Table 4

 Odds ratio and 95% confidence intervals (CI) for the association of computer use and other possible risk factors with glaucoma

Independent variableGlaucoma (+)Glaucoma (−)Age and sex adjustedMulti-variable adjusted*
n (%)n (%)Odds ratio95%CIOdds ratio95%CI
*Adjusted for listed all variables. BMI, body mass index.
BMI (kg/cm2)
    –19.919 (11.5)322 (11.0)1.00(reference)1.00(reference)
    20–25.9121 (73.3)2057 (70.5)0.680.41 to 1.140.670.38 to 1.16
    26–25 (15.2)539 (18.5)0.520.28 to 0.980.480.24 to 0.96
Systolic blood pressure (mm Hg)
    –996 (3.6)128 (4.4)1.00(reference)1.00(reference)
    100–139133 (80.6)2449 (83.9)0.880.37 to 2.071.040.43 to 2.53
    140–26(15.8)341 (11.7)0.860.34 to 2.191.050.39 to 2.82
Ocular hypertension
    None147 (90.2)2774 (97.0)1.00(reference)1.00(reference)
    Present16 (9.8)86 (3.0)2.881.63 to 5.102.201.18 to 4.12
Family history
    None149 (93.1)2662 (93.6)1.00(reference)1.00(reference)
    Present11 (6.9)182 (6.4)1.020.54 to 1.920.740.36 to 1.50
Symptom of migraine
    No–occasionally126 (77.8)2369 (82.2)1.00(reference)1.00(reference)
    Frequently–always36 (22.2)513 (17.8)1.591.08 to 2.361.701.13 to 2.55
Smoking
    Never76 (46.3)1234 (42.2)1.00(reference)1.00(reference)
    Former or current88 (53.7)1674 (57.6)0.750.54 to 1.030.770.55 to 1.10
Alcohol consumption
    0 day/week17 (10.4)258 (8.9)1.00(reference)1.00(reference)
    1–4 days/week64 (39.0)1312 (45.0)0.850.49 to 1.490.780.44 to 1.40
    5 days/week–83 (50.6)1344 (46.1)0.780.45 to 1.350.780.44 to 1.39
Refractive errors
    None24 (14.5)1247 (42.7)1.00(reference)1.00(reference)
    Present141 (85.5)1671 (57.3)4.873.13 to 7.594.262.71 to 6.68
Computer use
    Light users47 (28.5)941 (32.2)1.00(reference)1.00(reference)
    Moderate users78 (47.3)1466 (50.2)1.310.90 to 1.921.180.78 to 1.79
    Heavy users40 (24.2)511 (17.5)2.111.34 to 3.311.661.02 to 2.71