Tens of millions of individuals around the world use decentralized content distribution systems, a fact of growing social, economic, and technological importance. These sharing systems are poorly understood because, unlike in other technosocial systems, it is difficult to gather large-scale data about user behavior. Here, we investigate user activity patterns and the socioeconomic factors that ...

BACKGROUND Life-course socioeconomic factors may have a role in dementia aetiology but there is a current paucity of studies. Meta-analyses of individual participant data would considerably strengthen this evidence base. AIMS To examine the association between socioeconomic status in early life and adulthood with later dementia death. METHOD Individual participant meta-analysis of 11 prospe...

PURPOSE Early detection and intervention for developmental dysplasia of the hip (DDH) is important for normal hip development. Previous studies have shown disparities in access to paediatric specialty care among different racial and socioeconomic backgrounds. This study aims to identify whether these factors are related to timely referral for infants with DDH. METHODS A retrospective cohort s...

OBJECTIVES To explore whether health care, socioeconomic, or personal characteristics account for disparities observed in the utilization of vasectomy. More than 500,000 vasectomies are performed annually in the United States. The safety and efficacy of vasectomy make it a good family planning option, yet the factors related to use of male surgical sterilization are not well understood. In this...

Despite Medicare coverage, receipt of clinical preventive services is suboptimal. Using multivariate regression analyses and Medicare Current Beneficiary Survey (MCBS) data for 2001, we estimated the relationship between the number of preventive services received in the 12-month recall period and: socioeconomics, plan type, health status, health risks, and ability to address daily needs. Result...

OBJECTIVE To estimate changes in self-report and treatment of diabetes and hypertension between 2001 and 2012 among Mexican aged 50-80, assessing the contribution of education and health insurance coverage. MATERIALS AND METHODS The Mexican Health and Aging Study was used to estimate associations of education and insurance on prevalence and treatment of diabetes and hypertension in 2001 and 2...

BACKGROUND Obesity may cluster in families due to shared physical and social environments. PURPOSE This study aims to identify family typologies of obesity risk based on family environments. METHODS Using 2007-2008 data from 706 parent/youth dyads in Minnesota, we applied latent profile analysis and general linear models to evaluate associations between family typologies and body mass index...

Socioeconomic status has a robust positive relationship with several health outcomes at the individual and population levels, but in the case of HIV prevalence, income inequality may be a better predictor than absolute level of income. Most studies showing a relationship between income inequality and HIV have used entire countries as the unit of analysis. In this study, we examine the associati...

BACKGROUND Immigrants often encounter barriers in the health system that may affect their health care outcomes. In order to better cater to the needs of immigrants, many health care institutions have increased their efforts in recent years to provide services which are more sensitive to the needs of an increasingly diverse population. Little is known about whether these efforts are successful. ...

The authors tested the evolutionary genetic hypothesis that the functional form of an asymmetrically risky Gene × Environment interaction will differ as a function of age-related antagonistic pleiotropy (i.e., show opposite effects in young vs. old individuals). Previous studies have identified a polymorphism in the human IL6 promoter (rs1800795; IL6-74 G/C) that interacts with adverse socioenv...