Table 3

 Comparison of men who in 1991, aged 33 years, had ever worked in “target” occupations, according to colour vision status

OccupationNormal colour visionColour vision defectDifference in proportion
n = 3665n = 267% normal – % CVD
n%n%% difference95% CIp value
*Preclusion on basis of safety.
†Preclusion on basis of quality of product.
‡Total less than sum by occupation as an individual may have been in more than one “target” occupation.
Armed forces*1363.793.40.3−1.9 to 2.60.77
Transport operation*80.2000.20.07 to 0.40.005
Aircraft and ships’ officers*361.0001.00.7 to 1.3<0.001
Police, fire-fighting, and protective services*2085.793.42.30.01 to 4.60.05
Electrical and electronic engineering*391.1001.10.7 to 1.4<0.001
Electrical fitting and wiring*280.831.1−0.4−1.7 to 0.90.59
Electrical installation and maintenance*1794.993.41.5−0.8 to 3.80.19
Medicine, pharmacy, health diagnosing, and treatment*†501.441.5−0.1−1.6 to 1.40.86
Laboratory and engineering technology*†263.472.60.8−1.2 to 2.80.43
Painting and related coating†842.372.6−0.3−2.3 to 1.60.74
Fibre and textile processing†611.710.41.30.4 to 2.10.003
Wood processing and paper making†90.310.4−0.1−0.9 to 0.60.74
Horticulture†752.151.90.2−1.5 to 1.90.84
Biological, chemical, and geological science†381.041.5−0.5−2.0 to 1.00.55
Printing, paper, and photographic processing†371.020.80.3−0.8 to 1.30.64
Art, sculpture, photography, and industrial design†521.541.5−0.08−1.6 to 1.40.92
Total in target occupations ‡101327.66022.55.2−0.05 to 10.40.05