Paradox lost: explaining the Hispanic adult mortality advantage

Area of Science:

• Demography
• Epidemiology
• Sociology

Background:

• The "Hispanic mortality paradox" describes a survival advantage observed in Hispanic populations compared to non-Hispanic whites.
• Existing hypotheses include data artifacts, migration patterns, and socio-cultural buffering effects.

Purpose of the Study:

• To investigate the underlying causes of the adult Hispanic mortality paradox.
• To differentiate the mortality patterns among various Hispanic subgroups and assess contributing factors.

Main Methods:

• Utilized parametric hazard models.
• Analyzed nine years of mortality follow-up data.
• Examined competing hypotheses: data artifact, migration, and socio-cultural buffering.

Main Results:

• A "Hispanic" mortality advantage was identified exclusively among foreign-born Mexicans and other foreign-born Hispanics (excluding Cubans and Puerto Ricans).
• The mortality advantage for foreign-born Mexicans was attributed to return migration, also known as the "salmon-bias" effect.
• The mortality advantage for other foreign-born Hispanic groups could not be explained by the study's analyses.

Conclusions:

• The Hispanic mortality paradox is not a uniform phenomenon across all Hispanic subgroups.
• Return migration significantly explains the survival advantage in foreign-born Mexicans.
• Further research is needed to understand the mortality advantage in other foreign-born Hispanic populations.