Neighbourhoods and homicide mortality: an analysis of race/ethnic differences.

Objective: To examine whether measures of neighbourhood economic deprivation, social disorganisation, and acculturation explain homicide mortality differentials between Mexican Americans, non-Hispanic black Americans, and non-Hispanic white Americans, net of individual factors.

Methods: Prospective study, National Health Interview Survey (1986-1994) linked to subsequent mortality in the National Death Index (1986-1997). Methods: United States of America. Methods: A nationally representative sample of non-institutionalised Mexican Americans, non-Hispanic black Americans, and non-Hispanic white Americans, aged 18-50 at the point of interview. Methods: Cox proportional hazard models estimate the risk of death associated with various neighbourhood and individual factors.

Results: Both individual and neighbourhood risk factors partially account for race/ethnic disparities in homicide. Homicide mortality risks are between 20% and 50% higher for residents of areas that have economic inequality of 0.50 or greater based on the coefficient of variation, or where 4% or more of the residents are Mexican American, 10% or more of the residents are non-Hispanic black, or 20% or more of the households are headed by single parents (p< or = 0.05). But residents of areas where 10% or more of their neighbours are foreign born have 35% lower mortality risks than people living in areas with fewer foreign born people (p< or =0.05). These differences persist even after controlling for individual level risk factors.

Conclusions: The findings support economic deprivation, social disorganisation, and acculturation theories, and suggest that both neighbourhood and individual risk factors affect race/ethnic differences in homicide mortality. Public health policies must focus on both individual and neighbourhood factors to reduce homicide risks in vulnerable populations.