Race moderates the impact of intolerance of uncertainty on mental health symptoms in Black and White community adults.

Racism increases the amount of uncertainty in daily life, which may differentially affect the mental health of individuals from racial minority groups who score high on trait intolerance of uncertainty (IU), or the tendency to experience uncertainty as highly aversive. We examined associations between trait IU and current symptoms of common mental disorders in community samples of Black (N = 125) and White (N = 125) adults ages 18-55 who were matched on age, gender, and educational attainment. Given that data were collected between 2017 and 2021, we also examined pandemic exposure as a moderator of these associations. No mean differences emerged between Black and White adults on trait IU measured with the Intolerance of Uncertainty Scale-12 or on current psychiatric symptoms assessed with the Structured Clinical Interview for DSM-5. Trait IU was more strongly associated with current psychiatric symptoms in Black than White adults, a racial difference that dissipated following pandemic exposure. Present results extend prior work by suggesting the dispositional tendency to find uncertainty aversive is a stronger predictor of mental health symptoms in Black than White adults outside the context of pandemic-related stress. Implications of these findings for understanding the impact of racial- and pandemic-related environmental uncertainty on mental health is discussed.