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Author Jason J Ong

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Brief Report: Changes in PrEP Use, Sexual Practice, and Use of Face Mask During Sex Among MSM During the Second Wave of COVID-19 in Melbourne, Australia.

Eric P F Chow, Jane S Hocking, Jason J Ong, Tiffany R Phillips, Tina Schmidt, Andrew Buchanan, Elena Rodriguez, Kate Maddaford, Christopher K Fairley,

<h4>Background</h4>A second wave of COVID-19 began in late June in Victoria, Australia. Stage 3 then Stage 4 restrictions were introduced in July-August. This study aimed to compare the use of pre-exposure prophylaxis (PrEP) and sexual practices among men who have sex with men taking PrEP between May-June (post-first lockdown) and ... Read more >>

J Acquir Immune Defic Syndr (Journal of acquired immune deficiency syndromes (1999))
[2021, 86(2):153-156]

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Brief Report: Group Sex Among Men Who Have Sex With Men in the Era of PrEP: A Cross-Sectional Study.

Tiffany R Phillips, Christopher K Fairley, Catriona S Bradshaw, Jane S Hocking, Edmond P H Choi, Jason J Ong, Marjan Tabesh, Kate Maddaford, Eric P F Chow,

<h4>Background</h4>Group sex has been commonly reported among gay and bisexual men who have sex with men (GBMSM); however, there are limited studies on the factors associated with participating in group sex.<h4>Setting</h4>A cross-sectional study among GBMSM attending a sexual health clinic in Melbourne, Australia.<h4>Methods</h4>Univariable and multivariable logistic regression were performed to ... Read more >>

J Acquir Immune Defic Syndr (Journal of acquired immune deficiency syndromes (1999))
[2021, 86(2):e23-e27]

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Examining potential effects of non-occupational post-exposure prophylaxis (nPEP) on sexual behaviors of Chinese men who have sex with men: a cross-sectional study.

Haochu Li, Ran Wei, Jason J Ong, Eunsook Kim, Traci L Weinstein, Xiaofu Ning, Wei Ma,

<h4>Background</h4>In China, non-occupational post-exposure prophylaxis (nPEP) is not a conventional service yet and nPEP related studies are very few. Recently, China's 13th Five Year Action Plan for HIV/AIDS Containment and Prevention examines the feasibility of including nPEP as one of the national strategies for HIV prevention. However, there is a ... Read more >>

BMC Public Health (BMC public health)
[2021, 21(1):221]

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Young people's preferences for HIV self-testing services in Nigeria: a qualitative analysis.

Chisom Obiezu-Umeh, Titilola Gbajabiamila, Oliver Ezechi, Ucheoma Nwaozuru, Jason J Ong, Ifeoma Idigbe, David Oladele, Adesola Z Musa, Florida Uzoaru, Collins Airhihenbuwa, Joseph D Tucker, Juliet Iwelunmor,

<h4>Background</h4>HIV self-testing (HIVST) provides young people with a convenient, discreet, and empowering way to know their HIV status. However, there is limited knowledge of young people's preferences for HIVST services and potential factors that may influence the uptake of HIVST among this population. The purpose of this research was to ... Read more >>

BMC Public Health (BMC public health)
[2021, 21(1):67]

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HIV testing and diagnoses during the COVID-19 pandemic in Melbourne, Australia.

Eric P F Chow, Jason J Ong, Ian Denham, Christopher K Fairley,

J Acquir Immune Defic Syndr (Journal of acquired immune deficiency syndromes (1999))
[2020, Publish Ahead of Print:]

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Nudgeathons to control HIV: designing strategies using behavioural economics.

Jason J Ong, Eric P F Chow, Daniel Read, Umar Taj, David Lee, Ivo Vlaev,

AIDS (AIDS (London, England))
[2020, 34(15):2337-2340]

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Heterogeneity in individual preferences for HIV testing: A systematic literature review of discrete choice experiments.

Monisha Sharma, Jason J Ong, Connie Celum, Fern Terris-Prestholt,

<h4>Background</h4>Understanding variations in HIV testing preferences can help inform optimal combinations of testing services to maximize coverage. We conducted a systematic review of Discrete Choice Experiments (DCEs) eliciting HIV testing preference.<h4>Methods</h4>We searched the published literature for papers that conducted DCEs to assess user preferences for HIV testing.<h4>Findings</h4>We identified 237 publications; ... Read more >>

EClinicalMedicine (EClinicalMedicine)
[2020, 29-30:100653]

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"Moving from one environment to another, it doesn't automatically change everything". Exploring the transnational experience of Asian-born gay and bisexual men who have sex with men newly arrived in Australia.

Tiffany R Phillips, Nicholas Medland, Eric P F Chow, Kate Maddaford, Rebecca Wigan, Christopher K Fairley, Jason J Ong, Jade E Bilardi,

Asian-born gay, bisexual and other men who have sex with men (gbMSM) who are newly arrived in Australia are at a higher risk of acquiring HIV than Australian-born gbMSM. We used a social constructionist framework to explore HIV knowledge and prevention strategies used by newly-arrived Asian-born gbMSM. Twenty four Asian-born ... Read more >>

PLoS One (PloS one)
[2020, 15(11):e0242788]

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Pre-exposure Prophylaxis for HIV - an opportunity for the global control of sexually transmitted infections.

Megan J Ung, Christopher K Fairley, Sarah J Martin, Jason J Ong,

J Acquir Immune Defic Syndr (Journal of acquired immune deficiency syndromes (1999))
[2020, :]

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Chlamydia trachomatis transmission between the oropharynx, urethra and anorectum in men who have sex with men: a mathematical model.

Xianglong Xu, Eric P F Chow, Jason J Ong, Christian J P A Hoebe, Zhuoru Zou, Jane S Hocking, Christopher K Fairley, Lei Zhang,

<h4>Background</h4>It has been presumed that Chlamydia trachomatis is transmitted between men only through anal or oral sex, but no mathematical models have tested this presumption.<h4>Methods</h4>To test this presumption, we created 20 compartmental mathematical models of different sexual practices that included both oral and anal sex and calibrated these models to ... Read more >>

BMC Med (BMC medicine)
[2020, 18(1):326]

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Modelling the contribution that different sexual practices involving the oropharynx and saliva have on Neisseria gonorrhoeae infections at multiple anatomical sites in men who have sex with men.

Xianglong Xu, Eric P F Chow, Jason J Ong, Christian J P A Hoebe, Deborah Williamson, Mingwang Shen, Fabian Yuh Shiong Kong, Jane S Hocking, Christopher K Fairley, Lei Zhang,

<h4>Background</h4>The spectrum of sexual practices that transmit <i>Neisseria gonorrhoeae</i> in men who have sex with men (MSM) is controversial. No studies have modelled potential <i>Neisseria gonorrhoeae</i> transmission when one sexual practice follows another in the same sexual encounter ('sequential sexual practices'). Our aim was to test what sequential practices were ... Read more >>

Sex Transm Infect (Sexually transmitted infections)
[2020, :]

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Sexually transmitted infection diagnoses and access to a sexual health service before and after the national lockdown for COVID-19 in Melbourne, Australia

Eric P F Chow, Jane S Hocking, Jason J Ong, Tiffany R Phillips, Christopher K Fairey,

Abstract Background We aimed to examine the impact of lockdown on sexually transmitted infection (STI) diagnoses and access to a public sexual health service in the COVID-19 pandemic in Melbourne, Australia. Methods The operating hours of Melbourne Sexual Health Centre (MSHC) remained the same during the lockdown. We examined the ... Read more >>

Open Forum Infect Dis (Open forum infectious diseases)
[2020, :]

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Correlates of HIV self-testing among female sex workers in China: implications for expanding HIV screening.

Cheng Wang, Ya-Jie Wang, Joseph D Tucker, Ming-Zhou Xiong, Hong-Yun Fu, M Kumi Smith, Wei-Ming Tang, Jason J Ong, He-Ping Zheng, Bin Yang,

<h4>Background</h4>Human immunodeficiency virus (HIV) self-testing may help improve test uptake among female sex workers. China has implemented many HIV self-testing programs among men who have sex with men, creating an opportunity for promotion among female sex workers. However, there is a limited literature on examining HIV self-testing among female sex ... Read more >>

Infect Dis Poverty (Infectious diseases of poverty)
[2020, 9(1):147]

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Giving a Voice to Marginalised Groups for Health Care Decision Making.

Richard De Abreu Lourenço, Nancy Devlin, Kirsten Howard, Jason J Ong, Julie Ratcliffe, Jo Watson, Esther Willing, Elisabeth Huynh,

Patient (The patient)
[2021, 14(1):5-10]

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Supernatural Explanatory Models of Health and Illness and HIV Antiretroviral Therapy Use Among Young Men Who Have Sex with Men in China.

Stephen W Pan, M Kumi Smith, Richard M Carpiano, Hongyun Fu, Jason J Ong, Wenting Huang, Weiming Tang, Joseph D Tucker,

BACKGROUND:In China, men who have sex with men (MSM) shoulder a disproportionate HIV burden. Early initiation and adherence to HIV antiretroviral therapy (ART) will be critical to reversing the HIV epidemic in China, but ART usage remains suboptimal among MSM diagnosed with HIV. One understudied but potentially important factor underpinning ... Read more >>

Int J Behav Med (International journal of behavioral medicine)
[2020, 27(5):602-608]

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Oral preexposure prophylaxis continuation, measurement and reporting.

Kayla Stankevitz, Hannah Grant, Josie Lloyd, Gabriela B Gomez, Katharine Kripke, Kristine Torjesen, Jason J Ong, Fern Terris-Prestholt,

<h4>Objective</h4>The aim of this study was to appropriately plan for rollout and monitor impact of oral preexposure prophylaxis (PrEP). It is important to understand PrEP continuation and come to a consensus on how best to measure PrEP continuation. This study reviews data on PrEP continuation to document how it is ... Read more >>

AIDS (AIDS (London, England))
[2020, 34(12):1801-1811]

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Clinical presentation of asymptomatic and symptomatic women who tested positive for genital gonorrhoea at a sexual health service in Melbourne, Australia.

Mario Martín-Sánchez, Christopher K Fairley, Jason J Ong, Kate Maddaford, Marcus Y Chen, Deborah A Williamson, Catriona S Bradshaw, Eric P F Chow,

Gonorrhoea cases in women have been rising in Australia in the 2010s but the cause of the increase is not well understood. This cross-sectional study aimed to describe the characteristics of genital gonorrhoea infection in women attending the Melbourne Sexual Health Centre, Australia. Gonorrhoea cases were diagnosed by nucleic acid ... Read more >>

Epidemiol Infect (Epidemiology and infection)
[2020, 148:e240]

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Domestic HPV vaccine price and economic returns for cervical cancer prevention in China: a cost-effectiveness analysis.

Zhuoru Zou, Christopher K Fairley, Jason J Ong, Jane Hocking, Karen Canfell, Xiaomeng Ma, Eric P F Chow, Xianglong Xu, Lei Zhang, Guihua Zhuang,

<h4>Background</h4>Coinciding with the release of the first Chinese domestic human papillomavirus (HPV) vaccine Cecolin in 2019, and the substantial advancements in cervical cancer screening technology, we aimed to evaluate the cost-effectiveness of the combined strategies of cervical cancer screening programmes and universal vaccination of girls (aged 9-14 years) with Cecolin ... Read more >>

Lancet Glob Health (The Lancet. Global health)
[2020, 8(10):e1335-e1344]

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Adolescent and non-consensual anal sexual debut among Chinese men who have sex with men: a cross-sectional study.

Weiming Tang, Yehua Wang, Wenting Huang, Dan Wu, Fan Yang, Yongshi Xu, Jason J Ong, Hongyun Fu, Bin Yang, Cheng Wang, Wei Ma, Chongyi Wei, Joseph D Tucker,

<h4>Background</h4>Adolescent sexual debut and non-consensual sex have been linked to higher sexual risk and STI infection in adulthood among men who have sex with men (MSM) in high-income countries. This study aimed to examine adolescent and non-consensual anal sexual debut among Chinese MSM and to evaluate factors associated with adolescent ... Read more >>

BMC Infect Dis (BMC infectious diseases)
[2020, 20(1):732]

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Clinical characteristics and prognosis of anal squamous cell carcinoma: a retrospective audit of 144 patients from 11 cancer hospitals in southern China.

Yong Lu, Xiaohao Wang, Peiyang Li, Tao Zhang, Jiaming Zhou, Yufeng Ren, Yi Ding, Haihua Peng, Qichun Wei, Kaiyun You, Jason J Ong, Christopher K Fairley, Andrew E Grulich, Meijin Huang, Yuanhong Gao, Huachun Zou,

<h4>Background</h4>The incidence of anal squamous cell carcinoma (SCC) has been steadily growing globally in the past decade. Clinical data on anal SCC from China are rare. We conducted this study to describe the clinical and epidemiological characteristics of anal SCC in China and explore prognostic factors of outcomes among patients ... Read more >>

BMC Cancer (BMC cancer)
[2020, 20(1):679]

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The Preferred Qualities of Human Immunodeficiency Virus Testing and Self-Testing Among Men Who Have Sex With Men: A Discrete Choice Experiment.

Jason J Ong, Richard De Abreu Lourenco, Deborah Street, Kirsty Smith, Muhammad S Jamil, Fern Terris-Prestholt, Christopher K Fairley, Anna McNulty, Adam Hynes, Karl Johnson, Eric P F Chow, Benjamin Bavinton, Andrew Grulich, Mark Stoove, Martin Holt, John Kaldor, Rebecca Guy,

<h4>Objectives</h4>Human immunodeficiency virus self-testing (HIVST) is a promising approach to improve HIV testing coverage. We aimed to understand HIV testing preferences of men who have sex with men (MSM) to optimize HIVST implementation.<h4>Methods</h4>Discrete choice experiments (DCEs) were conducted among HIV-negative MSM living in Australia and aged ≥18 years. Men completed ... Read more >>

Value Health (Value in health : the journal of the International Society for Pharmacoeconomics and Outcomes Research)
[2020, 23(7):870-879]

Cited: 1 time

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Postexposure prophylaxis during COVID-19 lockdown in Melbourne, Australia.

Eric P F Chow, Jane S Hocking, Jason J Ong, Tiffany R Phillips, Christopher K Fairley,

Lancet HIV (The lancet. HIV)
[2020, 7(8):e528-e529]

Cited: 2 times

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Clinical presentation of asymptomatic and symptomatic heterosexual men who tested positive for urethral gonorrhoea at a sexual health clinic in Melbourne, Australia.

Mario Martín-Sánchez, Jason J Ong, Christopher K Fairley, Marcus Y Chen, Deborah A Williamson, Kate Maddaford, Ei T Aung, Georgia Carter, Catriona S Bradshaw, Eric P F Chow,

BACKGROUND:Asymptomatic screening for gonorrhoea in heterosexual men is currently not recommended in many countries including Australia, given the prevalence is relatively low in the heterosexual population. We aimed to determine the proportion of urethral gonorrhoea cases among heterosexual men attending a sexual health clinic that was asymptomatic and symptomatic, the ... Read more >>

BMC Infect Dis (BMC infectious diseases)
[2020, 20(1):486]

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Fear of nosocomial HIV infection may be a barrier to HIV testing among young college and university students in Suzhou, China.

Wanqi Wang, Xiao Shi, Yifan Jiang, Hanrui Zhao, Jason J Ong, Dan Wu, Joseph D Tucker, Fern Terris-Prestholt, Stephen W Pan,

<b>Objective:</b> Human immunodeficiency virus (HIV) test uptake among college and university students in China remains suboptimal. This study aimed to identify and weigh the relative importance of HIV testing preferences among university students in China. <b>Participants and methods:</b> Qualitative interviews and discrete choice experiments (DCE) were used to identify and ... Read more >>

J Am Coll Health (Journal of American college health : J of ACH)
[2020, :1-7]

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Changing the Use of HIV Pre-exposure Prophylaxis Among Men Who Have Sex With Men During the COVID-19 Pandemic in Melbourne, Australia.

Eric P F Chow, Jane S Hocking, Jason J Ong, Tina Schmidt, Andrew Buchanan, Elena Rodriguez, Kate Maddaford, Prital Patel, Christopher K Fairley,

We surveyed 204 men who have sex with men (MSM) who were pre-exposure prophylaxis (PrEP) users. One in 4 daily PrEP users stopped taking PrEP during the COVID-19 pandemic, and 5% switched to on-demand PrEP. Most men reduced PrEP use because they stopped having casual sex and reduced the number ... Read more >>

Open Forum Infect Dis (Open forum infectious diseases)
[2020, 7(7):ofaa275]

Cited: 3 times

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