Thaddeus A. Herzog, PhD

Thaddeus A. Herzog, PhD

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Full Member, Population Sciences in the Pacific Program (Cancer Prevention in the Pacific), University of Hawaiʻi Cancer Center

Academic Appointment(s):
Associate Researcher (Associate Professor), University of Hawaiʻi Cancer Center
Graduate Faculty, Office of Public Health Studies

PhD, MA, Social Psychology, Harvard University

Research Focus

My major research focus in recent years has been areca nut (i.e., "betel nut") use and cessation in Guam, Saipan, and the Asia-Pacific region. With an estimated 600 million users globally, areca nut ranks as the fourth most frequently consumed psychoactive substance in the world, following only nicotine, alcohol, and caffeine. Areca nut has been designated by the International Agency for Research on Cancer (IARC) as a Group 1 carcinogen. Currently, very little is known about how to reduce the cancer risk associated with areca nut chewing. I am funded currently by a National Cancer Institute (NCI) U54 grant; the specific aim of which is to investigate the efficacy of an intensive areca nut cessation program in Guam and Saipan. This is the first known randomized intervention trial for areca nut cessation. The areca nut cessation grant was one of two large research projects that comprised the competitive renewal U54 application to the NCI. In addition to my research in the Pacific, I have collaborations with senior researchers in Malaysia, Sri Lanka, and Taiwan, studying areca nut use and cessation, and I was invited by the NCI to be a plenary speaker at the first International Conference on Betel Quid and Areca in Kuala Lumpur in April 2016.

In addition to my more recent areca nut research program, I continue to research smoking cessation, e-cigarettes, and motivation to quit smoking. I was recently Principal Investigator for a NCI-funded R01 smoking cessation trial. I also have been PI on two other National Institutes of Health (NIH) grants related to smoking cessation, and Co-Investigator on several other NIH grants on the topic of smoking cessation. I have published extensively on the topic of smoking cessation, frequently as first author or senior author. More recently, my colleagues and I have published on the topic of electronic cigarettes ("e-cigarettes"). In relation to my smoking cessation research, I have written extensively and critically about stage models of health behavior change.

Selected Publications

Herzog TA, Pokhrel P, Kawamoto CT. (2015). Short-term fluctuations in motivation to quit smoking in a sample of smokers in Hawaii. Substance Use & Misuse 50, 236-241. PubMed PMID: 25338289; PubMed Central PMCID: PMC4387002.

Herzog TA, Murphy KL, Little MA, Suguitan GS, Pokhrel P, Kawamoto CT. (2014). The Betel Quid Dependence Scale: replication and extension in a Guamanian sample. Drug and Alcohol Dependence 138, 154-160. PubMed PMID: 24629627; PubMed Central PMCID: PMC4010585.

Little MA, Pokhrel P, Murphy KL, Kawamoto CT, Suguitan GS, Herzog TA. (2014). Intention to quit betel quid: a comparison of betel quid chewers and cigarette smokers. Oral Health and Dental Management 13, 512-518. PubMed PMID: 24984674; PubMed Central PMCID: PMC4386761.

Little MA, Pokhrel P, Murphy KL, Kawamoto CT, Suguitan GS, Herzog TA. (2014). The reasons for betel-quid chewing scale: assessment of factor structure, reliability, and validity. BMC Oral Health 14, 62. PubMed PMID: 24889863; PubMed Central PMCID: PMC4059468.

Pokhrel P, Fagan P, Little MA, Kawamoto CT, Herzog TA. (2013). Smokers who try e-cigarettes to quit smoking: findings from a multiethnic study in Hawaii. American Journal of Public Health 103, e57-62. PubMed PMID: 23865700; PubMed Central PMCID: PMC3780693.

Publication list via PubMed

Active Grants

T. Herzog, Co-Investigator; P. Pokhrel, PI
National Cancer Institute
1 R01 CA20227701
"Prospective Effects of Electronic Cigarette Marketing on Expectancies and Behavior"

T. Herzog, Project PI; C. Vogel, N. Palafox, D. Ward, MPIs
National Cancer Institute
Funded through UH Cancer Center/University of Guam U54 competitive renewal grant
2 U54 CA143727
"The Betel Nut Intervention Trial (BENIT)"