Validity and reliability of the Dutch version of the S3-NIV questionnaire to evaluate long-term noninvasive ventilation.

Objectives: Noninvasive ventilation (NIV) is an effective treatment for chronic respiratory failure (CRF). Patient-centered outcomes need to be evaluated regularly and the S-NIV questionnaire seems an applicable tool. We translated this short, self-administered questionnaire into a Dutch version and tested its construct validity and reliability.