Research Article

Costs and Quality of Life in Diabetic Macular Edema: Canadian Burden of Diabetic Macular Edema Observational Study (C-REALITY)

Table 4

Mean NEI VFQ-25 and EQ-5D scores at 6 months for all patients.

InstrumentMean ( )SD

NEI VFQ-25*
 Composite79.618.7
 Quality of vision 80.017.5
 Vision-related quality of life 79.221.4
 Subscales
  General health50.622.0
  General vision69.616.4
  Ocular pain87.517.8
  Near activity73.725.5
  Distance activity78.923.4
  Social functioning89.119.8
  Mental health72.528.5
  Role difficulties74.929.3
  Dependency80.630.5
  Driving69.930.7
  Color vision92.816.6
  Peripheral vision85.124.5
EQ-5D
 Utility 0.780.23
 VAS 71.017.7

All scores ranged from 0 to 100. Higher scores represent better functioning.
Quality of vision is defined as the mean score of the following subscales: general vision, near activities, distance activities, peripheral vision, and color vision.
Vision-related quality of life is defined as the mean score of the following subscales: driving, ocular pain, role difficulties, dependency, social functioning, and mental health.
The higher the score the better the quality of life, where 0 represents death and 1 represents perfect health.
Scores range from 0 to 100, where 0 represents the worst imaginable health state and 100 represents the best imaginable health state.
EQ-5D: Euroqol 5 dimensions; NEI VFQ-25: National Eye Institute Visual Functioning Questionnaire-25 item; VAS: visual analogue scale.