Full Text Journal Articles by
Author Heather L Armstrong

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Research news in clinical context.

Heather L Armstrong, Weiming Tang, Kristine Shields,

Sex Transm Infect (Sexually transmitted infections)
[2021, 97(4):247-248]

Cited: 0 times

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Mathematical modelling of the influence of serosorting on the population-level HIV transmission impact of pre-exposure prophylaxis.

Linwei Wang, Nasheed Moqueet, Anna Simkin, Jesse Knight, Huiting Ma, Nathan J Lachowsky, Heather L Armstrong, Darrell H S Tan, Ann N Burchell, Trevor A Hart, David M Moore, Barry D Adam, Derek R Macfadden, Stefan Baral, Sharmistha Mishra,

<h4>Objectives</h4>HIV pre-exposure prophylaxis (PrEP) may change serosorting patterns. We examined the influence of serosorting on the population-level HIV transmission impact of PrEP, and how impact could change if PrEP users stopped serosorting.<h4>Design</h4>We developed a compartmental HIV transmission model parameterized with bio-behavioural and HIV surveillance data among MSM in Canada.<h4>Methods</h4>We separately ... Read more >>

AIDS (AIDS (London, England))
[2021, 35(7):1113-1125]

Cited: 1 time

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Undetectable or Unknown? A Longitudinal Event-Level Analysis of Disclosure of HIV Serostatus and Undetectability Among Gay, Bisexual, and Other Men Who have Sex with Men (gbMSM) in Metro Vancouver.

Jordan M Sang, Lu Wang, David M Moore, Nicanor Bacani, Terry Howard, Everett Blackwell, Allan Lal, Heather L Armstrong, Kiffer G Card, Richard Crosby, Eric A Roth, Robert S Hogg, Nathan J Lachowsky,

We examined temporal trends and factors associated with reporting partner's serostatus and viral load among a sample of gay, bisexual and other men who have sex with men (gbMSM) in Vancouver, Canada. Participants were recruited using respondent-driven sampling and we collected prospective cohort data from 09/2014 to 02/2017 using a ... Read more >>

AIDS Behav (AIDS and behavior)
[2021, 25(8):2630-2643]

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Longitudinal Event-Level Sexual Risk and Substance Use among Gay, Bisexual, and Other Men Who Have Sex with Men.

Jordan M Sang, Zishan Cui, Paul Sereda, Heather L Armstrong, Gbolahan Olarewaju, Allan Lal, Kiffer G Card, Eric A Roth, Robert S Hogg, David M Moore, Nathan J Lachowsky,

(1) Background: Condomless anal sex and substance use are associated with STI risk among gay, bisexual, and other men who have sex with men (gbMSM). Our first study objective was to describe event-level sexual risk and substance use trends among gbMSM. Our second study objective was to describe substances associated ... Read more >>

Int J Environ Res Public Health (International journal of environmental research and public health)
[2021, 18(6):]

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Use of HIV pre-exposure prophylaxis among urban Canadian gay, bisexual and other men who have sex with men: a cross-sectional analysis of the Engage cohort study.

Joseph Cox, Herak Apelian, Erica E M Moodie, Marc Messier-Peet, Trevor A Hart, Daniel Grace, David M Moore, Nathan J Lachowsky, Heather L Armstrong, Jody Jollimore, Shayna Skakoon-Sparling, Ricky Rodrigues, Darrell H S Tan, Mathieu Maheu-Giroux, Syed W Noor, Bertrand Lebouché, Cecile Tremblay, Gbolahan Olarewaju, Gilles Lambert, ,

<h4>Background</h4>In Canada, gay, bisexual and other men who have sex with men (GBM) are disproportionately affected by HIV. Our objective was to describe access to HIV pre-exposure prophylaxis (PrEP) and identify factors associated with not using PrEP among self-reported HIV-negative or HIV-unknown GBM.<h4>Methods</h4>This was a cross-sectional analysis of the Engage ... Read more >>

CMAJ Open (CMAJ open)
[2021, 9(2):E529-E538]

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Crystal Methamphetamine Use and Initiation among Gay, Bisexual, and Other Men Who Have Sex with Men Living with HIV in a Treatment as Prevention Environment.

Sean P Colyer, David M Moore, Zishan Cui, Julia Zhu, Heather L Armstrong, Matthew Taylor, Joshua Edward, Terry Howard, Chad Dickie, Gbolahan Olarewaju, Julio S G Montaner, Robert S Hogg, Eric A Roth, Nathan J Lachowsky,

<h4>Background</h4>Risk compensation in an HIV Treatment as Prevention (TasP) environment may increase high-risk sexual and substance use behaviors among people living with HIV. <i>Objective:</i> To examine recent crystal methamphetamine (CM) use/initiation in a longitudinal cohort of gay, bisexual, and other men who have sex with men (GBMSM) living with HIV ... Read more >>

Subst Use Misuse (Substance use & misuse)
[2020, 55(14):2428-2437]

Cited: 1 time

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Loneliness and self-rated physical health among gay, bisexual and other men who have sex with men in Vancouver, Canada.

Megan E Marziali, Heather L Armstrong, Kalysha Closson, Taylor McLinden, Lu Wang, Justin Barath, Marianne Harris, Eric A Roth, David M Moore, Nathan J Lachowsky, Robert S Hogg, Jordan M Sang, Kiffer G Card,

<h4>Background</h4>Due to stigma and discrimination, gay, bisexual and other men who have sex with men (gbMSM) potentially carry a heightened burden of loneliness. This analysis investigates loneliness among gbMSM and its relationship with self-rated physical health, along with the mediating effect of depression.<h4>Methods</h4>Participants were recruited using respondent-driven sampling into the ... Read more >>

J Epidemiol Community Health (Journal of epidemiology and community health)
[2020, 74(7):553-559]

Cited: 3 times

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Factors Associated with Cessation or Reduction of Methamphetamine Use among Gay, Bisexual, and Other Men Who Have Sex with Men (gbMSM) in Vancouver Canada.

Brooke Cheng, Jordan M Sang, Zishan Cui, Nicanor Bacani, Heather L Armstrong, Julia Zhu, Julius Elefante, Gbolahan Olarewaju, Kiffer G Card, Everett Blackwell, Nathan J Lachowsky, Robert S Hogg, Eric A Roth, David M Moore,

<i>Background:</i> Methamphetamine (MA) use among gay, bisexual, and other men who have sex with men (gbMSM) is a pervasive issue, associated with detrimental health outcomes. We identified factors associated with discontinuation or reduction in MA among a subset of gbMSM reporting frequent (at least weekly) use, with a specific focus ... Read more >>

Subst Use Misuse (Substance use & misuse)
[2020, 55(10):1692-1701]

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Population-Level Sexual Mixing According to HIV Status and Preexposure Prophylaxis Use Among Men Who Have Sex With Men in Montreal, Canada: Implications for HIV Prevention.

Linwei Wang, Nasheed Moqueet, Gilles Lambert, Daniel Grace, Ricky Rodrigues, Joseph Cox, Nathan J Lachowsky, Syed W Noor, Heather L Armstrong, Darrell H S Tan, Ann N Burchell, Huiting Ma, Herak Apelian, Jesse Knight, Marc Messier-Peet, Jody Jollimore, Stefan Baral, Trevor A Hart, David M Moore, Sharmistha Mishra,

Using cross-sectional survey data (Engage, 2017-2018) from 1,137 men who have sex with men, ≥16 years old, in Montreal, we compared observed human immunodeficiency virus (HIV) seroconcordance in previous-6-months' sexual partnerships with what would have been observed by chance if zero individuals serosorted. Of 5 recent partnerships where both individuals ... Read more >>

Am J Epidemiol (American journal of epidemiology)
[2020, 189(1):44-54]

Cited: 5 times

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Escape expectancies and sexualized substance use among gay, bisexual, and other men who have sex with men.

Kiffer G Card, Heather L Armstrong, Lu Wang, Nicanor Bacani, David M Moore, Eric A Roth, Robert S Hogg, Nathan J Lachowsky,

McKirnan's Cognitive Escape Theory (1996) is often characterized by the hypothesis that drugs are used during sex by gay, bisexual, and other men who have sex with men (gbMSM) to relieve internal cognitive conflict over safe-sex norms and sexual desire. We examined how McKirnan's Cognitive Escape Scale (CES) is related ... Read more >>

AIDS Care (AIDS care)
[2020, 32(12):1489-1497]

Cited: 0 times

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Longitudinal Event-Level Analysis of Gay and Bisexual Men's Anal Sex Versatility: Behavior, Roles, and Substance Use.

Lindsay Shaw, Lu Wang, Zishan Cui, Ashleigh J Rich, Heather L Armstrong, Nathan J Lachowsky, Paul Sereda, Kiffer G Card, Gbolahan Olarewaju, David Moore, Robert Hogg, Eric Abella Roth,

Gay and bisexual Men Who Have Sex with Men (GBM) are sexually unique in that they can practice penile-anal sex versatility, i.e. engage in insertive and receptive anal sex. Individual-level versatility is extensively researched both as a sexual behavior linked to HIV/STI transmission, and as a GBM identity that can ... Read more >>

J Sex Res (Journal of sex research)
[2019, 56(9):1136-1146]

Cited: 0 times

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Substance Use as a Mechanism for Social Inclusion among Gay, Bisexual, and Other Men Who Have Sex with Men in Vancouver, Canada.

Blake W Hawkins, Heather L Armstrong, Sarah Kesselring, Ashleigh J Rich, Zishan Cui, Paul Sereda, Terry Howard, Jamie I Forrest, David M Moore, Nathan J Lachowsky, Robert S Hogg, Eric A Roth,

<i>Background</i>: Previous research demonstrates that substance use preferences and social-sexual environments are highly interrelated for gay, bisexual, and other men who have sex with men (gbMSM). <i>Objective</i>: We conducted a qualitative study to explore the socio-cultural context of substance use among local gbMSM communities in Metro Vancouver, Canada. <i>Methods</i>: Twenty ... Read more >>

Subst Use Misuse (Substance use & misuse)
[2019, 54(12):1945-1955]

Cited: 2 times

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HIV leadership programming attendance is associated with PrEP and PEP awareness among young, gay, bisexual, and other men who have sex with men in Vancouver, Canada.

Kalysha Closson, Sarah Chown, Heather L Armstrong, Lu Wang, Nicanor Bacani, Darren Ho, Jody Jollimore, Gbolahan Olarewaju, David M Moore, Eric A Roth, Robert S Hogg, Nathan J Lachowsky,

<h4>Background</h4>Young gay, bisexual, and other men who have sex with men (YGBM) may have reduced engagement and knowledge of HIV care and biomedical HIV prevention strategies, such as pre-exposure prophylaxis (PrEP), post-exposure prophylaxis (PEP), and Treatment as Prevention (TasP), compared with adult GBM. We sought to understand differences in HIV ... Read more >>

BMC Public Health (BMC public health)
[2019, 19(1):429]

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"Condoms are … like public transit. It's something you want everyone else to take": Perceptions and use of condoms among HIV negative gay men in Vancouver, Canada in the era of biomedical and seroadaptive prevention.

Benjamin J Klassen, Karyn Fulcher, Sarah A Chown, Heather L Armstrong, Robert S Hogg, David M Moore, Eric A Roth, Nathan J Lachowsky,

<h4>Background</h4>The emergence of biomedical and seroadaptive HIV prevention strategies has coincided with a decline in condom use among gay men.<h4>Methods</h4>We undertook a social ecological analysis of condom use and perceptions using nineteen semi-structured interviews with HIV negative gay men in Vancouver, Canada who used HAART-based prevention strategies.<h4>Results</h4>Contributors to inconsistent condom ... Read more >>

BMC Public Health (BMC public health)
[2019, 19(1):120]

Cited: 2 times

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HIV Testing Among a Representative Community Sample of Gay, Bisexual, and Other Men Who Have Sex with Men in Vancouver, Canada.

Heather L Armstrong, Lu Wang, Julia Zhu, Nathan J Lachowsky, Kiffer G Card, Jason Wong, Jody Jollimore, Joshua Edward, Eric A Roth, Robert S Hogg, David M Moore,

Earlier HIV diagnosis allows for improved treatment outcomes and secondary prevention. It is recommended that all individuals know their HIV status and that those at higher risk test more frequently. Using a representative community sample of gay, bisexual, and other men who have sex with men (GBMSM), we aimed to: ... Read more >>

AIDS Behav (AIDS and behavior)
[2019, 23(2):347-358]

Cited: 3 times

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Trends in Awareness and Use of HIV PrEP Among Gay, Bisexual, and Other Men who have Sex with Men in Vancouver, Canada 2012-2016.

Terrance Mosley, Moliehi Khaketla, Heather L Armstrong, Zishan Cui, Paul Sereda, Nathan J Lachowsky, Mark W Hull, Gbolahan Olarewaju, Jody Jollimore, Joshua Edward, Julio S G Montaner, Robert S Hogg, Eric A Roth, David M Moore,

Gay, bisexual, and other men who have sex with men (gbMSM) are at the highest risk for HIV infection in British Columbia (BC). Pre-exposure prophylaxis (PrEP) has been recently licensed but is currently not publicly funded in BC. Using respondent-driven sampling, we recruited a cohort of gbMSM to complete a ... Read more >>

AIDS Behav (AIDS and behavior)
[2018, 22(11):3550-3565]

Cited: 15 times

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A longitudinal analysis of cannabis use and mental health symptoms among gay, bisexual, and other men who have sex with men in Vancouver, Canada.

Frank Y Chou, Heather L Armstrong, Lu Wang, Nicanor Bacani, Nathan J Lachowsky, Thomas L Patterson, Zach Walsh, Gbolahan Olarewaju, Kiffer G Card, Eric A Roth, Robert S Hogg, David M Moore,

<h4>Background</h4>Cannabis use, anxiety, and depression are common among gay, bisexual, and other men who have sex with men (gbMSM) and some report using cannabis to manage mental health symptoms.<h4>Methods</h4>Sexually-active gbMSM aged ≥16 years were recruited into a longitudinal cohort through respondent-driven sampling and completed study visits every six months. Data ... Read more >>

J Affect Disord (Journal of affective disorders)
[2019, 247:125-133]

Cited: 1 time

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Protective Factors Among Transgender and Gender Variant Youth: A Systematic Review by Socioecological Level.

Michelle Marie Johns, Oscar Beltran, Heather L Armstrong, Paula E Jayne, Lisa C Barrios,

Transgender and gender variant (GV) youth experience elevated risk for poor health and academic outcomes due mainly to social experiences of stigma and discrimination. To supplement the growing evidence on health risks encountered by transgender/GV youth, we identified factors theorized to be protective for these youth across all four levels ... Read more >>

J Prim Prev (The journal of primary prevention)
[2018, 39(3):263-301]

Cited: 17 times

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Sexual orientation measurement, bisexuality, and mental health in a sample of men who have sex with men in Vancouver, Canada.

Ashleigh J Rich, Heather L Armstrong, Zishan Cui, Paul Sereda, Nathan J Lachowsky, David M Moore, Robert S Hogg, Eric A Roth,

This cross-sectional study used a validated index (i.e., Hospital Anxiety and Depression Scale) to measure anxiety and depression (caseness score: ≥8) among men who have sex with men recruited via respondent-driven sampling in Vancouver, Canada (n=774), and investigated whether differences in mental health outcomes varied by sexual orientation measure (i.e., ... Read more >>

J Bisex (Journal of bisexuality)
[2018, 18(3):299-317]

Cited: 1 time

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Substance Use Patterns of Gay and Bisexual Men in the Momentum Health Study.

Eric Abella Roth, Zishan Cui, Lu Wang, Heather L Armstrong, Ashleigh J Rich, Nathan J Lachowsky, Paul Sereda, Kiffer G Card, Jody Jollimore, Terry Howard, Gbolahan Olarewaju, David M Moore, Robert S Hogg,

Research with male sexual minorities frequently combines gay and bisexual men as Men Who Have Sex with Men or Gay and Bisexual Men. When analyzed separately, bisexual men consistently feature negative health differentials, exemplified by higher substance use levels. This interpretation is not clear-cut because studies may combine bisexual men ... Read more >>

Am J Mens Health (American journal of men's health)
[2018, 12(5):1759-1773]

Cited: 2 times

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Belief in Treatment as Prevention and Its Relationship to HIV Status and Behavioral Risk.

Kiffer G Card, Heather L Armstrong, Nathan J Lachowsky, Zishan Cui, Paul Sereda, Allison Carter, Julio S G Montaner, Robert S Hogg, Eric A Roth, David M Moore,

<h4>Background</h4>We evaluated attitudes toward treatment as prevention (TasP) among gay, bisexual, and other men who have sex with men (GBM) in Vancouver, Canada.<h4>Methods</h4>Sexually active GBM, aged ≥16 years, were recruited between 2012 and 2015 using respondent-driven sampling. At each 6-month follow-up, participants completed a computer-administered questionnaire and nursing visit. Repeated-measures ... Read more >>

J Acquir Immune Defic Syndr (Journal of acquired immune deficiency syndromes (1999))
[2018, 77(1):8-16]

Cited: 10 times

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Patterns of Online and Offline Connectedness Among Gay, Bisexual, and Other Men Who Have Sex with Men.

Kiffer G Card, Heather L Armstrong, Nathan J Lachowsky, Zishan Cui, Julia Zhu, Eric A Roth, Robert S Hogg,

This study examined patterns of connectedness among 774 sexually-active gay, bisexual, and other men who have sex with men (GBM), aged ≥ 16 years, recruited using respondent-driven sampling in Metro Vancouver. Latent class analysis examined patterns of connectedness including: attendance at gay venues/events (i.e., bars/clubs, community groups, pride parades), social time spent with ... Read more >>

AIDS Behav (AIDS and behavior)
[2018, 22(7):2147-2160]

Cited: 2 times

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Associations between sexual partner number and HIV risk behaviors: implications for HIV prevention efforts in a Treatment as Prevention (TasP) environment.

Heather L Armstrong, Eric Abella Roth, Ashleigh Rich, Nathan J Lachowsky, Zishan Cui, Paul Sereda, Kiffer G Card, Jody Jollimore, Terry Howard, David M Moore, Robert S Hogg,

Previous research indicates that gay and bisexual men (GBM) have significantly more sexual partners than same-aged heterosexual men and women. As a result, some HIV intervention programs have focused on partner reduction. However, new research findings question the relevance of sexual partner number as a sexual risk measure for GBM ... Read more >>

AIDS Care (AIDS care)
[2018, 30(10):1290-1297]

Cited: 4 times

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The additive effects of depressive symptoms and polysubstance use on HIV risk among gay, bisexual, and other men who have sex with men.

Kiffer G Card, Nathan J Lachowsky, Heather L Armstrong, Zishan Cui, Lu Wang, Paul Sereda, Jody Jollimore, Thomas L Patterson, Trevor Corneil, Robert S Hogg, Eric A Roth, David M Moore,

<h4>Introduction</h4>Among gay, bisexual, and other men who have sex with men (GBM), collinearity between polysubstance use and mental health concerns has obscured their combined effects on HIV risk with multivariable results often highlighting only one or the other.<h4>Methods</h4>We used mediation and moderation analyses to examine the effects of polysubstance use ... Read more >>

Addict Behav (Addictive behaviors)
[2018, 82:158-165]

Cited: 8 times

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Assessing the longitudinal stability of latent classes of substance use among gay, bisexual, and other men who have sex with men.

Kiffer G Card, Heather L Armstrong, Allison Carter, Zishan Cui, Lu Wang, Julia Zhu, Nathan J Lachowsky, David M Moore, Robert S Hogg, Eric A Roth,

<h4>Background</h4>Association between substance use and HIV-risk among gay and bisexual men (GBM) is well documented. However, their substance use patterns are diverse, and it is unknown whether self-reported use patterns are stable over time.<h4>Methods</h4>Sexually-active GBM, aged >16 years, were recruited in Metro Vancouver using respondent-driven sampling and followed across 5 ... Read more >>

Drug Alcohol Depend (Drug and alcohol dependence)
[2018, 188:348-355]

Cited: 3 times

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