Psychometric evaluation of the Dutch version of the patient-reported experience measure for addiction treatment (PREMAT-NL).

Introduction: Patient-centred care has become increasingly important in health care. Patient-reported experience measures (PREM) are used to measure patient experiences in health care, but the availability of psychometrically validated PREMs is limited. The Patient Reported Experience Measure in Addiction Treatment (PREMAT) is a PREM developed with extensive service user input to assess the experiences of people in residential addiction treatment services. In this study we aimed to evaluate the psychometric properties of the Dutch translation of the PREMAT, the PREMAT-NL.

Methods: Ninety-three participants completed the PREMAT-NL approximately 45 days after starting addiction treatment as part of a naturalistic prospective multi-centre study in Belgium. We examined the factorial structure using principal component analysis with Promax oblique rotation and assessed the internal consistencies of the subscales and total score using Cronbach's α. Additionally, we explored the relationship of PREMAT-NL scores with demographic and clinical variables.

Results: The PREMAT-NL had a four-factor structure, with good internal consistencies of the subscales (Cronbach's α >0.70) and excellent internal consistency of the total score (Cronbach's α = 0.94). The PREMAT-NL total score was negatively skewed, and four score categories were proposed based on z-scores. PREMAT-NL scores correlated weakly with the type of treatment centre (r = 0.21, p < 0.05) and with previously received treatment for addiction (r = -0.25, p < 0.05).

Discussion And Conclusions: Although the factor structure and thus the appropriate use of subscales need further investigation, the findings of this study support the use of the PREMAT-NL total score as a valid and reliable PREM to evaluate residential addiction treatment services.