Table 4. Association with potential risk factors for the likelihood of myopia among adults aged between 19 and 49 years in the Korea National Health Examination and Nutritional Survey (KNHANES) Phase VI, 2013–2014.
| Variables | Non-myopia (N = 1,025) N |
Myopia (N = 2,373) N |
OR (95% CI)1 |
|---|---|---|---|
| Age (years) | |||
| 19–29 | 150 | 652 | 2.11 (1.64, 2.73) |
| 30–39 | 310 | 862 | 1.59 (1.31, 1.94) |
| 40–49 | 565 | 859 | 1.00 |
| Education level (years) | |||
| <12 | 555 | 1,047 | 1.00 |
| 12+ | 372 | 1,143 | 1.49 (1.23, 1.80) |
| Parental myopia | |||
| No | 885 | 1,888 | 1.00 |
| Yes | 75 | 347 | 1.55 (1.12, 2.13) |
| Serum 25(OH)D (ng/ml) | |||
| <9 | 27 | 114 | 1.00 |
| 9+ | 382 | 991 | 0.62 (0.38, 1.01) |
| Near work (hours/day) | |||
| ≤2 | 576 | 935 | 1.00 |
| 3+ | 449 | 1,438 | 1.52 (1.28, 1.81) |
| WBC counts x103 | |||
| <5 | 251 | 453 | 1.00 |
| 5–8.9 | 645 | 1,622 | 1.26 (1.01, 1.56) |
| 9+ | 64 | 151 | 1.11 (0.75, 1.65) |
1. Adjusted for age, educational levels, parental myopia, serum 25(OH)D levels, time spent on near work, and WBC count