Table 4.

Measurement properties for patient-reported outcomes from the COSMIN checklist [17] to be analysed in this study and analytic technique.

Measurement property	Analysed	Analytic technique
Content Validity	NA (criterion met through previous work [described in Part A])
Structural validity	Yes	Rasch analysis
Internal consistency	Yes	Rasch analysis - person separation index
Cross-cultural validity/measurement invariance	Yes	Rasch – differential item functioning
Measurement error	Yes	Standard error of measurement and smallest detectable change
Test-retest reliability	Yes	Intraclass correlation coefficient
Criterion validity	No (no gold standard for knowledge exists)
Hypothesis testing for construct validity	No (no appropriate comparator for knowledge exists)
Responsiveness	No (this study will not assess knowledge change over time)