Table 1

Comparisons of demographic characteristics, medical history, behaviour and ocular parameters between the included and excluded individuals

CharacteristicIncluded (n=2946)Excluded (n=1847)t/x2P value
Age58.91±10.7553.95±11.06−15.281<0.001
Gender10.7410.001
 Male1307 (44.4)909 (49.2)
 Female1639 (55.6)938 (50.8)
Education0.5620.453
 Below high school2857 (97.0)1784 (96.6)
 High school or above89 (3.0)63 (3.4)
BMI25.73±4.0626.09±3.773.1600.002
SBP144.27±22.61141.30±21.96−4.508<0.001
DBP83.59±12.9184.77±13.133.0760.002
Hypertension4.3640.037
 Yes897 (33.0)521 (30.0)
 No1818 (67.0)1213 (70.0)
Coronary heart disease3.8770.049
 Yes244 (9.2)129 (7.5)
 No2418 (90.8)1598 (92.5)
Diabetes5.5390.019
 Yes120 (4.5)104 (6.1)
 No2564 (95.5)1609 (93.9)
Current smoker0.1930.660
 Yes749 (26.7)470 (26.1)
 No2055 (73.3)1329 (73.9)
Triglycerides1.40±1.061.45±1.281.4200.156
HbA1c5.75±0.775.78±0.991.1160.265
HDL1.23±0.281.21±0.27−2.0470.041
LDL2.69±0.752.63±0.75−2.6370.008
Keratometry OD44.19±1.5444.14±1.52−1.1240.261
Keratometry OS44.19±1.5744.10±1.53−1.9530.051
SE OD0.40±1.89−0.40±2.30−10.899<0.001
SE OS0.43±1.90−0.35±2.22−11.215<0.001
BCVA OD0.72±0.170.40±0.25−47.097<0.001
BCVA OS0.71±0.170.38±0.24−50.777<0.001
IOP OD11.65±2.5712.00±2.454.702<0.001
IOP OS12.17±2.3312.56±2.615.268<0.001
CCT OD532.61±29.75535.05±29.352.6950.007
CCT OS532.25±29.74534.93±29.132.9680.003
AL OD22.81±1.0522.95±1.054.195<0.001
AL OS22.76±0.9022.92±0.945.675<0.001
ACD OD2.76±0.352.84±0.397.424<0.001
ACD OS2.75±0.352.85±0.368.792<0.001
Vertical C/D OD0.35±0.130.35±0.140.6860.493
Vertical C/D OS0.35±0.130.35±0.141.5570.120
  • All data were shown as M± SD or n (%).

  • ACD, anterior chamber depth; AL, axial length; CCT, central corneal thickness; DBP, diastolic blood pressure; HDL, high-density lipoprotein; IOP, intraocular pressure; LDL, low-density lipoprotein; SBP, systolic blood pressure; SE, spherical equivalent; Vertical C/D, vertical cup disc ratio.