New Methods for Analysing the Distribution of EQ-5D Observations

This paper reports new methods for analysing the distribution of EQ-5D observations. The Health State Density Index and Health State Density Curve are used to summarise the extent to which people’s self-reported health on the EQ-5D is concentrated on a few health states, or distributed more evenly over a wide range of health states. This information can be useful in understanding patients’ treatment needs, as well as providing a way of comparing the nature of data provided by different patients or collected using different patient-reported outcome measures.
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