Table 2.
Domain item number | Item | UK (logit) | USA (logit) |
---|---|---|---|
Cough 6* | My cough disrupts my life | 0.51 | ✓0.83 |
Mortality 27† | I often worry about how I might die | −0.16 | ✓0.56 |
Mortality 32† | I am afraid of being maintained at a poor quality of life | −1.01 | ✓0.13 |
Energy 37* | My level of physical energy makes me feel like I am lazy | 0.44 | ✓0.69 |
Mental 39† | I feel weighed down by IPF | ✓0.39 | −0.12 |
Finances 58* | I am concerned that the cost of my care will use up my family's financial resources | −0.71 | ✓0.61 |
Finances 61† | Having IPF has forced me to reconsider my financial goals | ✓0.50 | 0.02 |
Finances 62* | It has been difficult for me to make the necessary adjustments in my finances to provide support for my finances | ✓0.85 | 0.75 |
Independence 4† | I occasionally ask for help to do things now that six months ago I could have done myself | −1.35 | ✓−0.38 |
Relations 76† | Living with IPF puts a strain on the relationship I have with member of my immediate family | ✓0.39 | 0.17 |
Relations 80† | I am less willing to seek and form new relationships because I have IPF | −1.25 | ✓−0.81 |
✓=Less likely to respond ‘Strongly Agree’ to the item.
†Uniform differential item functioning.
*Non-uniform differential item functioning.