Skip to main content

Table 1 Clinical characteristics of the study participants according to the presence of pterygium in the Korean population (n = 12,258)

From: Association between pterygium, sun exposure, and serum 25-hydroxyvitamin in a nationally representative sample of Korean adults

  Pterygium P
No Yes
n = 11,389 n = 869
Age, years 44.3 ± 0.3 63.2 ± 0.6 < 0.001
Sex, % men 49.3 (0.5) 46.9 (2) 0.23
BMI, kg/m2 23.61 ± 0.05 23.9 ± 0.1 0.11
WC, cm 80.9 ± 0.2 83.5 ± 0.4 < 0.001
Serum 25(OH)D concentration, ng/mL 17.4 ± 0.2 19.7 ± 0.3 < 0.001
Education, % of ≥12 years 72.9 (0.8) 26.2 (2) < 0.001
Income, % of lowest Q1 15.7 (0.6) 37.4 (2.1) < 0.001
Current smoker, % 24.5 (0.6) 17.3 (1.6) < 0.001
Heavy drinker, % 10.5 (0.4) 8.2 (1.4) 0.13
Regular exercise, % 20.8 (0.6) 22.8 (1.9) 0.25
Occupation, % 64.9 (0.6) 60.9 (2.4) 0.08
Cataract, % 22.7 (0.9) 61.1 (2.7) < 0.001
Blepharoptosis, % 7.4 (0.5) 17.3 (1.8) < 0.001
Metabolic syndrome, % 24.5 (0.5) 44.4 (2.4) < 0.001
Diabetes, % 8.2 (0.3) 14.5 (1.7) < 0.001
Hypertension, % 26.4 (0.6) 51.1 (2.3) < 0.001
Daily sun exposure, %    < 0.001
< 2 h 60.7 (0.9) 46.8 (2.6)  
2–5 h 25.9 (0.8) 24 (2)  
> 5 h 13.4 (0.7) 29.3 (2.6)  
  1. Data are presented as the weighted mean ± standard error or weighted percent (standard error)
  2. BMI = body mass index, WC = waist circumference, 25(OH)D = 25-hydroxyvitamin D