Janni Leung

116.6k total citations · 10 hit papers
208 papers, 8.0k citations indexed

About

Janni Leung is a scholar working on Epidemiology, Clinical Psychology and Pharmacology. According to data from OpenAlex, Janni Leung has authored 208 papers receiving a total of 8.0k indexed citations (citations by other indexed papers that have themselves been cited), including 76 papers in Epidemiology, 55 papers in Clinical Psychology and 42 papers in Pharmacology. Recurrent topics in Janni Leung's work include Substance Abuse Treatment and Outcomes (49 papers), Cannabis and Cannabinoid Research (37 papers) and Smoking Behavior and Cessation (31 papers). Janni Leung is often cited by papers focused on Substance Abuse Treatment and Outcomes (49 papers), Cannabis and Cannabinoid Research (37 papers) and Smoking Behavior and Cessation (31 papers). Janni Leung collaborates with scholars based in Australia, United Kingdom and United States. Janni Leung's co-authors include Wayne Hall, Gary Chan, Louisa Degenhardt, Amy Peacock, Matthew Hickman, Samantha Colledge‐Frisby, Sarah Larney, Jason Grebely, Deirdre McLaughlin and Daniel Stjepanović and has published in prestigious journals such as The Lancet, SHILAP Revista de lepidopterología and PLoS ONE.

In The Last Decade

Janni Leung

193 papers receiving 7.9k citations

Hit Papers

5 papers align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Global prevalence of injecting drug use and sociodemographic characteristics and prevalence of HIV, HBV, and HCV in people who inject drugs: a multistage systematic review

2017 996 citations Louisa Degenhardt, Samantha Colledge‐Frisby et al. profile →
Global statistics on alcohol, tobacco and illicit drug use: 2017 status report

2018 697 citations Janni Leung, Samantha Colledge‐Frisby et al. Addiction profile →
Burden of non-communicable diseases in sub-Saharan Africa, 1990–2017: results from the Global Burden of Disease Study 2017

2019 542 citations Janni Leung et al. profile →
Depression and anxiety in relation to cancer incidence and mortality: a systematic review and meta-analysis of cohort studies

2019 459 citations Janni Leung et al. profile →
Global, regional, and country-level coverage of interventions to prevent and manage HIV and hepatitis C among people who inject drugs: a systematic review

2017 293 citations Janni Leung, Samantha Colledge‐Frisby et al. profile →
Public health implications of legalising the production and sale of cannabis for medicinal and recreational use

2019 232 citations Wayne Hall, Daniel Stjepanović et al. profile →
What is the prevalence and risk of cannabis use disorders among people who use cannabis? a systematic review and meta-analysis

2020 195 citations Janni Leung, Gary Chan et al. Addictive Behaviors profile →
Mental health, quality of life, wellbeing, loneliness and use of social media in a time of social distancing during the COVID-19 outbreak. A cross-country comparative study

2021 138 citations Amy Østertun Geirdal, Janni Leung et al. profile →
Epidemiology of injecting drug use, prevalence of injecting-related harm, and exposure to behavioural and environmental risks among people who inject drugs: a systematic review

2023 109 citations Louisa Degenhardt, Samantha Colledge‐Frisby et al. profile →
The impact of eSports and online video gaming on lifestyle behaviours in youth: A systematic review

2021 104 citations Gary Chan, Janni Leung et al. Computers in Human Behavior profile →

Peers

Countries citing papers authored by Janni Leung

Since Specialization

Citations

This map shows the geographic impact of Janni Leung's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Janni Leung with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Janni Leung more than expected).

Fields of papers citing papers by Janni Leung

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Janni Leung. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Janni Leung. The network helps show where Janni Leung may publish in the future.

Co-authorship network of co-authors of Janni Leung

This figure shows the co-authorship network connecting the top 25 collaborators of Janni Leung. A scholar is included among the top collaborators of Janni Leung based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Janni Leung. Janni Leung is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Patterns of Social Media Use across Age Groups during the COVID-19 Pandemic: A Study across Four Countries 2024 ·Social Sciences ·Tore Bonsaksen, Hilde Thygesen, Janni Leung, Gary Lamph, (unknown), Amy Østertun Geirdal	5
2	The Gaming Disorder Identification Test (GADIT) – A screening tool for Gaming Disorder based on ICD-11 2024 ·Journal of Behavioral Addictions ·Gary Chan, John B. Saunders, Daniel Stjepanović, (unknown), Jason P. Connor, Leanne Hides, Andrew Wood, Daniel L. King, Kristiana Siste, Jiang Long, Janni Leung	3
3	Extended hours of video game play and negative physical symptoms and pain 2024 ·Computers in Human Behavior ·Janni Leung, John B. Saunders, Daniel Stjepanović, Calvert Tisdale, (unknown), Jason P. Connor, Matthew J. Gullo, Andrew Wood, Gary Chan	3
4	Through the looking glass: An alcohol advertisement every 3 minutes 2024 ·Drug and Alcohol Review ·(unknown), Janni Leung, Daniel Stjepanović, Gary Chan	3
5	What is the hype on #MedicinalCannabis in the United States? A content analysis of medicinal cannabis tweets 2023 ·Drug and Alcohol Review ·Carmen Lim, Tianze Sun, Coral Gartner, Jason P. Connor, (unknown), Wayne Hall, (unknown), Daniel Stjepanović, Gary Chan, Janni Leung	3
6	Viral Vaping: A systematic review and meta analysis of e-cigarette and Tobacco-Related social media content and its influence on youth behaviours and attitudes 2023 ·Addictive Behaviors ·(unknown), Carmen Lim, (unknown), Tianze Sun, Giang Thu Vu, Benjamin Johnson, (unknown), Jack Chung, Sandy H. Huang, Janni Leung, Daniel Stjepanović, Jason P. Connor, Gary Chan	13
7	Global prevalence of heated tobacco product use, 2015–22: A systematic review and meta‐analysis 2023 ·Addiction ·Tianze Sun, (unknown), Carmen Lim, Katherine East, Steve S. Xu, Anne C K Quah, (unknown), Benjamin Johnson, (unknown), Daniel Stjepanović, Janni Leung, Jason P. Connor, Coral Gartner, Wayne Hall, Giang Thu Vu, Gary Chan	32
8	How much cannabis is used in a joint in Australia? An experimental investigation into use by potency and frequency 2023 ·Drug and Alcohol Review ·(unknown), Daniel Stjepanović, Valentina Lorenzetti, Wayne Hall, Janni Leung	1
9	The implementation and public health impacts of cannabis legalization in Canada: a systematic review 2023 ·Addiction ·Wayne Hall, Daniel Stjepanović, (unknown), Janni Leung	39
10	Predicting the long-term effects of electronic cigarette use on population health: a systematic review of modelling studies 2023 ·Tobacco Control ·Giang Thu Vu, Daniel Stjepanović, Tianze Sun, Janni Leung, Jack Chung, Jason P. Connor, Phong K. Thai, Coral Gartner, Bach Xuan Tran, Wayne Hall, Gary Chan	3
11	A latent class analysis of patterns of tobacco and cannabis use in Australia and their health‐related correlates 2023 ·Drug and Alcohol Review ·Carmen Lim, Janni Leung, Shannon Gravely, Coral Gartner, Tianze Sun, Vivian Chiu, Jack Chung, Daniel Stjepanović, Jason P. Connor, Roman Scheurer, Wayne Hall, Gary Chan	5
12	Common adverse events of electronic cigarettes compared with traditional nicotine replacement therapies: A systematic review and meta‐analysis 2023 ·Drug and Alcohol Review ·(unknown), Janni Leung, Gary Chan, Tianze Sun, Jason P. Connor, Wayne Hall, Daniel Stjepanović	6
13	Mood and Anxiety Symptoms in Persons Taking Prescription Opioids: A Systematic Review with Meta-Analyses of Longitudinal Studies 2022 ·Pain Medicine ·Janni Leung, Thomas Santo, Samantha Colledge‐Frisby, Tesfa Mekonen, (unknown), Louisa Degenhardt, Jason P. Connor, Wayne Hall, Daniel Stjepanović	20
14	Causal inference with observational data in addiction research 2022 ·Addiction ·Gary Chan, Carmen Lim, Tianze Sun, Daniel Stjepanović, Jason P. Connor, Wayne Hall, Janni Leung	23
15	Content analysis of cannabis vaping videos on YouTube 2021 ·Addiction ·Carmen Lim, Janni Leung, Jack Chung, Tianze Sun, Coral Gartner, Jason P. Connor, Wayne Hall, Vivian Chiu, Calvert Tisdale, Daniel Stjepanović, Gary Chan	25
16	Did the under‐reporting of meth/amphetamine use increase in a general population survey in Australia as negative media coverage increased? 2021 ·Addiction ·Gary Chan, Tianze Sun, Carmen Lim, Daniel Stjepanović, (unknown), Benjamin Johnson, Wayne Hall, Janni Leung	10
17	Pain and Psychotic-like Experiences in Young People Using Cannabis 2021 ·SHILAP Revista de lepidopterología ·(unknown), (unknown), Katherine A. Mason, Laura K. Ferris, Catherine Quinn, Leanne Hides, Janni Leung, (unknown)	1
18	What Have Been the Public Health Impacts of Cannabis Legalisation in the USA? A Review of Evidence on Adverse and Beneficial Effects 2019 ·Current Addiction Reports ·Janni Leung, Vivian Chiu, Gary Chan, Daniel Stjepanović, Wayne Hall	33
19	Correlates of electronic cigarette use in the general population and among smokers in Australia – Findings from a nationally representative survey 2019 ·Addictive Behaviors ·Gary Chan, Janni Leung, Coral Gartner, Hua‐Hie Yong, Ron Borland, Wayne Hall	17
20	Social support and subsequent disability: it is not the size of your network that counts 2012 ·Age and Ageing ·Deirdre McLaughlin, Janni Leung, Nancy A. Pachana, Leon Flicker, Graeme J. Hankey, Amy Shields Dobson	43

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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