John Geoffrey Walker
Dados Biográficos
| ID | 1535532 |
|---|---|
| NOME | John Geoffrey Walker |
| PRENOMES | John Geoffrey |
| SOBRENOME | Walker |
| ASSINATURA | WALKER J G |
| AFILIAÇÕES | University of Bristol |
| ORCID | 0000-0002-9732-5738 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 15 |
| TOTAL DE CITAÇÕES | 13 |
| TOTAL COMO AUTOR | 15 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 2003 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2026 |
| ÍNDICE H | 2 |
Cost and cost-effectiveness of alternative screening and diagnostic pathways for achieving hepatitis C elimination in the country of Georgia
We evaluated the cost and cost-effectiveness of alternative screening pathways during 2018–2022 within Georgia’s hepatitis C elimination program, which started in 2015. We calculated patient-level costs (2022 USD$) of hepatitis C treatment with centralized and decentralized diagnostic testing in hospitals, primary healthcare (PHC), harm reduction providers (HRP), or specialized providers (SP) from reimbursement records including the value of dona…
Seroprevalence of hepatitis C virus among refugees, asylum seekers, and internally displaced populations within Africa
Hepatitis C virus (HCV), an often overlooked public health concern, is highly prevalent among marginalized groups. Refugees, asylum seekers, and internally displaced people (RASIDP) constitute an underserved population in healthcare. Given that displacement rates are increasing and that HCV is endemic to many African countries, we aimed to determine the prevalence of HCV among RASIDP communities in Africa. Studies investigating HCV prevalence wit…
Gender differences in social networks of women and men who inject drugs in Kenya
Hepatitis C virus cascade of care among adults in Sindh province, Pakistan
Pakistan has the largest national burden of hepatitis C virus (HCV) infections (9.8 million). High levels of testing and treatment are needed to achieve HCV elimination, but little data exists on this in Pakistan. A household sero-survey from Sindh province (2019–2020) collected self-reported data from adults on previous HCV testing and treatment, and undertook HCV-antibody (HCV-Ab) testing of participants (2988 children ( 25 years), and adults w…
Characterising benzodiazepine use and the association with non-fatal overdose among people who inject opioids in England, Wales and Northern Ireland
Benzodiazepine use is common among PWIO in England, Wales, and Northern Ireland, and is associated with higher prevalence of non-fatal overdose. These findings underscore the need to strengthen overdose prevention and harm reduction efforts addressing benzodiazepine use across the UK
Impact of scaling up harm reduction interventions on injecting risk behaviours, ART outcomes and HIV incidence among people who inject drugs in Kenya
This study provides strong evidence for the benefits of NSP and OAT on varied HIV outcomes among PWID in Africa
Differential risk for Hepatitis C and HIV among people who inject drugs in Kenya
Impact and cost-effectiveness of interventions to eliminate hepatitis C virus among people who inject drugs in Haiphong, Vietnam
Using RDS surveys and other care settings to scale-up HCV-testing and treatment are cost-effective strategies to reduce HCV incidence among PWID in Vietnam
Cost-effectiveness of Hepatitis C virus self-testing in four settings
Globally, there are approximately 58 million people with chronic hepatitis C virus infection (HCV) but only 20% have been diagnosed. HCV self-testing (HCVST) could reach those who have never been tested and increase uptake of HCV testing services. We compared cost per HCV viraemic diagnosis or cure for HCVST versus facility-based HCV testing services. We used a decision analysis model with a one-year time horizon to examine the key drivers of eco…
Predictors of hepatitis C cure among people who inject drugs treated with directly observed therapy supported by peer case managers in Kenya
The Effect of Systemic Racism and Homophobia on Police Enforcement and Sexual and Emotional Violence among Sex Workers in East London
There is extensive qualitative evidence of violence and enforcement impacting sex workers who are ethnically or racially minoritized, and gender or sexual minority sex workers, but there is little quantitative evidence. Baseline and follow-up data were collected among 288 sex workers of diverse genders (cis/transgender women and men and non-binary people) in London (2018-2019). Interviewer-administered and self-completed questionnaires included r…
Cost and cost-effectiveness of a real-world HCV treatment program among HIV-infected individuals in Myanmar
INTRODUCTION: Over half of those hepatitis C virus (HCV)/HIV coinfected live in low-income and middle-income countries, and many remain undiagnosed or untreated. In 2016, Médecins Sans Frontières (MSF) established a direct-acting antiviral (DAA) treatment programme for people HCV/HIV coinfected in Myanmar. The purpose of our study was to evaluate the real-world cost and cost-effectiveness of this programme, and potential cost-effectiveness if imp…
An intensive model of care for hepatitis C virus screening and treatment with direct‐acting antivirals in people who inject drugs in Nairobi, Kenya
BACKGROUND AND AIMS: Hepatitis C virus (HCV) treatment is essential for eliminating HCV in people who inject drugs (PWID), but has limited coverage in resource-limited settings. We measured the cost-effectiveness of a pilot HCV screening and treatment intervention using directly observed therapy among PWID attending harm reduction services in Nairobi, Kenya. DESIGN: We utilized an existing model of HIV and HCV transmission among current and forme…
Income tax and elections in Britain, 1950-2001
Client Satisfaction and Staff Empathy at Pediatric HIV/Aids Programs
Client satisfaction is a topic of great interest in health care. It is associated with a variety of health outcomes and has economic, psychological, and social benefits. Staff empathy may be an important component of client satisfaction. This paper examines the relationship of client satisfaction to staff empathy at five pediatric HIV/AIDS outpatient clinics in Brooklyn, NY. One hundred fifty-eight clients (caretakers or parents) of infected chil…
Income tax and elections in Britain, 1950-2001
The Effect of Systemic Racism and Homophobia on Police Enforcement and Sexual and Emotional Violence among Sex Workers in East London
There is extensive qualitative evidence of violence and enforcement impacting sex workers who are ethnically or racially minoritized, and gender or sexual minority sex workers, but there is little quantitative evidence. Baseline and follow-up data were collected among 288 sex workers of diverse genders (cis/transgender women and men and non-binary people) in London (2018-2019). Interviewer-administered and self-completed questionnaires included r…
Client Satisfaction and Staff Empathy at Pediatric HIV/Aids Programs
Client satisfaction is a topic of great interest in health care. It is associated with a variety of health outcomes and has economic, psychological, and social benefits. Staff empathy may be an important component of client satisfaction. This paper examines the relationship of client satisfaction to staff empathy at five pediatric HIV/AIDS outpatient clinics in Brooklyn, NY. One hundred fifty-eight clients (caretakers or parents) of infected chil…
Income tax and elections in Britain, 1950-2001
Cost and cost-effectiveness of a real-world HCV treatment program among HIV-infected individuals in Myanmar
INTRODUCTION: Over half of those hepatitis C virus (HCV)/HIV coinfected live in low-income and middle-income countries, and many remain undiagnosed or untreated. In 2016, Médecins Sans Frontières (MSF) established a direct-acting antiviral (DAA) treatment programme for people HCV/HIV coinfected in Myanmar. The purpose of our study was to evaluate the real-world cost and cost-effectiveness of this programme, and potential cost-effectiveness if imp…
An intensive model of care for hepatitis C virus screening and treatment with direct‐acting antivirals in people who inject drugs in Nairobi, Kenya
BACKGROUND AND AIMS: Hepatitis C virus (HCV) treatment is essential for eliminating HCV in people who inject drugs (PWID), but has limited coverage in resource-limited settings. We measured the cost-effectiveness of a pilot HCV screening and treatment intervention using directly observed therapy among PWID attending harm reduction services in Nairobi, Kenya. DESIGN: We utilized an existing model of HIV and HCV transmission among current and forme…
The Effect of Systemic Racism and Homophobia on Police Enforcement and Sexual and Emotional Violence among Sex Workers in East London
There is extensive qualitative evidence of violence and enforcement impacting sex workers who are ethnically or racially minoritized, and gender or sexual minority sex workers, but there is little quantitative evidence. Baseline and follow-up data were collected among 288 sex workers of diverse genders (cis/transgender women and men and non-binary people) in London (2018-2019). Interviewer-administered and self-completed questionnaires included r…
Cost-effectiveness of Hepatitis C virus self-testing in four settings
Globally, there are approximately 58 million people with chronic hepatitis C virus infection (HCV) but only 20% have been diagnosed. HCV self-testing (HCVST) could reach those who have never been tested and increase uptake of HCV testing services. We compared cost per HCV viraemic diagnosis or cure for HCVST versus facility-based HCV testing services. We used a decision analysis model with a one-year time horizon to examine the key drivers of eco…
Predictors of hepatitis C cure among people who inject drugs treated with directly observed therapy supported by peer case managers in Kenya
Hepatitis C virus cascade of care among adults in Sindh province, Pakistan
Pakistan has the largest national burden of hepatitis C virus (HCV) infections (9.8 million). High levels of testing and treatment are needed to achieve HCV elimination, but little data exists on this in Pakistan. A household sero-survey from Sindh province (2019–2020) collected self-reported data from adults on previous HCV testing and treatment, and undertook HCV-antibody (HCV-Ab) testing of participants (2988 children ( 25 years), and adults w…
Characterising benzodiazepine use and the association with non-fatal overdose among people who inject opioids in England, Wales and Northern Ireland
Benzodiazepine use is common among PWIO in England, Wales, and Northern Ireland, and is associated with higher prevalence of non-fatal overdose. These findings underscore the need to strengthen overdose prevention and harm reduction efforts addressing benzodiazepine use across the UK
Impact of scaling up harm reduction interventions on injecting risk behaviours, ART outcomes and HIV incidence among people who inject drugs in Kenya
This study provides strong evidence for the benefits of NSP and OAT on varied HIV outcomes among PWID in Africa
Differential risk for Hepatitis C and HIV among people who inject drugs in Kenya
Impact and cost-effectiveness of interventions to eliminate hepatitis C virus among people who inject drugs in Haiphong, Vietnam
Using RDS surveys and other care settings to scale-up HCV-testing and treatment are cost-effective strategies to reduce HCV incidence among PWID in Vietnam
Cost and cost-effectiveness of alternative screening and diagnostic pathways for achieving hepatitis C elimination in the country of Georgia
We evaluated the cost and cost-effectiveness of alternative screening pathways during 2018–2022 within Georgia’s hepatitis C elimination program, which started in 2015. We calculated patient-level costs (2022 USD$) of hepatitis C treatment with centralized and decentralized diagnostic testing in hospitals, primary healthcare (PHC), harm reduction providers (HRP), or specialized providers (SP) from reimbursement records including the value of dona…
Seroprevalence of hepatitis C virus among refugees, asylum seekers, and internally displaced populations within Africa
Hepatitis C virus (HCV), an often overlooked public health concern, is highly prevalent among marginalized groups. Refugees, asylum seekers, and internally displaced people (RASIDP) constitute an underserved population in healthcare. Given that displacement rates are increasing and that HCV is endemic to many African countries, we aimed to determine the prevalence of HCV among RASIDP communities in Africa. Studies investigating HCV prevalence wit…
Gender differences in social networks of women and men who inject drugs in Kenya
Medicine (10 obras) · Hepatitis C virus research (9 obras) · Hepatitis B Virus Studies (7 obras) · Hepatitis C (7 obras) · Environmental health (6 obras) · HIV, Drug Use, Sexual Risk (6 obras) · Hepatitis C virus (5 obras) · Virology (5 obras) · Human immunodeficiency virus (HIV (4 obras) · Psychological intervention (4 obras)