Why carry out this study?

To assess the psychometric properties of the ILQI and confirm the scoring cut-offs, in order to evaluate the reliability and validity of scores and demonstrate that ILQI is appropriate for measuring the impact of ITP on HRQoL in clinical practice.

What did the study ask? What was the hypothesis of the study?

Hypothesis was that the ILQI had already demonstrated good content validity and developers wanted to assess the psychometric validity, to further support appropriateness for use in clinical practice.

What were the study outcomes/conclusions?

Psychometric evaluation demonstrates that the ILQI is fit for measuring the impact of ITP on quality of life.

What has been learned from the study?

ILQI is a valid and reliable PRO measure of quality of life in patients with ITP.