Symptom Attributions in Illness Anxiety Disorder

A major characteristic of health anxiety is the tendency to attribute benign bodily sensations to serious illnesses. This has been supported by empirical research in non-clinical samples, and samples of individuals diagnosed with Hypochondriasis. However, no study to date has explored symptom attribution styles of individuals with the DSM-5 diagnosis of Illness Anxiety Disorder.

Sixty-one participants, including a clinical Illness Anxiety Disorder (n = 35) and healthy control (n = 26) sample, completed self-report measures of health anxiety and an Attribution Task, whereby they were presented with eight common bodily sensations and asked to generate possible explanations for them.

Results showed that relative to healthy controls, participants with Illness Anxiety Disorder overall were more likely to make more serious, 'catastrophic' somatic attributions to symptoms, and less likely to generate non-threatening normalising explanations. These results also extended to their initial attributions, conceptualised as the 'jumping to conclusions' bias, and as an exploratory index of flexibility, they were also found to make less attributions overall compared to healthy controls.

Findings provide support for the cognitive behavioural theory of health anxiety, and highlight the importance of assessing and addressing symptom attributions with clients with illness anxiety disorder.