Table 2.

Correlation of PBI with biological treatment‐relevant attributes, as defined in Box 2

Corresponding items
To be free of pain	3, 4
To be free of itching	3, 4
To no longer have burning sensations on your skin	3, 4
To be healed of all skin defects	3, 4
To be able to sleep better	3, 4
To feel less depressed	3, 4
To experience a greater enjoyment of life	3, 4
To have no fear that the disease will become worse	3, 4, 6
To be able to lead a normal everyday life	3, 4, 1, 7, 8, 2, 11, 12
To be more productive in everyday life	3, 4, 1
To be less of a burden to relatives and friends	3, 4
To be able to engage in normal leisure activities	3, 4
To be able to lead a normal working life	3, 4, 7, 8, 9
To be able to have more contact with other people	3, 4
To be comfortable showing yourself more in public	3, 4
To be less burdened in my partnership	3, 4, 7, 8, 12
To be able to have a normal sex life	3, 4
To be less dependent on doctor and clinical visits	3, 4, 1, 2, 7, 8, 9
To need less time for daily treatment	3, 4
To have fewer out‐of‐pocket treatment expenses	3, 4, 7, 8
To have fewer side‐effects	3, 4, 13
To find a clear diagnosis and therapy	3, 4
To have confidence in the therapy	3, 4, 5, 6, 10, 13

Items within the PBI were correlated with the biological treatment‐relevant attributes (numbered 1–13; Box 2) defined based on expert consensus.