Table 1.

The 5-item EQ-5D questionnaire (Source:[22])

Mobility
I have no problems in walking about	□
I have some problems in walking about	□
I am confined to bed	□
Self-care
I have no problems with self-care	□
I have some problems washing or dressing myself	□
I am unable to wash or dress myself	□
Usual activities (e.g. work, study, housework, family or leisure activities)
I have no problems with performing my usual activities	□
I have some problems with performing my usual activities	□
I am unable to perform my usual activities	□
Pain/discomfort
I have no pain or discomfort	□
I have moderate pain or discomfort	□
I have extreme pain or discomfort	□
Anxiety/depression
I am not anxious or depressed	□
I am moderately anxious or depressed	□
I am extremely anxious or depressed	□