Table 1 Demographic characteristics and risk factors
From: Symptoms of ocular surface disease in construction workers: comparative study with office workers
Variable | Total n = 304 (100%) | Construction workers n = 149 (49%) | Office workers n = 155 (51%) | P (95% CI) |
|---|---|---|---|---|
Age (SD) years | 34.04 ± 10.63 | 35.12 ± 11.40 | 33.03 ± 9.77 | 0.08 a (−0.32,4.50) |
Gender M/F (%) | 193/111 (63.5/36.5) | 147/2 (98.7/1.3) | 46/109 (29.7/70.3) | < 0.0001 b |
Smokers (%) | 94 (30.9) | 66 (44.3) | 28 (18.1) | < 0.0001 b |
Contact lens users (%) | 25 (8.2) | 2 (1.3) | 23 (14.8) | 0.0001 b |
Computer hours per day | 4.39 ± 4.24 | 0.40 ± 1.41 | 8.19 ± 1.86 | < 0.0001 c |
Working hours per day | 9.38 ± 1.90 | 9.63 ± 2.03 | 8.56 ± 1.02 | 0.0001 a (0.48,1.69) |
Ocular disease | 48 (15.8) | 15 (10.1) | 33 (21.3) | 0.007 b |
Systemic disease | 21 (6.9) | 9 (6) | 12 (7.7) | 0.55 b |