Table 1.
General characteristics of the sample
| Characteristics | Size [N (%)] |
Age [years] (Average ± SD) |
UVA [< 95VAR] N(%) |
Myopia | ||||
|---|---|---|---|---|---|---|---|---|
| SE≤-0.50D | SE≤-0.50D and UVA < 95VAR | |||||||
| N(%) | p-value ( ) |
N(%) | p-value ( ) |
|||||
| Total sample | 1115(100) | 12.7 ± 1.5 | 516(46.3) | 262(23.5) | -- | 240(21.5) | -- | |
| Sex | Male | 568(51.0) | 12.7 ± 1.5 | 245(43.1) | 133(23.4) | 0.957 | 121(21.3) | 0.857 |
| Female | 547(49.0) | 12.7 ± 1.5 | 271(49.5) | 129(23.6) | 119(21.8) | |||
| Nature | Portuguese | 941(84.4) | 12.6 ± 1.5 | 438(46.5) | 221(23.5) | 0.982 | 201(21.4) | 0.756 |
| Migrants | 174(15.6) | 12.8 ± 1.5 | 78(44.9) | 41(23.6) | 39(22.4) | |||
| School level | 2nd cycle | 437(39.2) | 11.2 ± 0.7 | 190(43.5) | 77(17.8) | < 0.001** | 74(16.9) | 0.003** |
| 3rd cycle | 678(60.8) | 13.6 ± 1.0 | 326(48.1) | 185(27.3) | 166(24.5) | |||
| SEN | Positive | 131(11.7) | 13.0 ± 1.4 | 74(56.5) | 29(21.1) | 0.686 | 25(19.1) | 0.469 |
| Negative | 984(88.3) | 12,6 ± 1.5 | 442(44.9) | 233(23.7) | 215(21.8) | |||
| School location | Urban | 751(67.4) | 12.8 ± 1.5 | 360(47.9) | 195(26) | 0.005** | 176(23.4) | 0.026* |
| Suburban | 364(32.6) | 12.5 ± 1.5 | 156(42.9) | 67(18.4) | 64(17.6) | |||
N - counts; % - proportions; SD – standard deviation - UVA – uncorrected visual acuity; VAR – visual acuity rating scale; SE – spherical equivalent; SEN – special educational needs
*Significant at 0.05 level; ** significant at 0.001 level