A QALY score of 0 represents what state?

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Multiple Choice

A QALY score of 0 represents what state?

Explanation:
QALYs combine how long someone lives with how good their health is during that time. The quality part is a utility value from 0 to 1, where 0 equals death and 1 equals perfect health. So a year of life in perfect health would count as 1 QALY, a year in death would count as 0 QALYs, and health states in between would yield fractions of QALYs. Some frameworks allow negative values for states worse than death, but in the standard 0-to-1 scale used here, 0 corresponds to death. Therefore a QALY score of 0 represents death. The other options align with different points on the scale: perfect health is 1, a moderate health state falls between 0 and 1, and unknown isn’t a valid QALY value on this scale.

QALYs combine how long someone lives with how good their health is during that time. The quality part is a utility value from 0 to 1, where 0 equals death and 1 equals perfect health. So a year of life in perfect health would count as 1 QALY, a year in death would count as 0 QALYs, and health states in between would yield fractions of QALYs. Some frameworks allow negative values for states worse than death, but in the standard 0-to-1 scale used here, 0 corresponds to death. Therefore a QALY score of 0 represents death. The other options align with different points on the scale: perfect health is 1, a moderate health state falls between 0 and 1, and unknown isn’t a valid QALY value on this scale.

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