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Eric Leas

Title(s)Assistant Adjunct Professor, Family Medicine and Public Health
SchoolHealth Sciences
Address9500 Gilman Drive #0725
La Jolla CA 92093
Phone619-346-9131
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    Collapse Education and Training
    Stanford University, Stanford, CAPostdoctoral Fellowship11/2018Preventive Medicine
    UC San Diego, La Jolla, CAPhD06/2017Public Health
    UC Los Angeles, Los Angeles, CAMPH06/2013Epidemiology

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    Dr. Leas is best known for his studies that track health behaviors in digital data sources (e.g., Google), but he also conducts studies of health equity issue and the epidemiology of tobacco use behaviors. Dr. Leas has served as a Co-Investigator on the FDA-funded and NIDA-led Population Assessment of Tobacco and Health, and other NIH and California state-sponsored projects. Since beginning his PhD in 2013, Dr. Leas has published more than 50 articles, with many appearing in high impact journals such as JAMA, American Journal of Public Health, and Nature Digital Medicine. His research is frequently featured in popular media outlets for news (e.g., the Atlantic, NY Times, Washington Post, etc.) and entertainment news (e.g., Dr. Drew, Dr. Oz, The Today Show, etc.) and he has several articles that rank among the top 1% of all articles scored by the media monitoring company Altmetric. Dr. Leas also teaches research methodology for undergraduate students and hosts a summer workshop on R Statistics for masters and PhD students.

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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help. to make corrections and additions.
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    Altmetrics Details PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. #HIV: Alignment of HIV-Related Visual Content on Instagram with Public Health Priorities in the US. AIDS Behav. 2020 Jul; 24(7):2045-2053. Nobles AL, Leas EC, Latkin CA, Dredze M, Strathdee SA, Ayers JW. PMID: 31916098.
      View in: PubMed   Mentions:    Fields:    
    2. Automated image analysis of instagram posts: Implications for risk perception and communication in public health using a case study of #HIV. PLoS One. 2020; 15(5):e0231155. Nobles AL, Leas EC, Noar S, Dredze M, Latkin CA, Strathdee SA, Ayers JW. PMID: 32365124.
      View in: PubMed   Mentions:    Fields:    
    3. A Source of Bias in Studies of E-Cigarettes and Smoking Cessation. Nicotine Tob Res. 2020 Apr 21; 22(5):861-862. Pierce JP, Messer K, Leas EC, Kealey S, White MM, Benmarhnia T. PMID: 31398246.
      View in: PubMed   Mentions:    Fields:    
    4. A Philip Morris advertisement for its heated tobacco product IQOS sets a troubling precedent. Tob Control. 2020 Feb 04. Leas EC, Cohen JE, Ayers JW. PMID: 32019894.
      View in: PubMed   Mentions:    Fields:    
    5. Responses to addiction help-seeking from Alexa, Siri, Google Assistant, Cortana, and Bixby intelligent virtual assistants. NPJ Digit Med. 2020; 3:11. Nobles AL, Leas EC, Caputi TL, Zhu SH, Strathdee SA, Ayers JW. PMID: 32025572.
      View in: PubMed   Mentions:
    6. The effect of college attendance on young adult cigarette, e-cigarette, cigarillo, hookah and smokeless tobacco use and its potential for addressing tobacco-related health disparities. Prev Med. 2020 03; 132:105954. Leas EC, Trinidad DR, Pierce JP, Benmarhnia T. PMID: 31917304.
      View in: PubMed   Mentions:    Fields:    
    7. Requests for Diagnoses of Sexually Transmitted Diseases on a Social Media Platform. JAMA. 2019 11 05; 322(17):1712-1713. Nobles AL, Leas EC, Althouse BM, Dredze M, Longhurst CA, Smith DM, Ayers JW. PMID: 31688875.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    8. Trends in Internet Searches for Cannabidiol (CBD) in the United States. JAMA Netw Open. 2019 Oct 02; 2(10):e1913853. Leas EC, Nobles AL, Caputi TL, Dredze M, Smith DM, Ayers JW. PMID: 31642924.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    9. Ignoring Data Delays Our Reaction to Emerging Public Health Tragedies Like 13 Reasons Why. JAMA Psychiatry. 2019 Sep 25. Leas EC, Dredze M, Ayers JW. PMID: 31553419.
      View in: PubMed   Mentions:    Fields:    
    10. What to do when tobacco advertisers exploit antitobacco social media campaigns to sell tobacco. Tob Control. 2020 Mar; 29(2):243-244. Leas EC, Prochaska JJ, Ayers J, Nobles AL, Henriksen L. PMID: 31249102.
      View in: PubMed   Mentions:    Fields:    
    11. The Need for Federal Regulation of Marijuana Marketing. JAMA. 2019 06 11; 321(22):2163-2164. Ayers JW, Caputi TL, Leas EC. PMID: 31095243.
      View in: PubMed   Mentions: 1     Fields:    Translation:Animals
    12. State and regional gaps in coverage of 'Tobacco 21' policies. Tob Control. 2020 Mar; 29(2):226-227. Leas EC, Schliecher N, Recinos A, Mahoney M, Henriksen L. PMID: 31004006.
      View in: PubMed   Mentions:    Fields:    
    13. Harm perceptions and tobacco use initiation among youth in Wave 1 and 2 of the Population Assessment of Tobacco and Health (PATH) Study. Prev Med. 2019 06; 123:185-191. Strong DR, Leas E, Elton-Marshall T, Wackowski OA, Travers M, Bansal-Travers M, Hyland A, White M, Noble M, Cummings KM, Taylor K, Kaufman AR, Choi K, Pierce JP. PMID: 30878572.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    14. Place-Based Inequity in Smoking Prevalence in the Largest Cities in the United States. JAMA Intern Med. 2019 03 01; 179(3):442-444. Leas EC, Schleicher NC, Prochaska JJ, Henriksen L. PMID: 30615029.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    15. Next generation media monitoring: Global coverage of electronic nicotine delivery systems (electronic cigarettes) on Bing, Google and Twitter, 2013-2018. PLoS One. 2018; 13(11):e0205822. Ayers JW, Dredze M, Leas EC, Caputi TL, Allem JP, Cohen JE. PMID: 30388126.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    16. Can E-Cigarettes and Pharmaceutical Aids Increase Smoking Cessation and Reduce Cigarette Consumption? Findings From a Nationally Representative Cohort of American Smokers. Am J Epidemiol. 2018 11 01; 187(11):2397-2404. Benmarhnia T, Pierce JP, Leas E, White MM, Strong DR, Noble ML, Trinidad DR. PMID: 29955810.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    17. US Food and Drug Administration Inspection of Tobacco Sales to Minors at Top Pharmacies, 2012-2017. JAMA Pediatr. 2018 11 01; 172(11):1089-1090. Lee JGL, Schleicher NC, Leas EC, Henriksen L. PMID: 30193340.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    18. Response. J Natl Cancer Inst. 2018 10 01; 110(10):1144. Pierce JP, Leas EC, Benmarhnia T, Strong DR. PMID: 29506059.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    19. Effectiveness of Pharmaceutical Smoking Cessation Aids in a Nationally Representative Cohort of American Smokers. J Natl Cancer Inst. 2018 06 01; 110(6):581-587. Leas EC, Pierce JP, Benmarhnia T, White MM, Noble ML, Trinidad DR, Strong DR. PMID: 29281040.
      View in: PubMed   Mentions: 5     Fields:    Translation:Humans
    20. Association Between Receptivity to Tobacco Advertising and Progression to Tobacco Use in Youth and Young Adults in the PATH Study. JAMA Pediatr. 2018 05 01; 172(5):444-451. Pierce JP, Sargent JD, Portnoy DB, White M, Noble M, Kealey S, Borek N, Carusi C, Choi K, Green VR, Kaufman AR, Leas E, Lewis MJ, Margolis KA, Messer K, Shi Y, Silveira ML, Snyder K, Stanton CA, Tanski SE, Bansal-Travers M, Trinidad D, Hyland A. PMID: 29582078.
      View in: PubMed   Mentions: 9     Fields:    Translation:Humans
    21. The Potential Influence of Regulatory Environment for E-Cigarettes on the Effectiveness of E-Cigarettes for Smoking Cessation: Different Reasons to Temper the Conclusions From Inadequate Data. Nicotine Tob Res. 2018 04 02; 20(5):659. Benmarhnia T, Leas E, Hendrickson E, Trinidad DR, Strong DR, Pierce JP. PMID: 28541517.
      View in: PubMed   Mentions: 1     Fields:    
    22. Online Sales of Marijuana: An Unrecognized Public Health Dilemma. Am J Prev Med. 2018 05; 54(5):719-721. Caputi TL, Leas EC, Dredze M, Ayers JW. PMID: 29576446.
      View in: PubMed   Mentions: 2     Fields:    Translation:AnimalsPHPublic Health
    23. Standardised cigarette packaging may reduce the implied safety of Natural American Spirit cigarettes. Tob Control. 2018 10; 27(e2):e118-e123. Leas EC, Pierce JP, Dimofte CV, Trinidad DR, Strong DR. PMID: 29255011.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    24. Can a selfie promote public engagement with skin cancer? Prev Med. 2018 06; 111:280-283. Noar SM, Leas E, Althouse BM, Dredze M, Kelley D, Ayers JW. PMID: 29109014.
      View in: PubMed   Mentions:    Fields:    Translation:HumansPHPublic Health
    25. They're heating up: Internet search query trends reveal significant public interest in heat-not-burn tobacco products. PLoS One. 2017; 12(10):e0185735. Caputi TL, Leas E, Dredze M, Cohen JE, Ayers JW. PMID: 29020019.
      View in: PubMed   Mentions: 11     Fields:    
    26. Internet Searches for Suicide Following the Release of 13 Reasons Why. JAMA Intern Med. 2017 10 01; 177(10):1527-1529. Ayers JW, Althouse BM, Leas EC, Dredze M, Allem JP. PMID: 28759671.
      View in: PubMed   Mentions: 11     Fields:    Translation:Humans
    27. Pre-adolescent Receptivity to Tobacco Marketing and Its Relationship to Acquiring Friends Who Smoke and Cigarette Smoking Initiation. Ann Behav Med. 2017 Oct; 51(5):730-740. Strong DR, Messer K, Hartman SJ, Nodora J, Vera L, White MM, Leas E, Pharris-Ciurej N, Borek N, Pierce JP. PMID: 28255935.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    28. The Charlie Sheen Effect on Rapid In-home Human Immunodeficiency Virus Test Sales. Prev Sci. 2017 07; 18(5):541-544. Allem JP, Leas EC, Caputi TL, Dredze M, Althouse BM, Noar SM, Ayers JW. PMID: 28516308.
      View in: PubMed   Mentions: 1     Fields:    Translation:HumansPHPublic Health
    29. Receptivity to Tobacco Advertising and Susceptibility to Tobacco Products. Pediatrics. 2017 Jun; 139(6). Pierce JP, Sargent JD, White MM, Borek N, Portnoy DB, Green VR, Kaufman AR, Stanton CA, Bansal-Travers M, Strong DR, Pearson JL, Coleman BN, Leas E, Noble ML, Trinidad DR, Moran MB, Carusi C, Hyland A, Messer K. PMID: 28562266.
      View in: PubMed   Mentions: 16     Fields:    Translation:HumansAnimals
    30. Susceptibility to tobacco product use among youth in wave 1 of the population Assessment of tobacco and health (PATH) study. Prev Med. 2017 Aug; 101:8-14. Trinidad DR, Pierce JP, Sargent JD, White MM, Strong DR, Portnoy DB, Green VR, Stanton CA, Choi K, Bansal-Travers M, Shi Y, Pearson JL, Kaufman AR, Borek N, Coleman BN, Hyland A, Carusi C, Kealey S, Leas E, Noble ML, Messer K. PMID: 28526392.
      View in: PubMed   Mentions: 15     Fields:    Translation:Humans
    31. Why do people use electronic nicotine delivery systems (electronic cigarettes)? A content analysis of Twitter, 2012-2015. PLoS One. 2017; 12(3):e0170702. Ayers JW, Leas EC, Allem JP, Benton A, Dredze M, Althouse BM, Cruz TB, Unger JB. PMID: 28248987.
      View in: PubMed   Mentions: 21     Fields:    Translation:Humans
    32. Postdiagnosis social networks and breast cancer mortality in the After Breast Cancer Pooling Project. Cancer. 2017 Apr 01; 123(7):1228-1237. Kroenke CH, Michael YL, Poole EM, Kwan ML, Nechuta S, Leas E, Caan BJ, Pierce J, Shu XO, Zheng Y, Chen WY. PMID: 27943274.
      View in: PubMed   Mentions: 10     Fields:    Translation:HumansPHPublic Health
    33. Pokémon GO-A New Distraction for Drivers and Pedestrians. JAMA Intern Med. 2016 12 01; 176(12):1865-1866. Ayers JW, Leas EC, Dredze M, Allem JP, Grabowski JG, Hill L. PMID: 27635638.
      View in: PubMed   Mentions: 10     Fields:    Translation:Humans
    34. Which cigarettes do Americans think are safer? A population-based analysis with wave 1 of the PATH study. Tob Control. 2017 03; 26(e1):e59-e60. Leas EC, Ayers JW, Strong DR, Pierce JP. PMID: 27742918.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    35. Big Data Sensors of Organic Advocacy: The Case of Leonardo DiCaprio and Climate Change. PLoS One. 2016; 11(8):e0159885. Leas EC, Althouse BM, Dredze M, Obradovich N, Fowler JH, Noar SM, Allem JP, Ayers JW. PMID: 27482907.
      View in: PubMed   Mentions: 6     Fields:    Translation:Humans
    36. US adult smokers' perceptions' of Australia's cigarette warning labels: variance by warning content and consistency across sociodemographic subsegments. Tob Control. 2017 07; 26(4):485-486. Leas EC, Pierce JP, Dimofte CV, Villaseñor A, Strong DR. PMID: 27343227.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    37. News and Internet Searches About Human Immunodeficiency Virus After Charlie Sheen's Disclosure. JAMA Intern Med. 2016 Apr; 176(4):552-4. Ayers JW, Althouse BM, Dredze M, Leas EC, Noar SM. PMID: 26902971.
      View in: PubMed   Mentions: 6     Fields:    Translation:Humans
    38. Leveraging Big Data to Improve Health Awareness Campaigns: A Novel Evaluation of the Great American Smokeout. JMIR Public Health Surveill. 2016 Jan-Jun; 2(1):e16. Ayers JW, Westmaas JL, Leas EC, Benton A, Chen Y, Dredze M, Althouse BM. PMID: 27227151.
      View in: PubMed   Mentions:
    39. Revisiting the Rise of Electronic Nicotine Delivery Systems Using Search Query Surveillance. Am J Prev Med. 2016 06; 50(6):e173-e181. Ayers JW, Althouse BM, Allem JP, Leas EC, Dredze M, Williams RS. PMID: 26876772.
      View in: PubMed   Mentions: 23     Fields:    Translation:Humans
    40. Gender differences influence overweight smokers' experimentation with electronic nicotine delivery systems. Addict Behav. 2015 Oct; 49:20-5. Strong DR, Myers M, Linke S, Leas E, Hofstetter R, Edland S, Al-Delaimy WK. PMID: 26036665.
      View in: PubMed   Mentions: 4     Fields:    Translation:Humans
    41. E-cigarette use in the past and quitting behavior in the future: a population-based study. Am J Public Health. 2015 Jun; 105(6):1213-9. Al-Delaimy WK, Myers MG, Leas EC, Strong DR, Hofstetter CR. PMID: 25880947.
      View in: PubMed   Mentions: 36     Fields:    Translation:Humans
    42. Recall of anti-tobacco advertisements and effects on quitting behavior: results from the California smokers cohort. Am J Public Health. 2015 Feb; 105(2):e90-7. Leas EC, Myers MG, Strong DR, Hofstetter CR, Al-Delaimy WK. PMID: 25521871.
      View in: PubMed   Mentions: 6     Fields:    Translation:Humans
    43. Smokers who report smoking but do not consider themselves smokers: a phenomenon in need of further attention. Tob Control. 2015 Jul; 24(4):400-3. Leas EC, Zablocki RW, Edland SD, Al-Delaimy WK. PMID: 24500273.
      View in: PubMed   Mentions: 6     Fields:    Translation:Humans
    44. Is gray water the key to unlocking water for resource-poor areas of the Middle East, North Africa, and other arid regions of the world? Ambio. 2014 Oct; 43(6):707-17. Leas EC, Dare A, Al-Delaimy WK. PMID: 24165868.
      View in: PubMed   Mentions: 1     Fields:    Translation:PHPublic Health
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