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author:("Chen, mixing")
1.  Interview as intervention: The case of young adult multidrug users in the club scene 
This paper reports on changes in substance use and substance dependence symptoms - without intervention - among young adult multidrug users in the club scene, ages 18–29, (N=444) who participated in a natural history study. Computer-assisted personal interviews at baseline and 6-, 12-, and 18-month follow-ups included well-tested measures of substance use and dependence. Changes in substance dependence symptoms and drug use frequencies were calculated using the Cohen’s d statistic. Mean age was 22; 40% were female; 58% Hispanic, 17% White, and 21% Black. At 18-month follow-up assessment, participants reported significantly fewer days of cocaine (d= −.85 at 18 months), ecstasy (d= −.93), benzodiazepine (d= −.82), and prescription opioid (d= −.81) use, as well as reduced substance dependence symptoms (d= −.42). These results, together with data from focus groups with completers, suggest that comprehensive health and social risk assessments may have quite strong intervention effects among young adult multidrug users.
doi:10.1016/j.jsat.2012.08.004
PMCID: PMC3522800  PMID: 22971689
substance use; club drugs; young adult; reactive effects; intervention
2.  The association of depression and anxiety with glycemic control among Mexican Americans with diabetes living near the U.S.-Mexico border 
BMC Public Health  2014;14:176.
Background
The prevalence of diabetes is alarmingly high among Mexican American adults residing near the U.S.-Mexico border. Depression is also common among Mexican Americans with diabetes, and may have a negative influence on diabetes management. Thus, the purpose of the current study was to evaluate the associations of depression and anxiety with the behavioral management of diabetes and glycemic control among Mexican American adults living near the border.
Methods
The characteristics of Mexican Americans with diabetes living in Brownsville, TX (N = 492) were compared by depression/anxiety status. Linear regression models were conducted to evaluate the associations of depression and anxiety with BMI, waist circumference, physical activity, fasting glucose, and glycated hemoglobin (HbA1c).
Results
Participants with clinically significant depression and/or anxiety were of greater age, predominantly female, less educated, more likely to have been diagnosed with diabetes, and more likely to be taking diabetes medications than those without depression or anxiety. In addition, anxious participants were more likely than those without anxiety to have been born in Mexico and to prefer study assessments in Spanish rather than English. Greater depression and anxiety were associated with poorer behavioral management of diabetes (i.e., greater BMI and waist circumference; engaging in less physical activity) and poorer glycemic control (i.e., higher fasting glucose, HbA1c).
Conclusions
Overall, depression and anxiety appear to be linked with poorer behavioral management of diabetes and glycemic control. Findings highlight the need for comprehensive interventions along the border which target depression and anxiety in conjunction with diabetes management.
doi:10.1186/1471-2458-14-176
PMCID: PMC3929559  PMID: 24548487
3.  How to Undertake Research of MHC Utilization in Under-developed Countries? A Case Study of MHC Utilization in Central and Western Rural China 
Objective: This study was undertaken to address practical problems in maternal health care (MHC) utilization and conduct in-depth study of maternal health services utilization in underdeveloped countries(regions), thus to contribute to the achieving of the UN Millennium Development Goal 5.
Data Collection: After searching and screening based on key words like “MHC” and “utilization”, we included 45 English articles and 106 Chinese articles from Pubmed, Medline, China Knowledge Resource Integrated and Wang Fang data base. The research themes, issues, designs, perspectives, dimensions and methods of these dissertations were analyzed.
Results: The development of MHC utilization research can be divided into three phases: Studies of the first phase focused primarily on decreasing MMR, which caused attention to the central and western rural areas maternal health services in China from domestic as well as international community; Studies of the second phase centered around the practical impacts of the implementation of MHC relevant programs and policy, confirming that the implementation of these programs and policies improved MHC service delivery and utilization, and promoted cooperation between researchers and practitioners; Studies of the third phase focused on the quality of MHC service utilization. We also found that the major problem in the current MHC service utilization is the huge gap across regions and the existing researches lack innovation and comparison researches between in different countries.
Conclusion: Research themes of MHC services change regularly. We should grasp the characteristics and defects of current research to increase the innovation of future research and to better response to the problem solving, and thus to provide more valuable reference for the policy and practice of underdeveloped countries and areas.
doi:10.12669/pjms.296.3851
PMCID: PMC3955572  PMID: 24639861
Central and Western Rural China; Maternal Health Care (MHC); Problem; Study Themes; Utilization
4.  HIV risk among female sex workers in Miami: The impact of violent victimization and untreated mental illness 
AIDS Care  2011;24(5):553-561.
Street-based female sex workers constitute a vulnerable population for HIV, as they are often enmeshed in chronic patterns of substance use, sexual risk, homelessness, and violent victimization. This study examined the specific contributions of victimization history and abuse-related traumagenic factors to mental health functioning and sexual risk behaviors, while considering the impact of environmental risk factors as well. Using targeted sampling strategies, we enrolled 562 Miami-based female sex workers into an intervention trial testing the relative effectiveness of two alternative case management conditions in establishing linkages with health services and reducing risk for HIV. Lifetime prevalence of abuse was extremely elevated at 88%. Nearly half reported abuse before the age of 18, while 34% reported violent encounters with “dates” or clients in the past 90 days. Serious mental illness (SMI) was quite common, with 74% reporting severe symptoms of depression, anxiety, or traumatic stress. For those with histories of abuse, SMI appeared to mediate the association between abuse-related trauma and unprotected sex behaviors. Mental health treatment would appear to be an important component of effective HIV prevention among this vulnerable group, and should form part of a compendium of services offered to female sex workers.
doi:10.1080/09540121.2011.630342
PMCID: PMC3342480  PMID: 22085330
5.  Migration, Neighborhoods, and Networks: Approaches to Understanding How Urban Environmental Conditions Affect Syndemic Adverse Health Outcomes Among Gay, Bisexual and Other Men Who Have Sex with Men 
AIDS and behavior  2011;15(Suppl 1):S35-S50.
Adopting socioecological, intersectionality, and lifecourse theoretical frameworks may enhance our understanding of the production of syndemic adverse health outcomes among gay, bisexual and other men who have sex with men (MSM). From this perspective, we present preliminary data from three related studies that suggest ways in which social contexts may influence the health of MSM. The first study, using cross-sectional data, looked at migration of MSM to the gay resort area of South Florida, and found that amount of time lived in the area was associated with risk behaviors and HIV infection. The second study, using qualitative interviews, observed complex interactions between neighborhood-level social environments and individual-level racial and sexual identity among MSM in New York City. The third study, using egocentric network analysis with a sample of African American MSM in Baltimore, found that sexual partners were more likely to be found through face-to-face means than the Internet. They also observed that those who co-resided with a sex partner had larger networks of people to depend on for social and financial support, but had the same size sexual networks as those who did not live with a partner. Overall, these findings suggest the need for further investigation into the role of macro-level social forces on the emotional, behavioral, and physical health of urban MSM.
doi:10.1007/s10461-011-9902-5
PMCID: PMC3084486  PMID: 21369730
Homosexuality; Male; Urban health; Social environment

Results 1-5 (5)