Hypochondriasis Linked to Increased Risk for All-Cause Mortality

TOPLINE:

Hypochondriasis is linked to an 84% higher risk for death for those with the disorder and a fourfold increased risk for suicide, new population-based data show. These findings, investigators noted, suggest the need for more clinical screening and treatment of hypochondriasis, also known as health anxiety disorder.

METHODOLOGY:

• Investigators used several Swedish population-based registers to identify people who received a diagnosis of hypochondriasis between January 1997 and December 2020.
• Each individual diagnosed with hypochondriasis (n = 4129; 2342 women; median 34.5 years at diagnosis) was age- and sex-matched with 10 individuals without the disorder (n = 41,290).
• For those who died during the study period, cause of death was categorized as natural (neoplasms; diseases of the nervous system, circulatory system, or respiratory system) or unnatural (primarily suicide).
• Investigators age- and sex-matched 4129 individuals with hypochondriasis to 41,290 individuals without hypochondriasis.

TAKEAWAY:

• Individuals with hypochondriasis had an 84% higher risk for all-cause mortality during the study period than those without it (adjusted hazard ratio [aHR], 1.84; 95% CI, 1.60-2.10), including a higher risk for both natural (aHR, 1.60; 95% CI, 1.38-1.85) and unnatural death (aHR, 2.43; 95% CI, 1.61-3.68).
• The majority of individuals with hypochondriasis were diagnosed with at least one additional psychiatric disorder (primarily anxiety-related and depressive disorders) vs the group without hypochondriasis (86% vs 20%, respectively; P < .001).
• The risk for suicide — the most common unnatural cause of death — was four times higher in those with hypochondriasis (aHR, 4.14; 95% CI, 2.44-7.03).
• When investigators limited analyses to include only psychiatric comorbidities recorded before the first diagnosis of hypochondriasis, suicide risk was attenuated but remained statistically significant.

IN PRACTICE:

“Taken together, these findings illustrate a paradox, whereby individuals with hypochondriasis have an increased risk for death despite their pervasive fears of illness and death. In this study, most deaths could be classified as potentially preventable. Dismissing these individuals’ somatic symptoms as imaginary may have dire consequences,” the authors wrote.

SOURCE:

David Mataix-Cols, PhD, of the Karolinska Institutet, Stockholm, Sweden, led the study, which was published online on December 13, 2023, in JAMA Psychiatry.

LIMITATIONS:

Hypochondriasis is thought to be underdiagnosed in Sweden, with only approximately 4000 cases registered within two decades. Study investigators also noted that they did not obtain data from primary care, the setting where the majority of hypochondriasis cases are diagnosed.

DISCLOSURES:

The study was funded by the Swedish Research Council for Health, Working Life and Welfare, Stockholm; the Swedish Society of Medicine, Stockholm; and Karolinska Institutet, Stockholm. Dr. Mataix-Cols reported receiving personal fees from UpToDate Inc. Author disclosures can be found in the original article.

A version of this article appeared on Medscape.com.