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K. Hayashi · SciRah

Researcher profile · Semantic Scholar

K. Hayashi

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K. Hayashi — researcher profile on SciRah

h-index: 36
Works: 305
Citations: 5,768

Most-cited papers

Homelessness, unstable housing, and risk of HIV and hepatitis C virus acquisition among people who inject drugs: a systematic review and meta-analysis
Chiedozie Arum, Hannah Fraser, A. A. Artenie, Sandra Bivegete +37 more
2021Lancet Public Health174 citations Open access
Semantic Scholar
INCIDENCE OF HIV AND HEPATITIS C VIRUS AMONG PEOPLE WHO INJECT DRUGS, AND ASSOCIATIONS WITH AGE AND SEX OR GENDER: A GLOBAL SYSTEMATIC REVIEW AND META-ANALYSIS
Adelina Artenie, J. Stone, Hannah Fraser, D. Stewart +28 more
2023The Lancet Gastroenterology and Hepatology81 citations Open access
Semantic Scholar
Latent patterns of polysubstance use among people who use opioids: A systematic review.
M. Karamouzian, Andreas Pilarinos, K. Hayashi, J. Buxton +1 more
2022The International journal on drug policy47 citations Open access
Semantic Scholar
The relationship between sexual and gender stigma and suicide attempt and ideation among LGBTQI + populations in Thailand: findings from a national survey
Soroush Moallef, T. Salway, N. Phanuphak, Katrin Kivioja +2 more
2022Social Psychiatry and Psychiatric Epidemiology29 citations Open access
Semantic Scholar
PSYCHEDELIC USE IS ASSOCIATED WITH REDUCED DAILY OPIOID USE AMONG PEOPLE WHO USE ILLICIT DRUGS IN A CANADIAN SETTING
E. Argento, M. Socías, K. Hayashi, JinCheol Choi +4 more
2021The International journal on drug policy29 citations Open access
Semantic Scholar
HEALTH IMPACTS OF A SCALE-UP OF SUPERVISED INJECTION SERVICES IN A CANADIAN SETTING: AN INTERRUPTED TIME SERIES ANALYSIS
Mary Clare Kennedy, K. Hayashi, M. Milloy, Miranda Compton +1 more
2021Addiction29 citations Open access
Semantic Scholar
Injecting drugs alone during an overdose crisis in Vancouver, Canada
Alexa Norton, K. Hayashi, Cheyenne Johnson, JinCheol Choi +2 more
2022Harm Reduction Journal23 citations Open access
Semantic Scholar
INCREASING PREFERENCE FOR FENTANYL AMONG A COHORT OF PEOPLE WHO USE OPIOIDS IN VANCOUVER, CANADA, 2017–2018
Sarah Ickowicz, T. Kerr, Cameron J. Grant, M. Milloy +2 more
2021Substance Abuse23 citations Open access
Semantic Scholar
Digital Health Interventions for Depression and Anxiety in Low- and Middle-Income Countries: Rapid Scoping Review
L. Chau, R. Lam, Harry Minas, K. Hayashi +2 more
2025JMIR Mental Health22 citations Open access
Semantic Scholar
Use of Cannabis as a Harm Reduction Strategy Among People Who Use Drugs: A Cohort Study
J. Mok, M. Milloy, Cameron J. Grant, Stephanie Lake +4 more
2022Cannabis and Cannabinoid Research22 citations Open access
Semantic Scholar
THE RELATIONSHIP BETWEEN CRYSTAL METHAMPHETAMINE USE AND METHADONE RETENTION IN A PROSPECTIVE COHORT OF PEOPLE WHO USE DRUGS
Lindsay Mackay, P. Bach, M. Milloy, Z. Cui +2 more
2021Drug and Alcohol Dependence22 citations Open access
Semantic Scholar
COMPREHENSIVE NEEDLE AND SYRINGE PROGRAM AND OPIOID AGONIST THERAPY REDUCE HIV AND HEPATITIS C VIRUS ACQUISITION AMONG PEOPLE WHO INJECT DRUGS IN DIFFERENT SETTINGS: A POOLED ANALYSIS OF EMULATED TRIALS
D. V. van Santen, S. Lodi, P. Dietze, W. van den Boom +7 more
2023Addiction21 citations Open access
Semantic Scholar
The relationship between opioid agonist therapy satisfaction and fentanyl exposure in a Canadian setting
Lindsay Mackay, T. Kerr, N. Fairbairn, Cameron J. Grant +2 more
2021Addiction Science & Clinical Practice21 citations Open access
Semantic Scholar
Use of Cannabis for Harm Reduction Among People at High Risk for Overdose in Vancouver, Canada (2016-2018).
J. Mok, M. Milloy, Cameron J. Grant, Stephanie Lake +3 more
2021American Journal of Public Health21 citations Open access
Semantic Scholar
SOCIOECONOMIC MARGINALIZATION AND RISK OF OVERDOSE IN A COMMUNITY-RECRUITED COHORT OF PEOPLE WHO USE DRUGS: A LONGITUDINAL ANALYSIS
S. Mitra, JinCheol Choi, J. van Draanen, T. Kerr +5 more
2023The International journal on drug policy17 citations Open access
Semantic Scholar
Police seizure of drugs without arrest among people who use drugs in Vancouver, Canada, before provincial ‘decriminalization’ of simple possession: a cohort study
K. Hayashi, Tyson Singh Kelsall, Caitlin Shane, Z. Cui +3 more
2023Harm Reduction Journal17 citations Open access
Semantic Scholar
Factors associated with perceived decline in the quality of drugs during the COVID-19 pandemic: Evidence from community-recruited cohorts of people who use drugs in Vancouver, Canada
Erica McAdam, K. Hayashi, Hui-Ru Dong, Z. Cui +6 more
2022Drug and Alcohol Dependence16 citations Open access
Semantic Scholar
AWARENESS OF FENTANYL EXPOSURE AND THE ASSOCIATED OVERDOSE RISKS AMONG PEOPLE WHO INJECT DRUGS IN A CANADIAN SETTING
K. Hayashi, E. Wood, Hui-Ru Dong, J. Buxton +4 more
2021Drug and Alcohol Review16 citations Open access
Semantic Scholar
A drug-related Good Samaritan Law and calling emergency medical services for drug overdoses in a Canadian setting
Soroush Moallef, JinCheol Choi, M. Milloy, K. Debeck +2 more
2021Harm Reduction Journal16 citations Open access
Semantic Scholar
Day-to-day impact of COVID-19 and other factors associated with risk of nonfatal overdose among people who use unregulated drugs in five cities in the United States and Canada
Soroush Moallef, B. Genberg, K. Hayashi, S. Mehta +12 more
2022Drug and Alcohol Dependence15 citations Open access
Semantic Scholar
The Cannabis-Dependent Relationship Between Methadone Treatment Dose and Illicit Opioid Use in a Community-Based Cohort of People Who Use Drugs
Stephanie Lake, T. Kerr, J. Buxton, Z. Walsh +5 more
2021Cannabis and Cannabinoid Research15 citations Open access
Semantic Scholar
LONGITUDINAL POLYSUBSTANCE USE PATTERNS AND NON-FATAL OVERDOSE: A REPEATED MEASURES LATENT CLASS ANALYSIS
M. Karamouzian, Zishan Cui, K. Hayashi, K. Debeck +3 more
2024The International journal on drug policy14 citations Open access
Semantic Scholar
Income generation and the patterning of substance use: A gender-based analysis
Kaitlyn Jaffe, E. Nosova, L. Maher, K. Hayashi +2 more
2021Drug and Alcohol Dependence14 citations Open access
Semantic Scholar
The impact of the COVID-19 pandemic on access to supervised consumption programs
E. Gubskaya, Mary Clare Kennedy, K. Hayashi, Z. Cui +2 more
2023Substance Abuse Treatment, Prevention, and Policy13 citations Open access
Semantic Scholar
CANNABIS USE TO MANAGE OPIOID CRAVINGS AMONG PEOPLE WHO USE UNREGULATED OPIOIDS DURING A DRUG TOXICITY CRISIS
H. Reddon, Stephanie Lake, M. Socías, K. Hayashi +3 more
2023The International journal on drug policy13 citations Open access
Semantic Scholar
Trajectories of retention in opioid agonist therapy and overdose risk during a communitywide overdose epidemic in a Canadian setting
M. Socías, Hui-Ru Dong, E. Wood, S. Nolan +3 more
2021American Journal of Preventive Medicine13 citations Open access
Semantic Scholar
“It just doesn’t stop”: Perspectives of women who use drugs on increased overdoses during the COVID-19 pandemic
Kelsey A. Speed, Ryan McNeil, K. Hayashi, L. Maher +1 more
2024Drug and Alcohol Review12 citations Open access
Semantic Scholar
Substance use and other factors associated with COVID-19 vaccine uptake among people at risk for or living with HIV: Findings from the C3PNO consortium
M. Javanbakht, Lamia Khan, B. Mustanski, S. Shoptaw +12 more
2023Preventive medicine reports12 citations Open access
Semantic Scholar
Impacts of the COVID-19 pandemic on enrollment in medications for opioid use disorder (MOUD) in Vancouver, Canada: An interrupted time series analysis
M. Socías, JinCheol Choi, N. Fairbairn, Cheyenne Johnson +4 more
2023The International journal on drug policy12 citations Open access
Semantic Scholar
Longitudinal latent polysubstance use patterns among a cohort of people who use opioids in Vancouver, BC, Canada
M. Karamouzian, Z. Cui, K. Hayashi, K. Debeck +3 more
2023Drug and Alcohol Review12 citations Open access
Semantic Scholar
Difficulty accessing supervised consumption services during the COVID-19 pandemic among people who use drugs in Vancouver, Canada
R. Cassie, K. Hayashi, K. Debeck, M. Milloy +4 more
2022Harm Reduction Journal12 citations Open access
Semantic Scholar
SUBOPTIMAL NONMEDICAL QUALITIES OF PRIMARY CARE LINKED WITH CARE AVOIDANCE AMONG PEOPLE WHO USE DRUGS IN A CANADIAN SETTING AMID AN INTEGRATED HEALTH CARE REFORM
Soroush Moallef, Laura M. Dale, F. Homayra, Cristy Zonneveld +3 more
2022Journal of Substance Abuse Treatment11 citations Open access
Semantic Scholar
Methadone dose, cannabis use, and treatment retention: findings from a community-based sample of people who use unregulated drugs
Stephanie Lake, J. Buxton, Z. Walsh, Ziva D. Cooper +4 more
2022Journal of addiction medicine11 citations Open access
Semantic Scholar
The relationship between sexual and gender stigma and difficulty accessing primary and mental healthcare services among LGBTQI+ populations in Thailand: Findings from a national survey
Soroush Moallef, T. Salway, N. Phanuphak, Katrin Kivioja +2 more
2022International Journal of Mental Health and Addiction11 citations Open access
Semantic Scholar
A GENDER COMPARATIVE ANALYSIS OF POST-TRAUMATIC STRESS DISORDER AMONG A COMMUNITY-BASED COHORT OF PEOPLE WHO USE DRUGS IN VANCOUVER, CANADA
S. Mitra, William K Lee, K. Hayashi, Jade Boyd +4 more
2021Addictive Behaviours11 citations Open access
Semantic Scholar
Non-Medical Prescription Opioid Use And In-Hospital Illicit Drug Use Among People Who Use Drugs
Gurjit S. Parmar, K. Hayashi, S. Nolan, M. Milloy +4 more
2021Drug and Alcohol Review11 citations Open access
Semantic Scholar
Experiences of violence during the COVID-19 pandemic among people who use drugs in a Canadian setting: a gender-based cross-sectional study
Anmol Swaich, Lindsey Richardson, Z. Cui, K. Debeck +3 more
2023BMC Public Health10 citations Open access
Semantic Scholar
ASSOCIATION OF SEX WORK AND SOCIAL-STRUCTURAL FACTORS WITH NON-FATAL OVERDOSE AMONG WOMEN WHO USE DRUGS IN VANCOUVER, CANADA
Miriam T. H. Harris, S. Goldenberg, Z. Cui, N. Fairbairn +5 more
2023The International journal on drug policy10 citations Open access
Semantic Scholar
SHIFTS IN SUBSTANCE USE PATTERNS AMONG A COHORT OF PEOPLE WHO USE OPIOIDS AFTER DELISTING OF OXYCONTIN IN BC, CANADA: AN INTERRUPTED TIME SERIES STUDY
M. Karamouzian, J. Buxton, Celestin Hategeka, E. Nosova +3 more
2022The International journal on drug policy10 citations Open access
Semantic Scholar
PREDICTORS OF CRYSTAL METHAMPHETAMINE USE INITIATION OR RE-INITIATION AMONG PEOPLE RECEIVING OPIOID AGONIST THERAPY: A PROSPECTIVE COHORT STUDY
Z. Cui, K. Hayashi, P. Bach, Hui-Ru Dong +2 more
2022Drug and Alcohol Dependence10 citations Open access
Semantic Scholar
The use of diverted pharmaceutical opioids is associated with reduced risk of fentanyl exposure among people using unregulated drugs in Vancouver, Canada
M. Socías, Cameron J. Grant, K. Hayashi, Geoff Bardwell +3 more
2021Drug and Alcohol Dependence9 citations Open access
Semantic Scholar
AVAILABILITY AND USE OF NON-PRESCRIBED BUPRENORPHINE-NALOXONE IN A CANADIAN SETTING, 2014–2020
P. Bach, Misha Bawa, Cameron J. Grant, M. Milloy +1 more
2021The International journal on drug policy8 citations Open access
Semantic Scholar
Knowledge of a Drug-Related Good Samaritan Law Among People Who Use Drugs, Vancouver, Canada
Soroush Moallef, K. Debeck, M. Milloy, J. Somers +2 more
2021Health Education & Behavior8 citations Open access
Semantic Scholar
Latent polydrug use patterns and the provision of injection initiation assistance among people who inject drugs in three North American settings
Indhu Rammohan, Sonia Jain, Shelly Sun, Charles Marks +6 more
2023Drug and Alcohol Review7 citations Open access
Semantic Scholar
Food insecurity during the COVID-19 pandemic who use drugs in Vancouver, Canada
Tyson Singh Kelsall, K. Debeck, Cameron J. Grant, P. Gorbach +2 more
2023Public Health Nutrition7 citations Open access
Semantic Scholar
Prevalence and correlates of stocking up on drugs during the COVID-19 pandemic: Data from the C3PNO Consortium
L. King, K. Hayashi, B. Genberg, J. Choi +12 more
2022Drug and Alcohol Dependence7 citations Open access
Semantic Scholar
OPIOID AGONIST THERAPY ENGAGEMENT AND CRYSTAL METHAMPHETAMINE USE: THE IMPACT OF UNREGULATED OPIOID USE IN VANCOUVER, CANADA
Z. Cui, P. Bach, L. Ti, K. Hayashi +3 more
2022The International journal on drug policy7 citations Open access
Semantic Scholar
“Street Sweeps”: The Municipal Government-Enforced Confiscation of Personal Belongings Among Unstably Housed People Who Use Drugs in Vancouver, Canada
Irem Mia Eren, Eric C. Sayre, Caitlin Shane, Tyson Singh Kelsall +6 more
2025Public Health6 citations Open access
Semantic Scholar
Patterns of socioeconomic marginalization and non-fatal overdose among people who use drugs: A gender-stratified repeated measures latent class analysis
S. Mitra, L. Richardson, Zishan Cui, Mark Gilbert +3 more
2024Social Science & Medicine (1967)6 citations
Semantic Scholar
CRYSTAL METHAMPHETAMINE USE SUBGROUPS AND ASSOCIATED ADDICTION CARE ACCESS AND OVERDOSE RISK IN A CANADIAN URBAN SETTING
Olivia Brooks, P. Bach, Hui-Ru Dong, M. Milloy +3 more
2022Drug and Alcohol Dependence6 citations Open access
Semantic Scholar

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