K Fujimoto
Datos Biográficos
| ID | 15187 |
|---|---|
| NOMBRE | K Fujimoto |
| NOMBRES | K |
| APELLIDO | Fujimoto |
| FIRMA | FUJIMOTO K |
| AFILIACIONES | The University of Texas Health Science Center at Houston |
| ORCID | 0000-0002-8445-2711 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 55 |
| TOTAL DE CITAS | 140 |
| TOTAL COMO AUTOR | 55 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 2003 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2026 |
| ÍNDICE H | 8 |
Intersectional Lives, and Ecological Risks
Contact with the criminal legal system -particularly delinquency and policing-are linked to suicide attempts among Black youth. These findings underscore the need for prevention strategies that integrate suicide risk screening with efforts to reduce harmful criminal legal exposures and support youth and families affected by incarceration
Associations Between Stigma, Discrimination, and HIV Continuum of Care Outcomes Among Criminal Legal-Involved Youth and Young Adults with HIV
These findings highlight an elevated burden of internalized HIV stigma and health care discrimination among transgender women and challenge the assumption that education uniformly protects against stigma. Instead, individuals with higher educational attainment may be more attuned to experiences of intersectional stigma. The positive association between healthcare discrimination and provider-patient engagement suggests a complex dynamic where expe…
Using social network analysis to identify influential community organizations
Collaboration and growth in a large research cooperative
Life-Space Mobility, Transportation, and the Companionship Network of Members of a Hispanic Senior Center
These findings extend previous knowledge of the role of life-space mobility and transportation in supporting general social participation for older adults to include the importance of transportation and mobility for having companions within a senior center
Sexual Behaviors and Human Papillomavirus Vaccination in a Heterosexually Active Adult Population at Increased Risk for HIV Infection
Factors associated with HIV testing and treatment among young Black MSM and trans women in three jail systems
Black men who have sex with men (BMSM) and transgender women (BTW) are disproportionately affected by incarceration and HIV. We assessed factors associated with HIV testing and viral suppression among 176 incarcerated BMSM and BTW in Chicago, IL; Los Angeles, CA; and Houston, TX. In multivariable logistic regression, having a sexual orientation of bisexual, heterosexual, or other vs. gay or same-gender loving was associated with higher odds of te…
Association between E-Cigarette Use Behaviors and Anxiety/Depression among Black/African American Adults Based on Sexual Identity
Limited studies have examined disparities in e-cigarette use among Black/African American adults by sexual identity and whether the relationship between symptoms of anxiety/depression and e-cigarette use varies by sexual identity. We examined the association between e-cigarette use behaviors (never, former, and current use) and anxiety/depression among a nationally representative sample of Black/African American adults who identified as a sexual …
Ending the HIV Epidemic
The rapid implementation of molecular HIV surveillance (MHS) has resulted in significant challenges for local health departments to develop real-time cluster detection and response (CDR) interventions for priority populations impacted by HIV. This study is among the first to explore professionals' strategies to implement MHS and develop CDR interventions in real-world public health settings. Methods: Semi-structured qualitative interviews were co…
Expanding Medicaid to Reduce Human Immunodeficiency Virus Transmission in Houston, Texas
CONTEXT: Medicaid expansion has been nationally shown to improve engagement in the human immunodeficiency virus (HIV) treatment and prevention continua, which are vital steps to stopping the HIV epidemic. New HIV infections in the United States are disproportionately concentrated among young Black men who have sex with men (YBMSM). Houston, TX, is the most populous city in the Southern United States with a racially/ethnically diverse population t…
Cohort-Based Education and Other Factors Related to Student Peer Relationships
Graduate students face a variety of stressors that relate to poor academic performance, lower completion rates, and high rates of depressive symptoms, anxiety, and stress. Student peers provide supports for coping with these stressors and succeeding academically. However, graduate students may find it difficult to form relationships with their peers. This mixed method social network analysis (MMSNA) examines graduate student perceptions of their …
Community-clinic linkages for promoting HIV prevention
Community-clinic linkages may help communities increase HIV pre-exposure prophylaxis (PrEP) uptake. Referrals from community-based organizations may be particularly important for linking Black men who have sex with men (MSM) to PrEP. This study describes PrEP referral and HIV/STI prevention networks among organizations that serve MSM in Houston, TX (N = 40), and Chicago, IL (N = 28), and compares network positions of organizations based on percen…
The association between egocentric sexual networks and sexual meeting venues with PrEP conversation and encouragement for use among Latinx men who have sex with men
Despite the increasing availability of pre-exposure prophylaxis (PrEP), Latinx men who have sex with men (LMSM) are not receiving PrEP-related information. To understand the influence of LMSM sexual networks on PrEP-related conversations and encouragement to use PrEP, this cross-sectional egocentric network study characterized the PrEP-related communication of 130 LMSM egos with 507 sexual partners (alters). Participants were recruited using resp…
“Everything…Fell Apart Once Covid-19 Hit”—Leveraging the Covid-19 Response to Strengthen Public Health Activities toward Ending the HIV Epidemic
COVID-19 caused widespread disruption of activities for Ending the HIV Epidemic (EHE). In this study we assessed public health perspectives on leveraging the COVID-19 response to advance the goals of EHE. We conducted a qualitative study with 33 public health partners in the Midwestern and Southern United States from October 2020 to February 2022. Participants were asked how the strategies developed for COVID-19 could be applied to the HIV epidem…
Exploring Preventive Healthcare in a High-Risk Vulnerable Population
This study describes preventive care behaviors and explores opportunities to deliver preventive sexual healthcare to a high-risk vulnerable population. Data from the National HIV Behavioral Surveillance (NHBS) system high-risk heterosexuals (HET) cycle (2019) in Houston, Texas, was used to describe preventive care utilization and assess the relationship between healthcare utilization and sociodemographic characteristics. More than 47% reported ha…
Stimulant use interventions may strengthen ‘Getting to Zero’ HIV elimination initiatives in Illinois
Sexual and social networks, venue attendance, and HIV risk among young men who have sex with men
OBJECTIVE: This study used a Social network analysis (SNA) approach to describe HIV transmission and venue affiliations among social and sexual networks of young men who have sex with men (YMSM) in Houston, TX. METHODS: A total of 34 YMSM indices aged 18-23 years and 23 of their network members were interviewed about their social and sexual networks and venues at which they met and spent time. RESULTS: Participants reported information on 220 fri…
Social Networks in an Assisted Living Community
This research contributes to the literature of older adults' nonkin social relationships by providing detailed descriptions of the acquaintance and companionship networks within an AL community, quantifying correlates of residents' social ties, and distinguishing between acquaintances and companions
Integrated molecular and affiliation network analysis
The Co-evolution of online social networks and syphilis incidence among young black men who have sex with men
A Social Network Analysis of Cooperation and Support in an HIV Service Delivery Network for Young Latino MSM in Miami
Purpose: The study aimed to identify HIV prevention, testing, and care services prioritizing young Latino men who have sex with men (MSM) in an HIV service delivery network in Miami-Dade County, Florida, by visually describing structural features and processes of collaboration within and between health and social venues.Methods: The study used cross-sectional data from 40 social and healthcare venues providing goods and services to young Latino M…
Collective Avoidance of Social and Health Venues and HIV Racial Inequities
Many younger Black men who have sex with men (YBMSM) are exposed to homonegativity, societal stigma, and racial discrimination in their social environment. This study uses a social network modeling methodology to identify aspects of the social environment that are not often described, that is, the places and spaces or “venues” where YBMSM socialize or where they receive HIV prevention services. In particular, we identify the structural features o…
Socio-Structural and Neighborhood Predictors of Incident Criminal Justice Involvement in a Population-Based Cohort of Young Black MSM and Transgender Women
Network overlap and knowledge of a partner’s HIV status among young men who have sex with men
For individuals living with HIV, disclosure of HIV status to their partners can be a source of psychological and emotional stress. Minimal information about serostatus disclosure is available for young men who have sex with men (YMSM). This study examined the disclosure of HIV status to social and sexual partners among YMSM using social and sexual network data. Respondent-driven sampling was used to collect data from YMSM aged 16-29 in Houston, T…
Facebook group affiliation ties, group topics, and HIV behavioral characteristics among young Black men who have sex with men
YBMSM were more likely to belong to personal/professional development groups.•YBMSM clustered around pairs of LGBTQ identity, sex, and nightlife groups.•Regular testers tended to belong to LGBTQ identity and nightlife groups.•Those who engaged in condomless sex tended to affiliate with LGBTQ identity groups.•Those who were aware of PrEP aware tended to affiliate with chat groups
Social network influences on adolescent substance use
Variations in network boundary and type
Network structural influences on the adoption of evidence‐based prevention in communities
This study examined the impact of key variables in coalition communication networks, centralization and density, on the adoption of evidence‐based substance abuse prevention. Data were drawn from a network survey and a corresponding community leader survey that measured leader attitudes and practices toward substance abuse prevention programs. Two types of coalition networks were measured: advice‐seeking and discussion relations. For each communi…
Multivariate dynamics of one-mode and two-mode networks
We examined social mechanisms that account for similarity in the social context of school-sponsored extracurricular sports activities among friends. We distinguish two social mechanisms: “shared sports activities that lead to friendship,” whereby friendship formation and maintenance are conditioned by joint sports participation, and “friendship that leads to shared sports activities,” a form of social influence whereby adolescents join or maintai…
Multiplex congruity
Global Tobacco Control Diffusion
Objectives. We analyzed demographic and social network variables associated with the timing of ratification of the Framework Convention on Tobacco Control (FCTC). Methods. We compiled a 2-mode data set that recorded country participation in FCTC negotiations, as well as the number of individuals per country per year who joined an online tobacco control network. We used logistic regression analysis of these 2 data sets along with geographic locati…
The Interplay of Friendship Networks and Social Networking Sites
Objectives. We examined the coevolution of adolescent friendships and peer influences with respect to their risk behaviors and social networking site use. Methods. Investigators of the Social Network Study collected longitudinal data during fall 2010 and spring 2011 from 10th-grade students in 5 Southern California high schools (n = 1434). We used meta-analyses of stochastic actor-based models to estimate changes in friendship ties and risk behav…
Feminine Capital
There are many studies of the effect of human capital on individual labor market out-comes and on the contribution of educational institutions to an individual's human, social, and cultural capital. Logistic regression analyses, using data on women's job placement in Japan, showed that a feminine characteristics and support from school were important for being hired by large companies for clerical jobs. This paper argues that there are forms of c…
Venue-Mediated Weak Ties in Multiplex HIV Transmission Risk Networks Among Drug-Using Male Sex Workers and Associates
Objectives. We investigated the structural characteristics of a multiplex HIV transmission risk network of drug-using male sex workers and their associates. Methods. Using a sample of 387 drug-using male sex workers and their male and female associates in Houston, Texas, we estimated an exponential random graph model to examine the venue-mediated relationships between individuals, the structural characteristics of relationships not linked to soci…
The decomposed affiliation exposure model
Self-identification with peer crowds (jocks, popular kids, druggies, etc.) has an important influence on adolescent substance use behavior. However, little is known about the impact of the shared nature of crowd identification on different stages of adolescent drinking behavior, or the way crowd identification interacts with participation in school-sponsored sports activities. This study examines drinking influences from (1) peers with shared cro…
A Network Assessment of Community-Based Participatory Research
Objectives. We sought to determine whether a community-based initiative designed to reduce cancer disparities among Pacific Islanders in Southern California increased communications between community-based organizations and university researchers. Methods. We conducted network analysis among 11 community-based organizations (CBOs) and 5 universities by interviewing 91 and 56 members of these organizations, respectively, at 2 points in time. We es…
Diffusion of innovations theory applied to global tobacco control treaty ratification
This study applies diffusion of innovations theory to understand network influences on country ratification of an international health treaty, the Framework Convention for Tobacco Control (FCTC). From 2003 to 2014 approximately 90% of United Nations member countries ratified the FCTC. We hypothesized that communication between tobacco control advocates on GLOBALink, a 7000-member online communication forum in existence from 1992 to 2012, would be…
Socio-Structural and Neighborhood Predictors of Incident Criminal Justice Involvement in a Population-Based Cohort of Young Black MSM and Transgender Women
Content-Driven Analysis of an Online Community for Smoking Cessation
Objectives. We identified content-specific patterns of network diffusion underlying smoking cessation in the context of online platforms, with the aim of generating targeted intervention strategies. Methods. QuitNet is an online social network for smoking cessation. We analyzed 16 492 de-identified peer-to-peer messages from 1423 members, posted between March 1 and April 30, 2007. Our mixed-methods approach comprised qualitative coding, automated…
From women's college to work
Social Networks in an Assisted Living Community
This research contributes to the literature of older adults' nonkin social relationships by providing detailed descriptions of the acquaintance and companionship networks within an AL community, quantifying correlates of residents' social ties, and distinguishing between acquaintances and companions
The Co-evolution of online social networks and syphilis incidence among young black men who have sex with men
A Social Network Analysis of Cooperation and Support in an HIV Service Delivery Network for Young Latino MSM in Miami
Purpose: The study aimed to identify HIV prevention, testing, and care services prioritizing young Latino men who have sex with men (MSM) in an HIV service delivery network in Miami-Dade County, Florida, by visually describing structural features and processes of collaboration within and between health and social venues.Methods: The study used cross-sectional data from 40 social and healthcare venues providing goods and services to young Latino M…
The Organizational Practice of Gendered Employment
This article discusses the supposedly “gender-neutral” Japanese organizational hiring practice of using a track-based employment system. In this system, prospective employees are required to accept nationwide transfers in residence to obtain career-track positions. Women have difficulty fulfilling this requirement because of cultural expectations to settle down and tend to domestic affairs (day care is often hard to access). Using job placement d…
Feminine Capital
There are many studies of the effect of human capital on individual labor market out-comes and on the contribution of educational institutions to an individual's human, social, and cultural capital. Logistic regression analyses, using data on women's job placement in Japan, showed that a feminine characteristics and support from school were important for being hired by large companies for clerical jobs. This paper argues that there are forms of c…
From women's college to work
Network structural influences on the adoption of evidence‐based prevention in communities
This study examined the impact of key variables in coalition communication networks, centralization and density, on the adoption of evidence‐based substance abuse prevention. Data were drawn from a network survey and a corresponding community leader survey that measured leader attitudes and practices toward substance abuse prevention programs. Two types of coalition networks were measured: advice‐seeking and discussion relations. For each communi…
Bridging
A Network Assessment of Community-Based Participatory Research
Objectives. We sought to determine whether a community-based initiative designed to reduce cancer disparities among Pacific Islanders in Southern California increased communications between community-based organizations and university researchers. Methods. We conducted network analysis among 11 community-based organizations (CBOs) and 5 universities by interviewing 91 and 56 members of these organizations, respectively, at 2 points in time. We es…
Global Tobacco Control Diffusion
Objectives. We analyzed demographic and social network variables associated with the timing of ratification of the Framework Convention on Tobacco Control (FCTC). Methods. We compiled a 2-mode data set that recorded country participation in FCTC negotiations, as well as the number of individuals per country per year who joined an online tobacco control network. We used logistic regression analysis of these 2 data sets along with geographic locati…
The Organizational Practice of Gendered Employment
This article discusses the supposedly “gender-neutral” Japanese organizational hiring practice of using a track-based employment system. In this system, prospective employees are required to accept nationwide transfers in residence to obtain career-track positions. Women have difficulty fulfilling this requirement because of cultural expectations to settle down and tend to domestic affairs (day care is often hard to access). Using job placement d…
The network autocorrelation model using two-mode data
Social network influences on adolescent substance use
Peer Influences
Organizational linkages in Japan’s female labor market
The form of institutional linkages between schools and employers changed during the decade-long economic recession in Japan. This article explores why institutional linkages between women’s colleges and large Japanese firms in the secondary labor market have survived, despite a long-term restraining of labor demand. From a network theory perspective, employers value information about applicants’ residency status, as it is conducive to reducing pe…
Variations in network boundary and type
The decomposed affiliation exposure model
Self-identification with peer crowds (jocks, popular kids, druggies, etc.) has an important influence on adolescent substance use behavior. However, little is known about the impact of the shared nature of crowd identification on different stages of adolescent drinking behavior, or the way crowd identification interacts with participation in school-sponsored sports activities. This study examines drinking influences from (1) peers with shared cro…
Racial/Ethnic Differences in Sexual Network Mixing
Mixing patterns within sexual networks have been shown to have an effect on HIV transmission, both within and across groups. This study examined sexual mixing patterns involving HIV-unknown status and risky sexual behavior conditioned on assortative/dissortative mixing by race/ethnicity. The sample used for this study consisted of drug-using male sex workers and their male sex partners. A log-linear analysis of 257 most at-risk MSM and 3,072 sex …
The Interplay of Friendship Networks and Social Networking Sites
Objectives. We examined the coevolution of adolescent friendships and peer influences with respect to their risk behaviors and social networking site use. Methods. Investigators of the Social Network Study collected longitudinal data during fall 2010 and spring 2011 from 10th-grade students in 5 Southern California high schools (n = 1434). We used meta-analyses of stochastic actor-based models to estimate changes in friendship ties and risk behav…
Venue-Mediated Weak Ties in Multiplex HIV Transmission Risk Networks Among Drug-Using Male Sex Workers and Associates
Objectives. We investigated the structural characteristics of a multiplex HIV transmission risk network of drug-using male sex workers and their associates. Methods. Using a sample of 387 drug-using male sex workers and their male and female associates in Houston, Texas, we estimated an exponential random graph model to examine the venue-mediated relationships between individuals, the structural characteristics of relationships not linked to soci…
Content-Driven Analysis of an Online Community for Smoking Cessation
Objectives. We identified content-specific patterns of network diffusion underlying smoking cessation in the context of online platforms, with the aim of generating targeted intervention strategies. Methods. QuitNet is an online social network for smoking cessation. We analyzed 16 492 de-identified peer-to-peer messages from 1423 members, posted between March 1 and April 30, 2007. Our mixed-methods approach comprised qualitative coding, automated…
Multiplex congruity
Diffusion of innovations theory applied to global tobacco control treaty ratification
This study applies diffusion of innovations theory to understand network influences on country ratification of an international health treaty, the Framework Convention for Tobacco Control (FCTC). From 2003 to 2014 approximately 90% of United Nations member countries ratified the FCTC. We hypothesized that communication between tobacco control advocates on GLOBALink, a 7000-member online communication forum in existence from 1992 to 2012, would be…
Risk Factors for Recent Intimate Partner Violence among Methamphetamine-Using Men and Women
The Substance Abuse, Violence, and HIV/AIDS (SAVA) syndemic model describes how the confluence of the three epidemics of substance abuse, violence, and HIV risk work synergistically to create excess burden among populations. We sought to identify risk factors associated with recent intimate partner violence (IPV) victimization among heterosexual methamphetamine (meth)-using men (n = 108) and women (n = 122) enrolled in FASTLANE-II, an HIV behavio…
Popularity breeds contempt
Network Centrality and Geographical Concentration of Social and Service Venues that Serve Young Men Who Have Sex with Men
Use of Pre-exposure Prophylaxis (PrEP) in Young Men Who Have Sex with Men is Associated with Race, Sexual Risk Behavior and Peer Network Size
Multiplex Competition, Collaboration, and Funding Networks Among Health and Social Organizations
BACKGROUND: Young men who have sex with men (YMSM) have the highest rates of human immunodeficiency virus (HIV) infection in the United States. Decades into the HIV epidemic, the relationships that YMSM-serving health and social organizations have with one another has not been studied in depth. OBJECTIVES: The aim of this study was to examine the competition, collaboration, and funding source structures of multiplex organization networks and the …
Statistical adjustment of network degree in respondent-driven sampling estimators
Psychology (38 obras) · Medicine (37 obras) · HIV/AIDS Research and Interventions (25 obras) · Social Psychology (24 obras) · HIV, Drug Use, Sexual Risk (23 obras) · Sociology (23 obras) · Computer Science (17 obras) · Men who have sex with men (17 obras) · Political science (17 obras) · Public health (16 obras)