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Title: DSM-5 illness anxiety disorder and somatic symptom disorder: Comorbidity, correlates, and overlap with DSM-IV hypochondriasis
Contributor(s): Newby, Jill M (author); Hobbs, Megan J  (author)orcid ; Mahoney, Alison E J (author); Wong, Shiu (Kelvin) (author); Andrews, Gavin (author)
Publication Date: 2017-10
Early Online Version: 2017-07-23
DOI: 10.1016/j.jpsychores.2017.07.010
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Abstract: Objective: To investigate the reliability, validity and utility of DSM-5 illness anxiety disorder (IAD) and somatic symptom disorder (SSD), and explore their overlap with DSM-IV Hypochondriasis in a health anxious sample. Methods: Treatment-seeking patients with health anxiety (N = 118) completed structured diagnostic interviews to assess DSM-IV Hypochondriasis, DSM-5 IAD, SSD, and comorbid mental disorders, and completed self-report measures of health anxiety, comorbid symptoms, cognitions and behaviours, and service utilization. Results: IAD and SSD were more reliable diagnoses than Hypochondriasis (kappa estimates: IAD: 0.80, SSD: 0.92, Hypochondriasis: 0.60). 45% of patients were diagnosed with SSD, 47% with IAD, and 8% with comorbid IAD/SSD. Most patients with IAD fluctuated between seeking and avoiding care (61%), whereas care-seeking (25%) and care-avoidant subtypes were less common (14%). Half the sample met criteria for DSM-IV Hypochondriasis; of those, 56% met criteria for SSD criteria, 36% for IAD, and 8% for comorbid IAD/SSD. Compared to IAD, SSD was characterized by more severe health anxiety, somatic symptoms, depression, and higher health service use, and higher rates of major depressive disorder, panic disorder and agoraphobia. Conclusions: DSM-5 IAD and SSD classifications reliably detect more cases of clinically significant health anxiety than DSM-IV Hypochondriasis. The differences between IAD and SSD appear to be due to severity. Future research should explore the generalizability of these findings to other samples, and whether diagnostic status predicts treatment response and long-term outcome.
Publication Type: Journal Article
Grant Details: NHMRC/1037787
Source of Publication: Journal of Psychosomatic Research, v.101, p. 31-37
Publisher: Elsevier Inc
Place of Publication: United States of America
ISSN: 1879-1360
Field of Research (FoR) 2008: 110319 Psychiatry (incl. Psychotherapy)
111714 Mental Health
170106 Health, Clinical and Counselling Psychology
Field of Research (FoR) 2020: 320221 Psychiatry (incl. psychotherapy)
520303 Counselling psychology
520302 Clinical psychology
520304 Health psychology
Socio-Economic Objective (SEO) 2008: 920410 Mental Health
Socio-Economic Objective (SEO) 2020: 200409 Mental health
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article

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