Testing a somatization hypothesis to explain the Black-White depression paradox.

Area of Science:

• Psychiatry
• Epidemiology
• Sociology

Background:

• Epidemiologic studies indicate lower major depression prevalence in Black than White populations in the U.S.
• Social stress theory suggests this disparity is paradoxical.
• A clinical hypothesis posits that Black individuals express depression somatically more than White individuals, potentially leading to underdiagnosis.

Purpose of the Study:

• To investigate if Black individuals express depression somatically more than White individuals.
• To determine if greater somatization in Black individuals reduces their likelihood of endorsing psychological screening symptoms.
• To test if somatization explains the lower reported depression rates in Black populations.

Main Methods:

• Utilized cross-sectional data from the National Longitudinal Alcohol Epidemiologic Survey (n=42,862).
• Included Black and White participants who endorsed at least one past-12-month depression symptom.
• Compared groups on depression somatization and its impact on screening symptom endorsement.

Main Results:

• Black individuals had higher mean depression somatization scores than White individuals (p=0.03).
• This difference was small, driven by specific somatic and psychological symptom endorsements.
• Black and White individuals had similar odds of endorsing screening symptoms, even after adjusting for somatization.

Conclusions:

• Found minimal evidence supporting the hypothesis that Black individuals express depression more somatically than White individuals.
• The observed small difference in somatization did not inhibit the endorsement of depression screening symptoms among Black individuals.
• The findings do not resolve the Black-White depression paradox.