Table 2.

Modified version of COSMIN checklist

Psychometric qualities	Description
Conceptual framework	All papers were examined to determine what details were presented about the constructs included within the measure
Reliability	Papers were explored to determine what reliability tests had been conducted including inter-item correlations, test–retest reliability and internal consistency
Content validity	Papers were explored to determine what level of construct validity in the form of interviews or focus groups had been conducted during the questionnaire development stages
Construct validity	Construct validity including whether the questionnaires could differentiate between particular clinical or demographic groups was explored
Clinical relevance of score changes	All data referring to the tool’s ability to detect changes over time were collected