Table 2

Protan and tritan colour contrast sensitivity percentage thresholds in 37 insulin dependent diabetic subjects and 27 controls during an initial learning test run breathing room air and during the study inhaling gaseous air via a Ventimask

Diabetic subjects Control subjects
Room air test run Gaseous air Ventimask Room air test run Gaseous air Ventimask
Protan sensitivity % thresholds4.44  (0.41)3.93  (0.39) 3.08  (0.22)2.36  (0.16)
Tritan sensitivity % thresholds8.74  (0.74)8.15  (0.62)6.07  (0.34)5.42  (0.31)

  • ↵Significant difference between test run on room air and gaseous air via Ventimask in diabetic subjects, p<0.05.

  • ↵Significant difference between test run on room air and gaseous air via Ventimask in control subjects, p<0.05.