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Table 3 Observed and predicted mean values of 10 COPD health states in the general population

From: Utility estimation of hypothetical chronic obstructive pulmonary disease health states by the general population and health professionals

COPD health states Visual analogue scale Time trade-off
Observed Predicted Difference Observed Predicted Difference
Moderate state without exacerbation 0.753 0.750 0.003 0.820 0.824 −0.004
Moderate state with 1 non-serious exacerbation 0.670 0.673 −0.003 0.746 0.743 0.004
Severe state without exacerbation 0.583 0.572 0.011 0.658 0.646 0.012
Severe state with 1 non-serious exacerbation 0.502 0.494 0.007 0.572 0.565 0.007
Severe state with 1 serious exacerbation 0.413 0.416 −0.003 0.482 0.482 0.000
Severe state with 1 non-serious +1 serious exacerbation 0.339 0.355 −0.016 0.400 0.419 −0.019
Very severe state without exacerbation 0.254 0.268 −0.014 0.297 0.305 −0.008
Very severe state with 1 non-serious exacerbation 0.186 0.191 −0.004 0.212 0.224 −0.011
Very severe state with 1 serious exacerbation 0.116 0.113 0.003 0.141 0.141 0.000
Very severe state with 1 non-serious +1 serious exacerbation 0.067 0.051 0.016 0.096 0.077 0.019