ± 0.63 | < 0.001 |
| Binocular | 0.02 ± 0.90 | 0.02 ± 0.86 | 0.31 ± 0.60 | < 0.001 |
| Esterman visual field score | 97% | 98% | 80% | < 0.001 |
NS: Not Significant.