Rumination as a Mediator Between Intolerance of Uncertainty and Online Health Anxiety, Moderated by Medical History

OBJECTIVE: We examined the psychological mechanisms underlying cyberchondria by testing whether rumination mediates the association between intolerance of uncertainty and cyberchondria and whether this indirect effect is moderated by prior medical experiences and perceived access to healthcare. METHODS AND MEASURES: A cross-sectional design was employed with a non-clinical sample of 96 Romanian adults. Participants completed validated self-report measures of intolerance of uncertainty (IUS-12), rumination (Ruminative Responses Scale), and cyberchondria (Cyberchondria Severity Scale). Additional items assessed medical history and perceived access to healthcare. Moderated mediation analyses with bootstrapped confidence intervals were conducted, controlling for relevant sociodemographic variables. RESULTS: Higher intolerance of uncertainty was associated with higher cyberchondria both directly and indirectly through rumination, which accounted for more than half of the total effect. The rumination-cyberchondria association, and the indirect effect of IU, were significantly stronger among individuals who had experienced a recent acute medical episode, whereas chronic illness did not significantly moderate this pathway. Cyberchondria levels were lowest among participants reporting very good access to healthcare. CONCLUSIONS: Cyberchondria appears to arise from the interaction of intolerance of uncertainty, ruminative thinking, and contextual health experiences. Targeting rumination and uncertainty tolerance may be particularly important following acute medical events.