Item | Contribution in the utility algorithm | ||||||
UK | France | Germany | The Netherlands | Spain | Italy | Overall | |
Best health (ASAS HI=0) | 0.88 | 0.87 | 0.81 | 0.90 | 0.91 | 0.90 | 0.88 |
Pain (Q1) | −0.11 | −0.08 | −0.10 | −0.13 | −0.13 | −0.12 | −0.11 |
Sleeping (Q16) | −0.10 | −0.09 | −0.10 | −0.12 | −0.11 | −0.12 | −0.11 |
Being exhausted (Q5) | −0.09 | −0.07 | −0.08 | −0.11 | −0.09 | −0.07 | −0.09 |
Overcome difficulties (Q17) | −0.09 | −0.06 | −0.09 | −0.08 | −0.10 | −0.09 | −0.08 |
Concentration (Q11) | −0.07 | −0.06 | −0.08 | −0.08 | −0.07 | −0.09 | −0.08 |
Standing (Q2) | −0.06 | −0.06 | −0.07 | −0.07 | −0.08 | −0.09 | −0.07 |
Financial changes (Q15) | −0.08 | −0.04 | −0.09 | −0.07 | −0.08 | −0.07 | −0.07 |
Toileting (Q4) | −0.08 | −0.04 | −0.08 | −0.06 | −0.05 | −0.07 | −0.06 |
Frustrated (Q13) | −0.05 | −0.03 | −0.06 | −0.07 | −0.08 | −0.09 | −0.06 |
Walking outdoors (Q10) | −0.07 | −0.05 | −0.06 | −0.05 | −0.07 | −0.07 | −0.06 |
Motivation for physical effort (Q6) | −0.06 | −0.05 | −0.05 | −0.07 | −0.07 | −0.06 | −0.06 |
Sexual relationship (Q7) | −0.05 | −0.04 | −0.06 | −0.05 | −0.07 | −0.06 | −0.06 |
Travelling (Q12) | −0.07 | −0.04 | −0.04 | −0.05 | −0.05 | −0.05 | −0.05 |
Contact with people (Q9) | −0.05 | −0.03 | −0.05 | −0.07 | −0.05 | −0.04 | −0.05 |
Driving (Q8) | −0.04 | −0.04 | −0.05 | −0.04 | −0.04 | −0.05 | −0.04 |
Running (Q3) | −0.03 | −0.04 | −0.05 | −0.04 | −0.04 | −0.05 | −0.04 |
Washing hair (Q14) | −0.02 | −0.02 | −0.03 | −0.03 | −0.08 | −0.03 | −0.03 |
Worst SpA | −0.26 | 0.03 | −0.31 | −0.29 | −0.29 | −0.35 | −0.24 |
Example for mild SpA* | 0.61 | 0.64 | 0.54 | 0.58 | 0.59 | 0.57 | 0.59 |
Italic: Aspects (n=8) included in the health state ‘severe SpA’, which were defined in a pilot study in patients with axial SpA.
To calculate the utilities for a specific health state, the intercept, for a person with no complaints (ASAS HI=0), should be subtracted with the value or the aspects of health with problems. The example (*) illustrates the utility values for a patient with problems of pain, sleeping and standing.
ASAS HI, Assessment of SpondyloArthritis international Society Health Index; SpA, spondyloarthritis.