Differences in Risky Sexual Behavior According to Sexual Orientation in Korean Adolescents

Adolescents in sexual minority groups are known to be at risk of contracting sexually transmitted diseases through risky sexual behavior. However, few studies have examined associations between sexual orientation and risky sexual behavior and sexually transmitted diseases in Korean adolescents. Therefore, this cross-sectional study used raw data from the Tenth Korea Youth Risk Behavior Web-Based Survey to explore these relationships. Logistic regression analyses were performed to examine the associations between risky sexual behavior and sexual orientation in adolescents. The participants were 6,884 adolescents who provided data regarding demographic characteristics, sexual orientation, and risky sexual behavior. The proportions of homosexual and bisexual subjects who used condoms, engaged in sexual intercourse after drinking alcohol, and experienced sexually transmitted diseases were higher relative to those of heterosexual subjects. Associations between homosexuality and bisexuality and sexually transmitted diseases and engagement in sexual intercourse after drinking remained after multivariate adjustment. Interventions to prevent risky sexual behavior should target sexual orientation, to improve sexual health and prevent sexually transmitted disease in homosexual and bisexual adolescents.     

Statistical methods for handling missing data to align with treatment policy strategy

The International Council for Harmonization (ICH) E9(R1) addendum recommends choosing an appropriate estimand based on the study objectives in advance of trial design. One defining attribute of an estimand is the intercurrent event, specifically what is considered an intercurrent event and how it should be handled. The primary objective of a clinical study is usually to assess a product's effectiveness and safety based on the planned treatment regimen instead of the actual treatment received. The estimand using the treatment policy strategy, which collects and analyzes data regardless of the occurrence of intercurrent events, is usually utilized. In this article, we explain how missing data can be handled using the treatment policy strategy from the authors' viewpoint in connection with antihyperglycemic product development programs. The article discusses five statistical methods to impute missing data occurring after intercurrent events. All five methods are applied within the framework of the treatment policy strategy. The article compares the five methods via Markov Chain Monte Carlo simulations and showcases how three of these five methods have been applied to estimate the treatment effects published in the labels for three antihyperglycemic agents currently on the market.     

The Bullwhip Effect—Impact of Stochastic Lead Time,Information Quality,and Information Sharing: A Simulation Study

We use a simulation model called ‘SISCO’ to examine the effects in supply chains of stochastic lead times and of information sharing and quality of that information in a periodic order‐up‐to level inventory system. We test the accuracy of the simulation by verifying the results in Chen et al. (2000a) and Dejonckheere et al. (2004). We find that lead‐time variability exacerbates variance amplification in a supply chain, and that information sharing and information quality are highly significant. For example, using the assumptions in Chen et al. (2000a) and Dejonckheere et al. (2004), we find in a numerical experiment of a customer‐retailer‐wholesaler‐distributor‐factory supply chain that variance amplification is attenuated by nearly 50 percent at the factory due to information sharing. Other assumptions we make are based on interviews or conversations with managers at large supply chains.     

中、韩企业投资税收扶持制度的比较

企业投资左右着一个国家经济的成长。现在,韩国企业的国内投资明显减少已成为迫在眉睫的问题。本文将以影响企业(设备)投资的各种因素中的税收和税收扶持制度为中心进行研究。本文认为,虽然税收和税收扶持制度不是企业在决定投资地点时的重要因素,但分析在日趋白热化的东北亚地区的竞争中,韩国和中国的税收和税收扶持制度在投资时所起的作用却也不无意义。     

A Latent Class Analysis of Factors Associated with Levels of Aggression among Low-Income African American Youth in Chicago

Abstract

African American youth are often stereotyped as being more aggressive than and experience more severe negative social sanctions relative to their European American peers. This cross-sectional study assessed self-reported levels of aggression among a sample of 538 low-income African American youth in Chicago, and employed latent class analysis to determine groups of aggression. Major study findings showed low, middle high aggression group. The largest number of youth fell within the low aggression group. Social factors (e.g., low student-teacher connectedness, high risky peer norms, neighborhood violence, and family conflict) were associated with inclusion in the high aggression group. Intrapersonal factors (e.g., depression, anxiety, post-traumatic stress disorder) were associated with inclusion in the middle aggression group. Future longitudinal research should examine what factors are associated with movement across aggression groups and capitalize upon knowledge gained in the current study to develop interventions.     

Dynamic and Marketing Capabilities as Predictors of Social Enterprises’ Performance

VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - Social enterprises (SEs) have an increasingly important role in developing more equitable societies worldwide. The...     

Risk Factors for Problematic Gambling: A Critical Literature Review

This article is a critical review of risk factors for pathological gambling categorized by demographics, physiological and biological factors, cognitive distortions, comorbidity and concurrent symptoms, and personality symptoms and characteristics. There is also a varia section (availability, parents playing, sensory characteristics, schedules of reinforcement, age of onset, and playing duration). The review found very few well established risk factors for pathological gambling (i.e. more than two studies to support the conclusions). Well established risk factors included demographic variables (age, gender), cognitive distortions (erroneous perceptions, illusion of control), sensory characteristics, schedules of reinforcement, comorbid disorders (OCD, drug abuse), and delinquency/illegal acts. An understanding of risk factors for pathological gambling should enhance prevention and treatment approaches.     

Intergenerational Experiences of Discrimination in Chinese American Families: Influences of Socialization and Stress

In this longitudinal study, we investigated the mechanisms by which Chinese American parents' experiences of discrimination influenced their adolescents' ethnicity‐related stressors (i.e., cultural misfit, discrimination, attitudes toward education). We focused on whether parents' ethnic‐racial socialization practices and perpetual foreigner stress moderated or mediated this relationship. Participants were 444 Chinese American families. Results indicated no evidence of moderation, but we observed support for mediation. Parental experiences of discrimination were associated with more ethnic‐racial socialization practices and greater parental perpetual foreigner stress. More ethnic‐racial socialization was related to greater cultural misfit in adolescents, whereas more perpetual foreigner stress was related to adolescents' poorer attitudes toward education and more reported discrimination. Relationships between mediators and outcomes were stronger for fathers than for mothers.     

Immigration and the American Obesity Epidemic1

Immigration is an important population dynamic at work in the U.S., but we know little about its impact on American obesity. Built on nutrition transition and immigration theories, this paper provides explanations for immigrants’ initial body composition advantage, its partial erosion over time, and the gender difference in the erosion. We find evidence that the American obesity epidemic would be much more severe without the mass immigration that began in 1965. In addition to confirming the erosion in immigrants’ body composition advantage, we further find that this erosion is weaker for men than for women. Once immigration’s impact is teased out, racial/ethnic disparities in body composition greatly differ from what we observe. This study provides gender‐specific estimates for the differences in obesity by nativity and residence duration and the net level of Hispanic‐white and Asian‐white disparities at the mean body mass index (BMI) as well as the overweight, Stage‐1, and Stage‐2 obesity cutoffs. Our findings suggest that immigration must be taken into account when addressing public health concerns.