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  • Title: Low vagal activity as mediating mechanism for the relationship between personality factors and gastric symptoms in functional dyspepsia.
    Author: Haug TT, Svebak S, Hausken T, Wilhelmsen I, Berstad A, Ursin H.
    Journal: Psychosom Med; 1994; 56(3):181-6. PubMed ID: 8084961.
    Abstract:
    Low vagal tone may represent a mediating mechanism for relationships between personality and symptoms of functional dyspepsia (FD) through a mechanism of antral hypomotility. Twenty-one patients with FD and seventeen healthy controls completed a series of personality tests before vagal and sympathetic activity, antral motility, and abdominal symptoms were assessed in response to a laboratory task. Functional dyspepsia patients had lower scores on vagal tone (p = .054) and motility index (p = .011) in addition to the expected higher scores on epigastric discomfort (p = .002). Psychological factors explained a substantial amount of the variance in vagal activity, antral motility, and reported symptoms. Symptoms were predicted by trait anxiety (STAI-TR), depression (BDI), and neuroticism (EPQ-N). Poor vagal tone was related to neuroticism (EPQ-N). Poor motility was best explained by task-related state dysphoria (SACL-STR).
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