Fig 1.
Flow diagram describing the selection of participants included in the present study.
Table 1.
General characteristics of study subjects aged 19–49 years old in the Korea National Health Examination and Nutritional Survey (KNHANES), Phase VI, 2013–2014.
Table 2.
Prevalence of myopia in various age groups.
Fig 2.
Prevalence of myopia, low myopia and high myopia by various age groups in two stratified groups according to serum 25(OH)D concentration (low 25 (OH)D = serum 25(OH)D concentration < 9 ng/mL; high low 25 (OH)D = serum (OH)D concentration ≥ 9 ng/mL).
Table 3.
Prevalence of myopia by various age groups in two stratified groups according to serum 25(OH)D concentration.
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.
Table 5.
Association with potential risk factors for the likelihood of high and low myopia relative to non-myopia among adults aged between 19 and 49 years in the Korea National Health Examination and Nutritional Survey (KNHANES) Phase VI, 2013–2014.
Table 6.
2014 The association of the serum 25(OH)D concentration with total, low, and high myopia in two strata for time spent on near time work ≤2 hours/day vs. ≥3 hours/day) among adults at age 19–49 years old in the Korea National Health Examination and Nutritional Survey (KNHANES) Phase VI, 2013–2014.