Vulnerable Populations

Urinary phthalates and increased insulin resistance in adolescents

Urinary phthalates and increased insulin resistance in adolescents
Pediatrics. 2013 Sep;132(3):e646-55. doi: 10.1542/peds.2012-4022. Epub 2013 Aug 19.

Trasande L, Spanier AJ, Sathyanarayana S, Attina TM, Blustein J.
09/12/2013

BACKGROUND: Di-2-ethylhexylphthalate (DEHP) is an environmental chemical commonly found in processed foods. Phthalate exposures, in particular to DEHP, have been associated with insulin resistance in adults, but have not been studied in adolescents.

METHODS:

Using cross-sectional data from 766 fasting 12- to 19-year-olds in the 2003-2008 NHANES, we examined associations of phthalate metabolites with continuous and categorical measures of homeostatic model assessment of insulin resistance (HOMA-IR).

RESULTS:

Controlling for demographic and behavioral factors, diet, continuous age, BMI category, and urinary creatinine, for each log (roughly threefold) increase in DEHP metabolites, a 0.27 increase (95% confidence interval 0.14-0.40; P < .001) in HOMA-IR was identified. Compared with the first tertile of DEHP metabolite in the study population (14.5% insulin resistant), the third tertile had 21.6% prevalence (95% confidence interval 17.2%-26.0%; P = .02). Associations persisted despite controlling for bisphenol A, another endocrine-disrupting chemical commonly found in foods, and HOMA-IR and insulin resistance were not significantly associated with metabolites of lower molecular weight phthalates commonly found in cosmetics and other personal care products.

CONCLUSIONS:

Urinary DEHP concentrations were associated with increased insulin resistance in this cross-sectional study of adolescents. This study cannot rule out the possibility that insulin-resistant children ingest food with higher phthalate content, or that insulin-resistant children excrete more DEHP.

Scientific Publications on Firearms in Youth Before and After Congressional Action Prohibiting Federal Research Funding

Scientific Publications on Firearms in Youth Before and After Congressional Action Prohibiting Federal Research Funding
Journal of the American Medical Association [JAMA];310(5): 532-533.

Ladapo, Joseph, Benjamin Rodwin, Andrew M. Ryan, Leonardo Trasande, Jan Blustein
09/04/2013

In January 1996, Congress passed an appropriations bill amendment prohibiting the US Centers for Disease Control and Prevention (CDC) from using “funds made available for injury prevention … to advocate or promote gun control.” This provision was triggered by evidence linking gun ownership to health harms, created uncertainty among CDC officials and researchers about what could be studied, and led to significant declines in funding. We evaluated the change in the number of publications on firearms in youth compared with research on other leading causes of death before and after the Congressional action. We focused on children and adolescents because they disproportionately experience gun violence and injury.

Building Job Quality from the Inside-Out: Immigrants, Skill, and Jobs in the Construction Industry

Building Job Quality from the Inside-Out: Immigrants, Skill, and Jobs in the Construction Industry
Industrial Labor Relations Review. 66(4): 785-807.

Iskander, N. and N. Lowe
07/01/2013

Using an ethnographic case study of Mexican immigrant construction workers in two U.S. cities and in Mexico, the authors illustrate the contribution of immigrant skill as a resource for changing workplace practices. As a complement to explanations that situate the protection of job quality and the defense of skill to external institutions, the authors show that immigrants use collective learning practices to improve job quality from inside the work environment—that is to say from the inside-out. The authors also find that immigrants use collective skill-building practices to negotiate for improvements to their jobs; however, their ability to do so depends on the institutions that organize production locally. Particular attention is given to the quality of those industry institutions, noting that where they are more malleable, immigrant workers gain more latitude to alter their working conditions and their prospects for advancement.

Not Just for Poor Kids: The Impact of Universal Free School Breakfast on Meal Participation and Student Outcomes

Not Just for Poor Kids: The Impact of Universal Free School Breakfast on Meal Participation and Student Outcomes
Economics of Education Review, 36: 88-107

Leos-Urbel, J., Schwartz, A. E., Weinstein, M., & Corcoran, S.
06/18/2013

This paper examines the impact of the implementation of a universal free school breakfast policy on meals program participation, attendance, and academic achievement. In 2003, New York City made school breakfast free for all students regardless of income, while increasing the price of lunch for those ineligible for meal subsidies. Using a difference-indifference estimation strategy, we derive plausibly causal estimates of the policy’s impact by exploiting within and between group variation in school meal pricing before and after the policy change. Our estimates suggest that the policy resulted in small increases in breakfast participation both for students who experienced a decrease in the price of breakfast and for free-lunch eligible students who experienced no price change. The latter suggests that universal provision may alter behavior through mechanisms other than price, highlighting the potential merits of universal provision over targeted services. We find limited evidence of policy impacts on academic outcomes.

Racial Dynamics of Subprime Mortgage Lending at the Peak

Racial Dynamics of Subprime Mortgage Lending at the Peak
Faber, Jacob W. 2013. “Racial Dynamics of Subprime Mortgage Lending at the Peak.” Housing Policy Debate, 23(2): 328-349.

Faber, Jacob William
04/24/2013

Subprime mortgage lending in the early 2000s was a leading cause of the Great Recession. From 2003 to 2006, subprime loans jumped from 7.6% of the mortgage market to 20.1%, with black and Latino borrowers receiving a disproportionate share. This article leveraged the Home Mortgage Disclosure Act data and multinomial regression to model home-purchase mortgage lending in 2006, the peak of the housing boom. The findings expose a complicated story of race and income. Consistent with previous research, blacks and Latinos were more likely and Asians less likely to receive subprime loans than whites were. Income was positively associated with receipt of subprime loans for minorities, whereas the opposite was true for whites. When expensive (jumbo) loans were excluded from the sample, regressions found an even stronger, positive association between income and subprime likelihood for minorities, supporting the theory that wealthier minorities were targeted for subprime loans when they could have qualified for prime loans. This finding also provides another example of an aspect of American life in which minorities are unable to leverage higher class position in the same way as whites are. Contrary to previous research, model estimates did not find that borrowers paid a penalty (in increased likelihood of subprime outcome) for buying homes in minority communities.

Race/Ethnicity-Specific Associations of Urinary Phthalates with Childhood Body Mass in a Nationally Representative Sample

Race/Ethnicity-Specific Associations of Urinary Phthalates with Childhood Body Mass in a Nationally Representative Sample
Environmental Health Perspectives. 121:501-506.

Trasande, Leonardo, Teresa M Attina, S Sathyanarayana, Adam J Spanier, Jan Blustein.
04/01/2013

Background: Phthalates have antiandrogenic effects and may disrupt lipid and carbohydrate metabolism. Racial/ethnic subpopulations have been documented to have varying urinary phthalate concentrations and prevalences of childhood obesity.

Objective: We examined associations between urinary phthalate metabolites and body mass outcomes in a nationally representative sample of U.S. children and adolescents.

Methods: We performed stratified and whole-sample cross-sectional analyses of 2,884 children 6–19 years of age who participated in the 2003–2008 National Health and Nutrition Examination Survey. Multivariable linear and logistic analyses of body mass index z-score, overweight, and obesity were performed against molar concentrations of low-molecular-weight (LMW), high-molecular-weight (HMW), and di-2-ethylhexylphthalate (DEHP) metabolites, controlling for sex, television watching, caregiver education, caloric intake, poverty–income ratio, race/ethnicity, serum cotinine, and age group. We used sensitivity analysis to examine robustness of results to removing sample weighting, normalizing phthalate concentrations for molecular weight, and examining different dietary intake covariates.

Results: In stratified, multivariable models, each log unit (roughly 3-fold) increase in LMW metabolites was associated with 21% and 22% increases in odds (95% CI: 1.05–1.39 and 1.07–1.39, respectively) of overweight and obesity, and a 0.090-SD unit increase in BMI z-score (95% CI: 0.003–0.18), among non-Hispanic blacks. Significant associations were not identified in any other racial/ethnic subgroup or in the study sample as a whole after controlling for potential confounders, associations were not significant for HMW or DEHP metabolites, and results did not change substantially with sensitivity analysis.

Conclusions: We identified a race/ethnicity–specific association of phthalates with childhood obesity in a nationally representative sample. Further study is needed to corroborate the association and evaluate genetic/epigenomic predisposition and/or increased phthalate exposure as possible explanations for differences among racial/ethnic subgroups.

Environmental and individual factors affecting menu labeling utilization: a qualitative research study

Environmental and individual factors affecting menu labeling utilization: a qualitative research study
Journal of the Academy of Nutrition and Dietetics. 2013 May;113(5):667-72. doi: 10.1016/j.jand.2012.11.011. Epub 2013 Feb 9.

Jennifer Schindler, Kamila Kiszko, Courtney Abrams, Nadia Islam, Brian Elbel
02/09/2013

Obesity is a prominent public health concern that disproportionally affects low-income and minority populations. Recent policies mandating the posting of calories on menus in fast-food chain restaurants have not proven to uniformly influence food choice. This qualitative research study used focus groups to study individual and environmental factors affecting the use of these menu labels among low-income minority populations. Ten focus groups targeting low-income residents (n=105) were held at various community organizations throughout New York City over a 9-month period in 2011. The focus groups were conducted in Spanish, English, or a combination of both languages. In late 2011 and early 2012, transcripts were coded through the process of thematic analysis using Atlas.ti for naturally emerging themes, influences, and determinants of food choice. Few participants used menu labels, despite awareness. The most frequently cited as barriers to menu label use included: price and time constraints, confusion and lack of understanding about caloric values, as well as the priority of preference, hunger, and habitual ordering habits. Based on the individual and external influences on food choice that often take priority over calorie consideration, a modified approach may be necessary to make menu labels more effective and user-friendly.

Access to primary care in Hong Kong, Greater London and New York City

Access to primary care in Hong Kong, Greater London and New York City
Health Economics, Policy and Law; 8(1): 95-109.

Chau, PH. Woo, J. Gusmano, MK. Weisz, D. Rodwin, VG. and Chan, KC.
01/01/2013

We investigate avoidable hospital conditions (AHC) in three world cities as a way to assess access to primary care. Residents of Hong Kong are healthier than their counterparts in Greater London or New York City. In contrast to their counterparts in New York City, residents of both Greater London and Hong Kong face no financial barriers to an extensive public hospital system. We compare residence-based hospital discharge rates for AHC, by age cohorts, in these cities and find that New York City has higher rates than Hong Kong and Greater London. Hong Kong has the lowest hospital discharge rates for AHC among the population 15–64, but its rates are nearly as high as those in New York City among the population 65 and over. Our findings suggest that in contrast to Greater London, older residents in Hong Kong and New York face significant barriers in accessing primary care. In all three cities, people living in lower socioeconomic status neighborhoods are more likely to be hospitalized for an AHC, but neighborhood inequalities are greater in Hong Kong and New York than in Greater London.

How Microfinance Really Works

How Microfinance Really Works
The Milken Institute Review

Morduch, Jonathan
01/01/2013

About half of the world’s adults lack bank accounts. Most of these “unbanked” are deemed too expensive to serve, or not worth the hassle created by banking regulations. But what may be good business from a banker’s perspective isn’t necessarily what’s best for society. The inequalities that persist in financial access reinforce broader inequalities in the distribution of income and wealth. This is the opening for microfinance and also its challenge. Microlending has been sold as a practical means to get capital into the hands of small-scale entrepreneurs who can then earn their way out of poverty. The idea appeals to our impulse to help people help themselves and to our conviction that bottom-up development depends on the embrace of the market. By eschewing governments and traditional charities, the sector promises to sidestep the bureaucracy and inertia that have hobbled other attempts to expand the opportunities of the poor.

Beyond Black: Diversity among Black Immigrant Students in New York City Public Schools

Beyond Black: Diversity among Black Immigrant Students in New York City Public Schools
Randy Capps and Michael Fix, editors, Young Children of Black Immigrants in America: Changing Flows, Changing Faces. Washington, DC: Migration Policy Institute: 299-331

Doucet, F., Schwartz, A. E., & Debraggio, E.
12/14/2012

The child population in the United States is rapidly changing and diversifying — in large part because of immigration. Today, nearly one in four US children under the age of 18 is the child of an immigrant. While research has focused on the largest of these groups (Latinos and Asians), far less academic attention has been paid to the changing Black child population, with the children of Black immigrants representing an increasing share of the US Black child population.

To better understand a unique segment of the child population, chapters in this interdisciplinary volume examine the health, well-being, school readiness, and academic achievement of children in Black immigrant families (most with parents from Africa and the Caribbean).

The volume explores the migration and settlement experiences of Black immigrants to the United States, focusing on contextual factors such as family circumstances, parenting behaviors, social supports, and school climate that influence outcomes during early childhood and the elementary and middle-school years.  Many of its findings hold important policy implications for education, health care, child care, early childhood development, immigrant integration, and refugee assistance.

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