A company developing an artificial retina to help the blind see is trying to determine the quality
Question:
A company developing an artificial retina to help the blind see is trying to determine the quality of life for blind people.
• The company first surveys a group of sighted people using a time tradeoff (TTO) approach. The results indicate that being blind should be assigned a quality weight of q=0.4.
• The company then surveys a group of people who recently became blind due to accidents or glaucoma. The results indicate that being blind should be assigned a quality weight of q=0.1.
• Finally, the company surveys a group of people who were not born blind but became blind over twenty years ago. The results indicate that being blind should be assigned a quality weight of q=0.9.
a. Explain why these three approaches might return different quality of life estimates.
Why might people who have lived with blindness for a long time rate their quality of life so much higher than people who have only recently become blind?
b. For a cost-effectiveness study of a drug that may, as a side-effect, result in blindness, which of these quality weight measures is most appropriate?
c. Now suppose researchers are measuring the cost-effectiveness of artificial retinas, which may be able to restore sight to the blind. Does this change your answer about which quality of life measure to use?
Step by Step Answer: