Gregory Zimet

Gregory Zimet
Verified
Gregory verified their affiliation via an institutional email.
Verified
Gregory verified their affiliation via an institutional email.
Indiana University School of Medicine · Pediatrics

PhD

About

534
Publications
545,758
Reads
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31,631
Citations
Introduction
I am Professor Emeritus at Indiana Univ School of Med. I continue to collaborate on vaccination-focused research studies with colleagues in the U.S. and around the world. Along with several colleagues, including my mother, I developed the Multidimensional Scale of Perceived Social Support (MSPSS). Several of my MSPSS publications are available here. For more information on the MSPSS visit this website: http://gzimet.wixsite.com/mspss
Additional affiliations
Indiana University School of Medicine - Lafayette
Position
  • Professor Emeritus
August 1993 - present
Indiana University School of Medicine - Lafayette
Position
  • Professor
Description
  • I work in the Division of Adolescent Medicine, with a focus on research and research mentorship. My primary areas of interest are behavioral/social science approaches to adolescent vaccination (particularly HPV vaccination) and HIV prevention. More recently have have been studying vaccination in general, including facilitators of, and obstacles to, SARS-CoV-2 vaccination.
Education
September 1979 - June 1985
Duke University
Field of study
  • Clinical Psychology
September 1974 - May 1978
Vassar College
Field of study
  • Psychology

Publications

Publications (534)
Article
Background In the United States, human papillomavirus (HPV) vaccination among 27- to 45-y-olds (mid-adults) is recommended based on shared clinical decision making with a health care provider. We developed a patient decision aid tool to support the implementation of this mid-adult HPV vaccination guideline. The purpose of this study was to evaluate...
Article
In the United States, HPV vaccination is available for unvaccinated 27 to 45 year olds based on a shared clinical decision with a health care provider. Since the implementation of the guideline, little has been known about provider perceptions of this recommendation. The purpose of this study was to elucidate health care provider perspectives on HP...
Article
Purpose: Explore mothers of adolescents’ use of social media and the influence of social media on hesitancy regarding HPV vaccine. Methods: A national online survey of mothers of adolescents aged 9–17 years was conducted in August 2023, with participants recruited from an online research panel of US residents. The study examined socio-demographic f...
Article
Full-text available
Background HPV test-based primary cervical screening is replacing cytology in Canada. In other countries, women's unpreparedness and concerns hindered the transition and post-implementation screening uptake. We investigated psychosocial correlates of intentions of screening in eligible individuals to participate in HPV-based primary cervical screen...
Article
Full-text available
Younger adults, aged 18–39 years, exhibit low COVID-19 additional vaccine (i.e., vaccination beyond the original 2-dose series) uptake recommended in Canada. No study has examined how altruistic and individualistic messaging can influence COVID-19 additional dose intentions. The present study aimed to estimate the efficacy of altruism and individua...
Article
Full-text available
Although the human papillomavirus (HPV) vaccine is effective at preventing infection and certain types of cancer, uptake is suboptimal. HPV vaccine requirements for school entry are an underutilized strategy to increase HPV vaccine uptake among adolescents. The purpose of this study was to understand the factors that are predictive of parents’ atti...
Article
Full-text available
Background Mobile Integrated Health-Community Paramedicine (MIH-CP) is a novel approach that may reduce the rural-urban disparity in vaccination uptake in the United States. MIH-CP providers, as physician extenders, offer clinical follow-up and wrap-around services in homes and communities, uniquely positioning them as trusted messengers and vaccin...
Article
Full-text available
In the United States, vaccination rates for many routinely recommended vaccines have recovered to pre-pandemic levels, yet human papillomavirus (HPV) vaccination rates still lag pre-pandemic levels. This study sought to uncover the potential effects of the pandemic on attitudes about the HPV vaccine, and factors associated with changes in attitudes...
Article
Full-text available
Background The Advisory Committee on Immunization Practices issued a shared clinical decision-making (SCDM) recommendation for HPV vaccination in persons aged 27–45. Since expanded eligibility for the vaccine was issued, little information has been available about HPV vaccine behaviors and intentions among women in this age group. Methods We condu...
Article
Full-text available
Men aged 27 to 45 are eligible for human papillomavirus (HPV) vaccination as of 2019, yet relatively little is known about whether they have received or intend to receive it. We conducted a cross-sectional, online survey among fathers aged 27 to 45 between March and April 2022, to assess associations between HPV vaccination awareness, behaviors, in...
Article
Full-text available
Background and Objective Understanding the preferences of women living with HIV (WLH) for the prevention of mother-to-child HIV transmission (PMTCT) services is important to ensure such services are person-centered. Methods From April to December 2022, we surveyed pregnant and postpartum WLH enrolled at five health facilities in western Kenya to u...
Article
Background: Detection of circulating tumor DNA (ctDNA) after neoadjuvant therapy for triple negative breast cancer (TNBC) is associated with increased risk of recurrence. Ongoing trials aim to determine whether knowledge of specific genomic mutations in ctDNA can inform targeted adjuvant therapy to improve prognosis. The impact of knowledge of ctDN...
Article
Objectives. To assess COVID-19 and influenza vaccination rates across Indiana’s 92 counties and identify county-level factors associated with vaccination. Methods. We analyzed county-level data on adult COVID-19 vaccination from the Indiana vaccine registry and 2021 adult influenza vaccination from the Centers for Disease Control and Prevention. We...
Article
Full-text available
The primary objective of this paper is to serve as a valuable resource for policymakers who are confronted with the evolving landscape of the coronavirus disease 2019 (COVID-19), considering both free and cost-based vaccination approaches. The potential consequences of shifting from free to cost-based vaccination are explored, encompassing its impa...
Article
Full-text available
There is a continued need for research to better understand the influence social media has on parental vaccination attitudes and behaviors, especially research capturing the effects of the COVID-19 pandemic. The goal of this study was to explore parents’ perspectives related to the impact the pandemic had on 1) social media engagement, 2) vaccine m...
Preprint
BACKGROUND Parents frequently use social media as a source of information about the HPV vaccine. Our previous work identified that, on Twitter, almost 25% of Tweets about HPV vaccine contain misinformation and these Tweets receive higher audience engagement than accurate Tweets. Exposure to misinformation can increase vaccine hesitancy, but the typ...
Article
Full-text available
Background Differentiated service delivery models are implemented by HIV care programs globally, but models for pregnant and postpartum women living with HIV (PPWH) are lacking. We conducted a discrete choice experiment to determine women's preferences for differentiated service delivery. Setting Five public health facilities in western Kenya. Me...
Article
Full-text available
Understanding factors that influence those who are initially COVID-19 vaccine hesitant to accept vaccination is valuable for the development of vaccine promotion strategies. Using Ipsos KnowledgePanel®, we conducted a national survey of adults aged 18 and older in the United States. We created a questionnaire to examine factors associated with COVI...
Article
Human papillomavirus (HPV) vaccination prevents the development of HPV-associated malignancies. Adolescent and young adult survivors of childhood cancers and patients with sickle cell disease (SCD) are vulnerable patient populations who would significantly benefit from HPV vaccination. In this multimethod study, a retrospective chart review found a...
Article
Objective: The COVID-19 pandemic significantly impacted and continues to impact the health and well-being of Australian adults. However, there has been no instrument validated to comprehensively measure how the COVID-19 pandemic impacted adults in Australia across several domains (e.g. fear of COVID-19, attitudes towards vaccination, psychosocial i...
Article
The Healthy People 2030 goal is for 80% of all adolescents to complete their HPV vaccination series. Per the 2021, National Immunization Survey-Teen (NIS-Teen), 61.7% of adolescents have completed the series, and Indiana lags below the national average (55.2%). The present study estimated the 2-dose HPV vaccine series completion rates across Indian...
Article
Full-text available
Rates of Human papilloma virus (HPV) vaccination among pediatric survivors of cancer and patients with sickle cell disease are lower than the national average. While recent attention has focused on patient HPV vaccine hesitancy and refusal, less is known about provider-level and system-level barriers to vaccinations in pediatric hematology/oncology...
Article
Objective: To examine associations among women's preferred locations for human papillomavirus (HPV) self-sampling in relation to their demographic, social, and health characteristics and their perceived benefits and concerns regarding this procedure. Design: Cross-sectional, descriptive survey. Setting: Online distribution between March 2022 a...
Article
Using a cluster-randomized trial design, we aimed to evaluate a complex intervention to increase uptake of human papillomavirus (HPV) vaccination in schools. The study was undertaken in high schools in Western Australia and South Australia between 2013 and 2015 with adolescents aged 12-13 years. Interventions included education, shared decision-mak...
Article
Although the US Advisory Committee on Immunization Practices recommends vaccinating adolescents against the human papillomavirus (HPV) to prevent HPV-associated cancers, vaccine initiation and completion rates are suboptimal. Parental and provider hesitancy contributes significantly to low HPV vaccine uptake. This review describes sources of HPV va...
Article
COVID-19 vaccination of U.S. children lags behind adult vaccination, but remains critical in mitigating the pandemic. Using a subset of a nationally representative survey, this study examined factors contributing to parental uptake of COVID-19 vaccine for children ages 12-17 and 5-11, stratified by parental COVID-19 vaccination status. Among vaccin...
Article
Background: Improving household emergency preparedness (EP) is a public health priority, yet little is known about what influence the COVID-19 pandemic had on families' EP. This study aimed to explore current EP attitudes and behaviors. Methods: We conducted online focus groups in Winter 2022 with a nationwide sample of parents of adolescents. W...
Article
Full-text available
COVID-19 vaccine-induced immunity wanes over time, and with the emergence of new variants, additional “booster” doses have been recommended in Canada. However, booster vaccination uptake has remained low, particularly amongst younger adults aged 18–39. A previous study by our research team found that an altruism-eliciting video increased COVID-19 v...
Article
Full-text available
The World Health Organization has designated vaccine hesitancy and vaccine confidence among the most pressing issues in global health. The COVID-19 pandemic has made vaccine hesitancy and vaccine confidence particularly salient and urgent. The purpose of this special issue is to highlight a broad range of perspectives on these critical issues. We h...
Article
Full-text available
Background: COVID-19 vaccines are now available under Emergency Use Authorization for children ages 6 months to 5 years. We examined parents' intentions to vaccinate their children under the age of 5 years and assessed whether their confidence in making an informed decision about vaccination (decision self-efficacy) was associated with these inten...
Article
Full-text available
State vaccine requirements are a tool for improving child and adolescent vaccination immunization coverage, but to be effective, parental buy-in is needed. The objective of this study was to assess the demographic, healthcare characteristics, and health beliefs associated with parental acceptance of general and HPV-specific state vaccine requiremen...
Article
HPV vaccination rates remain suboptimal in the United States. While the current literature focuses on expressly hesitant parents, few studies have examined parents with "high intent", or those indicating they definitely will vaccinate and have had the opportunity but not yet vaccinated their adolescents. Our objective was to differentiate character...
Preprint
Background: Human papilloma virus (HPV) vaccination prevents the development of HPV-associated malignancies. Adolescent and young adult (AYA) survivors of childhood cancers and patients with sickle cell disease (SCD) are two vulnerable patient populations who would significantly benefit from HPV vaccination. Objective: In this mixed method study we...
Preprint
Full-text available
The COVID-19 pandemic significantly impacted and continues to impact the health and well-being of Australian adults. However, there has been no instrument validated to comprehensively measure how the COVID-19 pandemic impacted adults in Australia across several domains (e.g. fear of COVID-19, attitudes towards vaccination, impact of lockdowns on ps...
Article
Full-text available
The disrupted introduction of the HPV-based cervical screening program in several jurisdictions has demonstrated that the attitudes and beliefs of screening-eligible persons are critically implicated in the success of program implementation (including the use of self-sampling). As no up-to-date and validated measures exist measuring attitudes and b...
Article
Purpose: Minor adolescents are often excluded from HIV prevention clinical trials due to unresolved ethical issues. Their under-representation in research leads to delayed access to new HIV prevention approaches. We examine the relationship between consent procedures, trial features, demographic and social characteristics, and minor adolescents' w...
Article
Full-text available
Knowledge of cervical cancer and HPV testing are important factors in proactive and continued engagement with screening and are critical considerations as countries move towards the implementation of HPV-based primary screening programs. However, existing scales measuring knowledge of both cervical cancer and HPV testing are not up to date with the...
Article
Purpose The first vaccine against SARS-CoV-2 (COVID-19) for adolescents 16 years and older in the United States received Emergency Use Authorization in December 2020. Soon after its approval, parents expressed concerns about vaccine safety for adolescents. Similar concerns about vaccine safety partially explain suboptimal human papillomavirus (HPV)...
Article
Full-text available
Since the outbreak of COVID-19, many conspiracy theories have spread widely, which has the potential to reduce adherence to recommended preventive measures. Specifically, anti-vaccine conspiracy beliefs can have a strong negative impact on COVID-19 vaccination attitude and intention. The present study aimed to clarify how such beliefs can reduce va...
Article
Full-text available
Financial incentives are one of several strategies that have been explored to enhance COVID-19 vaccine uptake. Although widely discussed, it is unclear how much of an incentive and for which subset of individuals incentives would be effective. This study explored the impact of hypothetical $600 or $1200 incentives on COVID-19 vaccination intention....
Article
Introduction: Chlamydia vaccines are currently under development and have the potential to lower incidence of infection and disease, which are highest among adolescents and young adults. Ideally, a chlamydia vaccine would be administered to adolescents before sexual debut, a time when parents are the primary vaccine decision-makers. This study exp...
Article
Background: Chlamydia vaccination is a potentially important strategy to prevent infections and reduce the global burden of disease. Ideally, chlamydia immunization programs would require vaccinating adolescents before they engage in sexual activity. Communication by health care providers (HCPs) has been shown to have an impact on vaccine acceptan...
Article
Full-text available
Introduction: This study aimed to investigate HPV vaccination intention among adult married women aged 27 to 45 years and its associated factors, and their spouse/partner’s influence on HPV vaccination decision-making. Methods: This is a cross-sectional, questionnaire-based study. Study participants were recruited through simple random sampling of...
Article
Full-text available
Background: The human papillomavirus (HPV) test has emerged as a significant improvement over cytology for primary cervical cancer screening. In Canada, provinces and territories are moving toward implementing HPV testing in cervical cancer screening programs. Although an abundance of research exists on the benefits of HPV-based screening, there i...
Article
Full-text available
Human papillomavirus (HPV) vaccination rates in the U.S. are relatively low. Provider recommendation rates for HPV vaccination often vary by patient age and relationship status. Obstetrician/gynecologists (OB/GYNs) represent a key provider group that can recommend the HPV vaccine. This study examined differences in OB/GYN recommendation of HPV vacc...
Article
Full-text available
Widespread uptake of COVID-19 vaccination is vital to curtailing the pandemic, yet rates remain suboptimal in the U.S. Vaccine mandates have previously been successful, but are controversial. An April 2021 survey of a nationally representative sample (N = 1208) examined vaccine uptake, attitudes, and sociodemographic characteristics. Sixty-seven pe...
Article
Full-text available
We aimed to assess the Iranian people’s attitude and confidence in the COVID-19 vaccine, their concerns about the safety of vaccines, and their reasons for accepting or rejecting the COVID-19 vaccine. We conducted a web-based cross-sectional study with a mixed qualitative–quantitative approach from December 2020 to February 2021. Our questionnaire...
Preprint
BACKGROUND The human papillomavirus (HPV) test has emerged as a significant improvement over cytology for primary cervical cancer screening. In Canada, provinces and territories are moving toward implementing HPV testing in cervical cancer screening programs. Although an abundance of research exists on the benefits of HPV-based screening, there is...
Article
This study used uncertainty management theory to assess mothers’ COVID-19-related uncertainty sources and management strategies during the Delta variant outbreak as the fall 2021 school year approached. Twenty-five mothers living in Indiana were interviewed between July-August 2021. Data indicated four uncertainty sources: COVID-19 illness risk, ch...
Article
Full-text available
Men involvement in HPV vaccine advocacy is important in a patriarchal society. This study aimed to investigate the influence of men on HPV vaccination of adult women. An online cross-sectional survey was undertaken between June and August 2019. Participants were fathers of children enrolled in schools in Fujian Province. A total of 1953 participant...
Preprint
Full-text available
Introduction The Human Papillomavirus (HPV) test has emerged as a significant improvement over cytology for primary cervical cancer screening. In Canada, provinces and territories are moving towards implementing HPV testing in cervical cancer screening programs. While an abundance of research exists on the benefits of HPV-based screening, there is...
Article
Full-text available
As of 05/28/2021, SARS-CoV-2 (COVID-19) had caused 3.9 million infections in the United States (US) pediatric population since its discovery in December of 2019. The development and expansion of vaccination has markedly changed the shape of the epidemic. In this qualitative study, we report on pediatric hematology/oncology provider views on the COV...
Article
Full-text available
Although there has been extensive exploration of public opinion surrounding many non-pharmaceutical interventions (NPIs) aimed at mitigating transmission of SARS-CoV-2 (e.g. mask-wearing and social distancing), there has been less discussion of the public’s perception of the ethical appropriateness other NPIs. This paper presents the results of a s...
Article
Full-text available
Containing the COVID-19 pandemic is dependent on compliance with public health recommendations and mandates which is lower in younger compared to older adults. Furthermore, younger adults have demonstrated lower uptake of COVID-19 vaccines. The aim of this study was to assess preferences for COVID-19 related preventive health measures and vaccinati...
Article
Full-text available
Background Obstetrician/gynecologists (OB/GYNs) are well poised to vaccinate girls and young women against HPV, however little is known about if and how they recommend the HPV vaccine. This study aims to understand factors associated with strong and frequent HPV vaccine recommendations among OB/GYNs for patients 26 years and younger. Methods 224 p...
Article
Full-text available
Given low rates of uptake of the COVID-19 vaccine for children 12–17 and 5–11 years old, research is needed to understand parental behaviors and behavioral intentions related to COVID-19 vaccination for their children. In the state of Indiana, we conducted a non-random, online survey of parents or caregivers (N = 10,266) about their COVID-19 vaccin...
Preprint
Full-text available
Containing the COVID-19 pandemic is dependent on compliance with public health recommendations and mandates which is lower in younger compared to older adults. Furthermore, younger adults have demonstrated lower uptake of COVID-19 vaccines. The aim of this study was to assess preferences for COVID-19 related preventive health measures and vaccinati...
Preprint
Full-text available
BACKGROUND High COVID-19 vaccine uptake is crucial to containing the pandemic and reducing hospitalizations and deaths. Younger adults (aged 20-39) have demonstrated lower levels of vaccine uptake compared to older adults while being more likely to transmit the virus due to a higher number of social contacts. Consequently, this age group has been i...
Article
Full-text available
Background: High COVID-19 vaccine uptake is crucial to containing the pandemic and reducing hospitalizations and deaths. Younger adults (aged 20-39) have demonstrated lower levels of vaccine uptake compared to older adults while being more likely to transmit the virus due to a higher number of social contacts. Consequently, this age group has been...
Article
Background: In 2015, the Advisory Committee on Immunization Practices recommended Meningococcal B vaccination for healthy 16-23 year-olds based on shared clinical decision-making between the patient and the provider. There has been some confusion regarding how to implement this recommendation. Methods: Through discussions among the authors, a re...
Article
Background: Improving household emergency preparedness (EP) is a public health priority, yet little is known about what influence the COVID-19 pandemic had on families' EP. This study aimed to explore current EP atti- tudes and behaviors. Methods: We conducted online focus groups in Winter 2022 with a nationwide sample of parents of adolescents. We...
Article
Full-text available
Introduction In December 2020, the first two COVID-19 vaccines were approved in the United States (U.S.) and recommended for distribution to front-line personnel, including nurses. Nursing students are being prepared to fill critical gaps in the health care workforce and have played important supportive roles during the current pandemic. Research h...
Article
Full-text available
Background: Adolescent/young adult (AYA) patients with hematologic and oncologic conditions are at increased risk for complications of COVID-19 and thus are important targets for vaccine outreach. AYA patients are transitioning from relying upon parental vaccine decision-making to independently making their own decisions. AYA with sickle cell disea...
Article
Full-text available
Background The availability of various types of COVID-19 vaccines and diverse characteristics of the vaccines present a dilemma in vaccination choices, which may result in individuals refusing a particular COVID-19 vaccine offered, hence presenting a threat to immunisation coverage and reaching herd immunity. The study aimed to assess global COVID-...
Code
Multidimensional Scale of Perceived Social Support in the Bengali language, a language that is widely spoken in Bangladesh, Lesotho, and parts of India.
Article
Full-text available
IMPORTANCE: Delivery of vaccination to adolescents via a school-based program provides an opportunity to promote their involvement in health decision-making, service provision, and self-efficacy (belief in one’s ability to perform a certain behavior). OBJECTIVE: To examine the effect of a human papillomavirus (HPV) vaccination education and logist...
Article
Introduction Humanpapillomavirus (HPV) has infected nearly 80 million people in the U.S., and is associated with most cervical cancer cases. Alabama ranks first in the country for cervical cancer mortality and third for incidence. Although the HPV vaccine can prevent HPV and reduce cancer rates, Alabama is well-below the national average for HPV va...
Data
This document contains a list of many of the articles that have reported on the psychometric characteristics of the MSPSS
Article
Purpose: National and International guidelines recommend the use of one dose of intravesical chemotherapy immediately following surgery for non-muscle invasive bladder cancer, which is performed infrequently on a population level. We sought to understand the importance of potential environmental and clinical dimensions involved in the decision to...
Article
This study examined associations between general attitudes toward seeking medical care, attitudes about vaccines/fear of shots, and human papillomavirus (HPV) vaccine uptake and intentions in college women. Hypothesized associations were framed by the Theory of Planned Behavior (TPB). Participants ( N = 330, mean age = 18.9 years, 75% White) comple...