DecidHealth: Psychometric validation of the IUS-12 and IUS-12-H scales on French healthcare professionals

Literature shows that intolerance of uncertainty can negatively affect the medical decision-making process of healthcare professionals. However, there are no tools for measuring intolerance of uncertainty in French, so this study aimed to validate the Intolerance of Uncertainty Scale-12 (IUS-12) in French, and a version of the IUS-12 adapted for healthcare professionals (IUS-12-H). We asked health professionals to complete our two scales of interest, as well as several scales covering similar constructs (e.g. stress, emotional regulation problems) and different constructs (e.g. need for cognition) to assess the convergent and divergent validity of our scales (PRU, DTS, DIS, PSS10, DERS-16, QIT, NFCO, NFC and TAMSAD). Five hundred and sixteen healthcare professionals completed French versions of the IUS-12 and the IUS-12-H, and our additional scales. Exploratory factor analyses showed that the IUS-12 and IUS-12-H scales had a correlated two-factor structure as in the seminal article of Carleton et al. (2007). The IUS-12 and the IUS-11-H French versions show comparable psychometric properties to the original version, suggesting that they can be used as seminal scales for French healthcare professionals.