Table 6.

Overview of all feasibility aspects

Feasibility aspects	Percentage of agreement in the Delphi study (%)
Patient’s comprehensibility	97
Interpretability	95
Ease of administration	93
Length of the outcome measurement instrument	91
Completion time	91
Patient’s mental ability level	91
Ease of standardization	90
Clinician’s comprehensibility	90
Type of outcome measurement instrument	90
Cost of an outcome measurement instrument	89
Required equipment	88
Type of administration	87
Availability in different settings	86
Copyright	85
Patient’s physical ability level	85
Regulatory agency’s requirement for approval	84
Ease of score calculation	77