In this study we scrutinize prevalence of current smoking and binge drinking among adult US immigrants, and examine whether age at migration predicts these two behaviors and moderates the effect of length of residence. Immigrant groups include those from Latin America/Caribbean, East and South Asia, Sub-Saharan Africa, Europe/Central Asia, and Middle East/North Africa. Multivariate logistic regressions are estimated using cross-sectional data from the New Immigrant Survey (N = 7,397). Results show that patterns of smoking and binge drinking vary by gender and by region of origins. In addition, arriving at age 0-9 are directly associated with higher odds of binge drinking among adult women. Among adult men, age at migration moderates the association between length of residence and substance use. Specifically, length of residence has more detrimental effects for adolescent immigrants (arriving at age 10-18) on smoking, while its detrimental effects are more pronounced for childhood immigrants (arriving at age 0-9) on binge drinking. We interpret our findings within the critical period model in epidemiological research, concluding that adolescence and childhood are critical life stages that are associated with differential effects of length of residence when looking at smoking and binge drinking among immigrant men.

Evidence has shown that racial-ethnic minorities in the U.S. are less likely than whites to engage in leisure-time physical activity (LTPA); yet few studies to date have included Asian subgroups in the analyses and mechanisms underlying these disparities are not well-known. This study uses data from the 2007 California Health Interview Survey (N=37,164) to examine racial-ethnic disparities in self-reported adherence to LTPA recommendations and explore the mediating roles of socioeconomic status (SES), acculturation, and neighborhood perceptions. Nine racial-ethnic groups were included: non-Hispanic whites, non-Hispanic blacks, Mexicans, and six largest Asian subgroups. Results confirm that racial-ethnic minorities are, in general, less likely than whites to meet LTPA recommendations, whereas heterogeneity is also evident across Asian subgroups. No significant disparity is revealed for the Japanese and Filipinos but whites are advantaged compared to all other Asian groups. Educational attainment, percent of lifetime spent in the U.S., and access to park, playground, or open space are significantly associated with meeting the LTPA recommendations. SES and acculturation play differential roles in explaining group disparities for blacks, Mexicans, and some Asian subgroups. Perceived neighborhood environment does not mediate LTPA disparities by race-ethnicity. Net of these mediators, the advantages of whites in meeting LTPA recommendations persist for blacks, Mexicans, the Chinese, and Koreans. Future research should theorize and operationalize additional multilevel pathways linking race-ethnicity and LTPA while assessing measurement errors in the existing constructs.

ObjectivesTo analyze if the association between obesity and neighborhood socioeconomic status (SES) was moderated by gender and family income.MethodsData from 19,448 individuals 18 and older from the 2001–2008 National Health and Nutrition Examination Survey (NHANES) were geo-matched with social and built environment characteristics from the 2000 Census and other data sources. Objective height and weight measures were used to create body mass index (BMI) and obese status (BMI≥30). Tracts were divided into four quartiles using a composite factor score capturing neighborhood SES. Individuals were divided into four income groups by the income-to-poverty ratio (I/P). Multilevel regression analyses were performed.ResultsThe association between neighborhood SES and obesity/BMI was more consistently significant among higher-income women than lower-income women. The same association was not found for men. Neighborhood built environment factors did not mediate the relationship between neighborhood SES and individual weight outcome.ConclusionsNeighborhood SES had stronger and more consistent associations with obesity and BMI for women than men, and for higher-income women than lower-income women.

This study investigates the association between neighborhood racial composition and adult obesity risks by race and gender, and explores whether neighborhood social and built environment mediates the observed protective or detrimental effects of racial composition on obesity risks. Cross-sectional data from the 2006 and 2008 Southeastern Pennsylvania Household Health Survey are merged with census-tract profiles from 2005–2009 American Community Survey and Geographic Information System-based built-environment data. The analytical sample includes 12,730 whites and 4,290 blacks residing in 953 census tracts. Results from multilevel analysis suggest that black concentration is associated with higher obesity risks only for white women, and this association is mediated by lower neighborhood social cohesion and socioeconomic status (SES) in black-concentrated neighborhoods. After controlling for neighborhood SES, black concentration and street connectivity are associated with lower obesity risks for white men. No association between black concentration and obesity is found for blacks. The findings point to the intersections of race and gender in neighborhood effects on obesity risks, and highlight the importance of various aspects of neighborhood social and built environment and their complex roles in obesity prevention by socio-demographic groups.

Whether minority concentration in a neighborhood exposes residents to or protects them from health risks has generated burgeoning scholarly interests, yet endogeneity as a result of neighborhood selection largely remains unclear in the literature. This study addresses such endogeneity and simultaneously investigates the roles of co-ethnic density and immigrant enclaves in influencing high blood pressure and high cholesterol level among Latinos, the largest minority group in the United States. Pooled cross-sectional data that included both native and foreign-born Latinos of Puerto Rican, Mexican, and other origins (N=1,563) from the 2006 and 2008 Southeastern Pennsylvania Household Health Survey were linked to census-tract profiles from the 2005–2009 American Community Survey. Results from both multilevel regression and propensity score matching analysis confirmed the deleterious effect of residential co-ethnic density on Latino adults’ health risks over and above individual risk factors. We also found selection bias associated with the observed protective effect of immigrant concentration, which is likely a result of residential preference.