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Table 1 Description of the colour vision and social background of the participants by sex (128 men and 291 women)

From: Development and validation of a questionnaire assessing the quality of life impact of Colour Blindness (CBQoL)

  Colour vision category χ 2
CB (N = 65) Borderline (N = 22) Normal vision (N = 332)
Sex Male   57 (88%) 6 (27%) 65 (20%) 118.984a
Female   8 (12%) 16 (73%) 267 (80%)
  SEC Managerial 38 (65%) 10 (56%) 183 (68%) 4.328b
Intermediate 5 (9%) 0 (0%) 24 (9%)
Manual 15 (26%) 8 (44%) 63 (23%)
  1. CB colour blind (Ishihara score 0–9), Borderline normal vision (Ishihara score 10–12), Normal vision (Ishihara score 13–15). SEC Socioeconomic class. Note 17% (73 of 419) of SEC responses were missing or uncategorisable, thus totals do not add up to Ns for each group as a whole
  2. a Sig value: p = 1.5 × 10−26
  3. b Correction with Fisher’s exact test, as three cells had expected frequencies of less than 5