Psychometric properties of the Anxiety Sensitivity Index-3 in adults with substance use disorders

Anxiety sensitivity, or the fear of anxiety-related sensations, has demonstrated relevance to a broad range of psychiatric conditions, including substance use disorders (SUDs). Anxiety sensitivity is typically measured through self-report instruments, most commonly the Anxiety Sensitivity Index-3 (ASI-3). Despite the widespread use of the ASI-3 in studies of SUDs, little is known about its psychometric properties within this population. Patients on an inpatient detoxification unit seeking treatment for SUDs (N = 1248) completed a battery of self-report measures, including the ASI-3. Psychometric properties of the ASI-3 were examined. An exploratory factor analysis with half of the sample (n = 624) supported a 3-factor structure corresponding to the ASI-3 subscales (Social Concerns, Cognitive Concerns, Physical Concerns). Confirmatory factor analysis was used to validate this 3-dimensional structure in a separate subsample (n = 624), resulting in adequate fit when testing a second-order hierarchical model. Internal consistency and convergent and discriminant validity results also supported the use of the ASI-3 in people with SUDs. Despite its widespread use in SUD research, this is the first psychometric investigation of the ASI-3 among individuals seeking treatment for SUDs.

Anxiety sensitivity: another reason to separate dental fears from blood-injury fears?

Although dental phobia is classified under the heading of blood-injury phobia, studies show differences between the two conditions in terms of frequency of fainting and gender distribution. Anxiety sensitivity (AS), which refers to discomfort and negative attributions to bodily anxiety sensations, was useful in differentiating panic anxiety from other phobic anxieties. No study has compared dental phobia with blood-injury phobia directly. We examined 61 subjects, working at a military aircraft factory, using measures on demographics, dental fears (MDAS - Modified Dental Anxiety Scale) and blood-injury fears (MBPI - Multidimensional Blood/Injury Phobia Inventory), in addition to Anxiety Sensitivity Index. Regression analyses revealed that dental phobia was predicted by ASI, whereas blood/injury phobia was not. Our results provide additional support for the proposed distinction between the two conditions.