Psychometric properties and reference values of the Patient‐Reported Outcomes Measurement Information System ( PROMIS) sleep item banks in the Dutch general population

Summary Psychometric properties of the v1.0 Patient‐Reported Outcomes Measurement Information System (PROMIS®) sleep disturbance (27 items) and sleep‐related impairment (SRI; 16 items) item banks, short forms derived from the item bank, and simulated computerised adaptive test (CAT), were assessed in a representative sample of 1,006 adults from the Dutch general population. For sleep disturbance all items fitted the item response theory model. Four items showed differential item functioning (i.e., lack of measurement invariance) for age and two for language but the impact on scores (expressed... Mehr ...