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Sydney, Australia

Ryom L.,Copenhagen University | Mocroft A.,University College London | Kirk O.,Copenhagen University | Ross M.,Mount Sinai School of Medicine | And 8 more authors.
AIDS | Year: 2014

Objectives: Whilst several antiretroviral drugs have been associated with moderate chronic kidney disease (CKD), their contribution to advanced CKD and end-stage renal disease (ESRD) remain unknown. Design: D:A:D participants with at least three estimated glomerular filtration rates (eGFR) after February 2004 were followed until the first of advanced CKD (confirmed eGFR≤30 ml/min,≥3 months apart), ESRD (dialysis ≥3 months/transplantation), 6 months after last visit or February 2012. Methods: Poisson regression was used to assess risk factors for advanced CKD/ESRD including exposure to potential nephrotoxic antiretroviral drugs and antiretroviral drug discontinuation rates according to latest eGFR. Results: Among 35 192 persons contributing 200 119 person years of follow-up (PYFU), 135 (0.4%) developed advanced CKD (n=114)/ESRD (n=21); incidence rate=0.67 [95% confidence interval (CI), 0.56-0.79]/1000 PYFU. Tenofovir (TDF) was particularly frequently discontinued as eGFR declined. After adjustment, those previously exposed but currently off TDF had similar advanced CKD/ESRD rate ratios compared with those unexposed [1.00 (95% CI, 0.66-1.51)], while those currently on TDF had reduced rates [0.23 (95% CI, 0.13-0.41)]. No consistent associations with other antiretroviral drugs were seen. Results were robust after time-lagging antiretroviral drug exposure, stratifying by baseline eGFR, and allowing for competing risks. Other predictors were diabetes, hypertension, baseline eGFR, smoking and current CD4 + cell count. The incidence rate in nonsmokers with baseline eGFR60 and no diabetes or hypertension was 0.16 (95% CI 0.09-0.26)/1000 PYFU. Conclusion: Neither current nor recent antiretroviral drug use predicted advanced CKD/ESRD during 6 years median follow-up in a large, heterogenenous and primarily white cohort. TDF discontinuation rates increased with decreasing eGFR, leaving a selected group still on TDF at lower advanced CKD/ESRD risk. Traditional renal risk factors and current CD4+ cell count were the strongest advanced CKD/ESRD predictors. © 2014 Wolters Kluwer Health. Source

Naidoo S.,Jan Medical | Wand H.,Kirby Institute
Sexually Transmitted Infections | Year: 2013

Background and objectives Trichomonas vaginalis is known to be the most common, curable, sexually transmitted infection among sexually active women and may be associated with the acquisition and transmission of HIV. The purpose of this analysis is to determine the prevalence and incidence of T vaginalis and assess risk factors associated with T vaginalis infection in a cohort of women participating in a clinical trial. Methods We analysed data from women participating in a phase III vaginal diaphragm trial conducted in two communities in Durban, South Africa from 2003 to 2006. A total of 3492 women were screened and 1485 women meeting the respective study eligibility criteria were enrolled. T vaginalis infection was determined at the initial screening visit and at quarterly visits among the enrolled women. Sexual behaviour and sociodemographic data were collected as per the study protocol. Combined data were analysed using STATA V.10.0. Results At baseline, prevalence of infection was 6.5%. The overall incident rate was estimated to be 8.6/100 women-years. Prevalent T vaginalis infection was associated with having a concurrent chlamydial infection and incident infections were associated with increased number of sex partners. Conclusions T vaginalis infection was found to be relatively high among this cohort of women. Given the association of this infection with HIV, there is an evident need for T vaginalis screening and treatment in populations at risk for both infections. Source

Hellard M.E.,Burnet Institute | Jenkinson R.,Burnet Institute | Higgs P.,Kirby Institute | Stoove M.A.,Burnet Institute | And 7 more authors.
Medical Journal of Australia | Year: 2012

Objectives: To develop a mathematical model to project the potential impact of hepatitis C virus (HCV) treatment on HCV infection prevalence among people who inject drugs (PWID). Design and setting: An existing model of HCV transmission among PWID was parameterised using data from Victoria, Australia, including specific parameter estimates of the number of people who are currently active injecting drug users, average duration of injecting, chronic HCV infection prevalence among PWID, annual mortality, and annual HCV treatment rate. We also explored the impact of prevalence uncertainty, program scale-up, and new treatments. Main outcome measure: Prevalence of chronic HCV infection among people who are currently active injecting drug users. Results: With annual treatment rates of 13, 17, or 25 per 1000 PWID, the model predicts relative prevalence reductions of 20%, 30%, and 50%, respectively, within 30 years. If new treatments giving higher sustained viral response rates are available in 5 years, estimated impact is increased by 21%-23% at 15 years, and 17%-38% at 30 years, depending on treatment rates. Conclusions: This model suggests that modest rates of current HCV treatment among PWID in Victoria, Australia could halve HCV infection prevalence among PWID in 30 years. This finding suggests that interventions aimed at increasing access to HCV treatment in community clinics will benefit individual PWID and reduce HCV infection prevalence. Source

Martin L.,Sydney Sexual Health Center | Knight V.,Sydney Sexual Health Center | Read P.J.,Sydney Sexual Health Center | Read P.J.,Kirby Institute | And 2 more authors.
Sexually Transmitted Diseases | Year: 2013

BACKGROUND: Sydney Sexual Health Centre (SSHC) Xpress clinic has significantly reduced the length of stay and waiting time for clients at SSHC but is currently only available to clients who can read and understand a high level of English. This reduces access for culturally and linguistically diverse (CALD) clients. This study sought to determine the acceptability of 4 proposed components of an express clinic model among CALD clients: computer-assisted self-interview (CASI), self-collection of swabs/urine specimens, not having a physical examination, and consultation with a health promotion officer rather than with a clinician. Differences in acceptability based on language group, new or return client status, sex worker status, clinic visited status, and age were analyzed. METHODS: A cross-sectional, anonymous questionnaire was offered to all female Chinese, Thai, and Korean clients attending SSHC between March and November 2012. Multivariate regression and Pearson χ statistical analyses were conducted using STATA 12 software. RESULTS: A total of 366 questionnaires were returned from 149 Thai, 145 Chinese, and 72 Korean participants. After multivariate analysis, the only predictor of willingness to use an express model of service provision was language group: overall, 67% Thai (odds ratio, 3.74: confidence interval [CI], 2.03-6.89; P < 0.01) and 64% Korean (odds ratio, 3.58; CI, 1.77-7.25, P < 0.01) said that they would use it compared with 35% Chinese. Age, history of sex work, new or returning clients, and general or language clinic attendance did not impact on choices. Within the preference for individual components of the model, more Thai women were happy with using a health promotion officer (43.2%) than Chinese (14.1%) or Korean (8.5%) (P < 0.001); no groups were happy with forfeiting a physical examination; Thai (48.6%) and Korean (40.9%) were happier with self-swabbing than Chinese women (23.9%, P < 0.001); and more Thai were happy to use a CASI (44.2%) than Chinese (12%) or Korean (11.1%; P < 0.001). CONCLUSIONS: This research shows that the components of an express model used at SSHC are not favorable to our CALD client base. Despite a CALD express clinic having the potential to reduce waiting times, most clients did not favor reduced waiting time over being physically examined or using a CASI. Copyright © 2013 American Sexually Transmitted Diseases Association. All rights reserved. Source

Small W.,British Columbia Center for Excellence in | Small W.,Simon Fraser University | Small W.,Kirby Institute | Maher L.,Kirby Institute | And 7 more authors.
International Journal of Drug Policy | Year: 2013

Background: Illicit drug markets are a key component of the risk environment surrounding injection drug use. However, relatively few studies have explored how injection drug users' (IDUs) involvement in drug dealing shapes their experiences of drug market-related harm. This exploratory qualitative study aims to understand IDUs' dealing activities and roles, as well as the perceived benefits and risks related to participation in illicit drug markets, including experiences of drug market violence. Methods: Ten IDUs with extensive involvement in drug dealing activities were recruited from the Vancouver Injection Drug User Study (VIDUS) and participated in semi-structured qualitative interviews, which elicited discussion of experiences dealing drugs, perceived benefits and hazards related to dealing, and understandings of drug market violence. Results: Participant's involvement in drug market activities included corporate sales, freelance or independent sales, and opportunistic sales termed "middling" as well as drug market-related hustles entailing selling bogus drugs and robbing dealers. Participants primarily dealt drugs to support their own illicit drug use, and we found that arrest and criminal justice involvement, hazards stemming from drug debts, and drug market-related violence were key risks related to dealing activities. Conclusion: The challenges of managing personal consumption while selling drugs exacerbates the hazards associated with drug dealing. Efforts to address drug dealing among IDUs should consider both drug dependency and the material conditions that propel drug users towards dealing activities. Interventions should explore the potential of combining enhanced drug treatment programs with low threshold employment and alternative income generation opportunities. © 2013 . Source

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