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Torres-Alvarez R, Jeon J, Levy DT, Meza R. Birth-cohort patterns of e-cigarette and other tobacco use among adolescents in the US. Prev Med 2024; 185:108049. [PMID: 38906278 PMCID: PMC11269000 DOI: 10.1016/j.ypmed.2024.108049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 06/17/2024] [Accepted: 06/18/2024] [Indexed: 06/23/2024]
Abstract
BACKGROUND E-cigarette use has increased considerably among US adolescents. While many studies have described cross-sectional prevalence trends of youth e-cigarette use, less is known about cohort or generational initiation and use patterns. METHODS We used data from the US National Youth Tobacco Survey (NYTS) from 2014 to 2022 and age-period-cohort models to analyze age-specific patterns of e-cigarette use initiation and prevalence by cohort and calendar. For comparison, we also examined initiation and prevalence for cigarettes, cigars, and smokeless tobacco, using NYTS data from 1999 to 2022. RESULTS Age-specific e-cigarette initiation and prevalence varied considerably by calendar year and birth cohort. There was a rapid increase in e-cigarette initiation and prevalence starting with the 1995 birth cohort, peaking with the 2005 birth cohort, and showing signs of decline with more recent cohorts. In contrast, there were substantial continuous reductions in cigarette, cigar, and smokeless use initiation and prevalence by birth cohort. While the reductions in cigarette smoking started with the 1980s birth cohorts, cigar and smokeless initiation and prevalence did not decrease until the 1990-1995 cohorts. CONCLUSIONS Despite their recent emergence, e-cigarette use has varied considerably across US adolescent cohorts. After early increases, e-cigarette use and initiation peaked with the 2005 birth cohort. These patterns are in contrast with the continuous decreases by cohort in cigarette, cigar, and smokeless use and initiation. As the tobacco product landscape continues to evolve, it will be essential to monitor patterns of use of adolescent and young adult cohorts as they age into adulthood.
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Affiliation(s)
- Rossana Torres-Alvarez
- Department of Integrative Oncology, BC Cancer Research Institute, Vancouver, British Columbia, Canada; School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jihyoun Jeon
- Department of Epidemiology, University of Michigan, Ann Arbor, MI, USA
| | - David T Levy
- Department of Oncology, Georgetown University, Washington, DC, USA
| | - Rafael Meza
- Department of Integrative Oncology, BC Cancer Research Institute, Vancouver, British Columbia, Canada; School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada; Department of Epidemiology, University of Michigan, Ann Arbor, MI, USA.
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Freitas-Lemos R, Tegge AN, Shevorykin A, Tomlinson DC, Athamneh LN, Stein JS, Sheffer CE, Shields PG, Hatsukami DK, Bickel WK. Selective Reduction of Socioeconomic Disparities in the Experimental Tobacco Marketplace: Effects of Cigarette and E-cigarette Flavor Restrictions. Nicotine Tob Res 2024; 26:S103-S111. [PMID: 38817033 PMCID: PMC11140227 DOI: 10.1093/ntr/ntad070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/30/2023] [Accepted: 05/05/2023] [Indexed: 06/01/2024]
Abstract
INTRODUCTION Cigarette smoking accounts for >30% of the socioeconomic gap in life expectancy. Flavored restrictions claim to promote equity; however, no previous studies have compared the effect of cigarette and e-cigarette flavor restrictions among individuals who smoke with lower and higher socioeconomic status (SES). AIMS AND METHODS In a between-group within-subject design, individuals with lower (n = 155) and higher (n = 125) SES completed hypothetical purchasing trials in the experimental tobacco marketplace (ETM). Conditions were presented in a 2 × 2 factorial design (cigarette flavors restricted or unrestricted and e-cigarette flavors restricted or unrestricted) with increasing cigarette prices across trials. RESULTS Results show (1) SES differences in cigarette, e-cigarette, and NRT purchases under unrestricted policies, with lower SES showing higher cigarette demand and lower e-cigarette and NRT substitution than higher SES, (2) cigarette restrictions decreased cigarette and increased NRT purchases among lower SES, but no significant changes among higher SES, (3) decreased SES differences in cigarette demand under cigarette restrictions, but persistence under e-cigarette restrictions or their combination, (4) persistence of SES differences in e-cigarette purchases when all restrictions were enforced, and (5) waning of SES differences in NRT purchasing under all restrictions. CONCLUSIONS Flavor restrictions differentially affected individuals based on SES. Within-group comparisons demonstrated restrictions significantly impacted lower SES, but not higher SES. Between-group comparisons showed SES differences in cigarette purchasing decreased under cigarette restrictions, but persisted under e-cigarette-restrictions or their combination. Additionally, SES differences in NRT substitution decreased under flavor restrictions. These findings highlight the utility of the ETM to investigate SES disparities. IMPLICATIONS With increasing trends of socioeconomic differences in smoking prevalence and cessation rates, smoking-related health disparities are expected to continue to widen. Restricting menthol flavor in cigarettes while enhancing the availability and affordability of NRT have the potential to alleviate SES disparities in tobacco use, therefore, positively impacting health equity. However, this effect may depend on flavor availability in other tobacco products.
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Affiliation(s)
| | - Allison N Tegge
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, VA, USA
- Department of Statistics, Virginia Tech, Blacksburg, VA, USA
| | - Alina Shevorykin
- Department of Health Behavior, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Devin C Tomlinson
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, VA, USA
- Graduate Program in Translational Biology, Medicine, and Health, Virginia Tech, Blacksburg, VA, USA
| | - Liqa N Athamneh
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, VA, USA
| | - Jeffrey S Stein
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, VA, USA
| | - Christine E Sheffer
- Department of Health Behavior, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Peter G Shields
- Comprehensive Cancer Center, Ohio State University and James Cancer Hospital, Columbus, OH, USA
| | - Dorothy K Hatsukami
- Masonic Cancer Center and Department of Psychiatry and Behavioral Sciences, University of Minnesota, Minneapolis, MN, USA
| | - Warren K Bickel
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, VA, USA
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Cook S, Ortiz Chavez S, Zavala-Arciniega L, Hirschtick JL, Fleischer NL. Trends of Single, Dual, and Polytobacco Use Among School-Based Students in the United States: An Analysis of the National Youth Tobacco Survey. Am J Health Promot 2023; 37:1078-1090. [PMID: 37495509 DOI: 10.1177/08901171231191557] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
PURPOSE To examine trends in single, dual, and polytobacco use between 2014-2020 for US youth and to identify disparities in these trends by grade level, sex, and race/ethnicity. DESIGN A secondary analysis of the National Youth Tobacco Survey (NYTS). SUBJECTS A total of 122 566 students. MEASURES Past 30-day exclusive use of cigarettes, e-cigarettes, other combustibles (cigars, little cigars, cigarillos, hookah, pipe tobacco, bidis) and smokeless tobacco (snus, smokeless, dissolvable); dual use of each product with e-cigarettes; polyuse with e-cigarettes; dual/polyuse without e-cigarettes. ANALYSIS Multivariable modified Poisson regression. RESULTS Compared to 2014, exclusive e-cigarette use (APR = 2.51, 95% CI: 1.96, 3.21) trended upward while exclusive cigarette (APR = .34, 95% CI: .23, .50), 'other' combustibles (APR = .47, 95% CI: .37, .58), and smokeless tobacco (APR = .40, 95% CI: .25, .65) use trended downward in 2020. Polytobacco use with and without e-cigarettes trended downward in 2020 compared to 2014. We also saw differences in trends across sociodemographic groups. Comparing 2020 to 2014, exclusive e-cigarette use was higher for females than males, 'other' combustible tobacco use remained stable for Non-Hispanic Black students but decreased for other racial/ethnic groups, and dual e-cigarette/cigarette use trended upward more for middle school students than high school students. CONCLUSIONS Despite decreased trends in tobacco product use without e-cigarettes between 2014-2020, differences in tobacco product use trends by grade level, sex, and race/ethnicity were identified. Prevention efforts targeting disparities in tobacco product use are needed.
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Affiliation(s)
- Steven Cook
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Stephany Ortiz Chavez
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Luis Zavala-Arciniega
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Jana L Hirschtick
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Nancy L Fleischer
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
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Mattingly DT, Elliott MR, Fleischer NL. Latent Classes of Tobacco and Cannabis Use among Youth and Young Adults in the United States. Subst Use Misuse 2023; 58:1235-1245. [PMID: 37259849 PMCID: PMC10450693 DOI: 10.1080/10826084.2023.2215312] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Background: Research characterizing patterns of tobacco and cannabis use by product type and route of administration among youth and young adults (YAs) is limited. Methods: We conducted latent class analysis of tobacco and cannabis use (i.e., cigarettes, electronic nicotine delivery systems (ENDS), cigars, blunts, cannabis vaping, and other cannabis use (without blunting/vaping)) among youth (ages 15-17) and YAs (ages 18-24) who used at least one product in the past 30 days, using data from the Population Assessment of Tobacco and Health Study (Wave 4, 2016-2017). We used multinomial logistic regression models to examine associations between sociodemographic characteristics and use classes. Results: The latent use classes for youth included cigarettes (2.5%), ENDS (2.6%), blunts (2.5%), other cannabis (6.3%), ENDS + cannabis vaping (2.7%), and cigarettes + cigars + other cannabis (1.5%), while the latent use classes for YAs included cigarettes (11.7%), ENDS (3.9%), blunts (5.3%), other cannabis (7.0%), cigarettes + cigars (8.2%), and cigarettes + ENDS + cannabis vaping (4.9%). We compared use classes to never/former use for youth (82.0%) and YAs (59.0%) and found that they differed by each sociodemographic characteristic. For example, non-Hispanic Black YAs had higher odds of cigarettes + cigar use compared to non-Hispanic White YAs, whereas racial/ethnic minority youth and YAs had lower odds of other dual/poly use groups compared to their non-Hispanic White counterparts. Conclusions: We observed differences in use classes by sociodemographic characteristics for youth and YAs. Health professionals must consider tobacco and cannabis use patterns when implementing prevention and cessation interventions.
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Affiliation(s)
- Delvon T. Mattingly
- Center for Social Epidemiology and Population Health, Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI 48109, USA
| | - Michael R. Elliott
- Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, MI 48109
- Survey Research Center, Institute for Social Research, University of Michigan, Ann Arbor, MI 48104
| | - Nancy L. Fleischer
- Center for Social Epidemiology and Population Health, Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI 48109, USA
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Park-Lee E, Gentzke AS, Ren C, Cooper M, Sawdey MD, Hu SS, Cullen KA. Impact of Survey Setting on Current Tobacco Product Use: National Youth Tobacco Survey, 2021. J Adolesc Health 2023; 72:365-374. [PMID: 36470692 PMCID: PMC11036859 DOI: 10.1016/j.jadohealth.2022.10.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 09/29/2022] [Accepted: 10/13/2022] [Indexed: 12/12/2022]
Abstract
PURPOSE To examine whether survey setting was associated with youth reporting of current (past 30-day) use of any tobacco product, e-cigarettes, cigarettes, and cigars. METHODS Data from the 2021 National Youth Tobacco Survey (NYTS) were used to estimate the prevalence of current use of any tobacco product, e-cigarettes, cigarettes, and cigars by survey setting, sociodemographic characteristics, peer tobacco use, and other tobacco product use. Multivariable regression was used to test the impact of survey setting on current tobacco use. Tobacco access sources among current users were compared by survey setting. RESULTS Among students who participated in the 2021 NYTS, 50.8% reported taking the survey on school campus and 49.2% at home/other place. The prevalence of current use of any tobacco product, e-cigarettes, cigarettes, and cigars was higher among students completing the survey on school campus than at home/other place. After adjusting for covariates, this association persisted only for current use of any tobacco product (adjusted odds ratio = 1.57; 95% confidence interval, 1.28-1.91) and e-cigarettes (adjusted odds ratio = 1.43; 95% confidence interval, 1.20-1.71). Current users reported similar sources of access to tobacco products, regardless of survey setting. DISCUSSION The likelihood of youth reporting current use of any tobacco product and e-cigarettes differed by survey setting. Such differences could be due to lack of privacy at home, peer influence in school settings, and other unmeasured characteristics. Methodological changes were made due to COVID-19; caution is warranted in comparing results from the 2021 NYTS with those of previous or future NYTS conducted primarily on school campus.
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Affiliation(s)
- Eunice Park-Lee
- Center for Tobacco Products, Food and Drug Administration, Silver Spring, Maryland.
| | - Andrea S Gentzke
- Office on Smoking and Health, National Center for Chronic Disease Prevention and Health Promotion, CDC, Atlanta, Georgia
| | - Chunfeng Ren
- Center for Tobacco Products, Food and Drug Administration, Silver Spring, Maryland
| | - Maria Cooper
- Center for Tobacco Products, Food and Drug Administration, Silver Spring, Maryland
| | - Michael D Sawdey
- Center for Tobacco Products, Food and Drug Administration, Silver Spring, Maryland
| | - S Sean Hu
- Office on Smoking and Health, National Center for Chronic Disease Prevention and Health Promotion, CDC, Atlanta, Georgia
| | - Karen A Cullen
- Center for Tobacco Products, Food and Drug Administration, Silver Spring, Maryland
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Sleep troubles in adolescence relate to future initiation of ENDS USE: A longitudinal cohort design using the PATH study waves 4.5–5 (2017–2019). Prev Med Rep 2022; 30:102000. [PMID: 36203945 PMCID: PMC9530947 DOI: 10.1016/j.pmedr.2022.102000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 09/20/2022] [Accepted: 09/24/2022] [Indexed: 11/22/2022] Open
Abstract
First longitudinal study on the association between sleep trouble and ENDS use. Past year sleep trouble increased risk of initiating ENDS use in following year. Healthy sleep serves as a protective factor against ENDS uptake for youth. Nearly half of youths aged 12–17, experienced sleep troubles during wave 4.5. Sleep classes for youth/delayed school start times may help deter future ENDS use.
In a recent study, we demonstrated a relationship between self-reported sleep deprivation and youth susceptibility to initiate electronic nicotine delivery systems (ENDS) use; however, we were hampered by cross-sectional data. This study builds on our previous work by performing secondary analysis using the nationally representative Population Assessment of Tobacco and Health study datasets from wave 4.5 (2017–2018) and wave 5 (2018–2019) among respondents aged 12–17. Using a longitudinal cohort design, we assessed the extent self-reported sleep troubles at wave 4.5 related to transition from never-to-ever ENDS use by wave 5. We assessed youth who reported never having used any type of tobacco previously and who reported not using alcohol or other illicit substances the previous year. We ran four Poisson regression models on the dependent variable never-to-ever ENDS users at wave 5 and self-reported sleep troubles in the past year at wave 4.5. We controlled for demographic and sociographic factors and, in our final model, tobacco availability in home, exposure to ENDS advertising on social media, past year anxiety, depression, body mass index, physical activity, close friends that use ENDS, perceived harm of ENDS, school performance, sensation seeking, and the susceptibility of youth to initiate ENDS. Even when controlling for these factors, sleep troubles at wave 4.5 significantly and positively related to ENDS initiation by wave 5 (Past year sleep trouble: RR = 1.48 95 % CI = [1.14–1.93]). This key and novel finding has important implications for preventing youth ENDS use via protective self-care and social-environmental approaches.
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Usidame B, Hirschtick JL, Mattingly DT, Patel A, Patrick ME, Fleischer NL. Sociodemographic Patterns of Exclusive and Dual Combustible Tobacco and E-Cigarette Use among US Adolescents-A Nationally Representative Study (2017-2020). INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:2965. [PMID: 35270656 PMCID: PMC8910207 DOI: 10.3390/ijerph19052965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 02/24/2022] [Accepted: 03/01/2022] [Indexed: 12/10/2022]
Abstract
This study assessed the sociodemographic predictors of exclusive and dual use of the most frequently used nicotine/tobacco products, e-cigarettes, and combustible tobacco among adolescents. Cross-sectional data was from the 2017-2020 Monitoring the Future nationally representative study of eighth, tenth, and twelfth-grade students. We coded past 30 day nicotine/tobacco use into four mutually exclusive categories: no use, e-cigarette use only, combustible use (cigarette or cigar) only, and dual use (e-cigarette and combustible). We pooled the 2017-2020 data to examine the relationship between sex, race/ethnicity, parental education, and each product-use category using multinomial logistic regression, stratified by grade level. Among eighth (N = 11,189), tenth (N = 12,882), and twelfth graders (N = 11,385), exclusive e-cigarette use was the most prevalent pattern (6.4%, 13.2%, 13.8%, respectively), followed by dual use (2.7%, 4.5%, 8.9%), and exclusive combustible use (1.5%, 2.5%, 5.3%). eighth and tenth-grade adolescents whose highest parental education was a 4-year college degree or more had lower odds of exclusive combustible and dual use when compared to adolescents whose highest parental education was less than a high school degree. Research should continue to monitor the differential use of combustible tobacco products and e-cigarettes among adolescents from low socioeconomic status backgrounds or racial/ethnic minority households to inform ongoing and future interventions or policies.
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Affiliation(s)
- Bukola Usidame
- School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA; (J.L.H.); (D.T.M.); (A.P.); (N.L.F.)
| | - Jana L. Hirschtick
- School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA; (J.L.H.); (D.T.M.); (A.P.); (N.L.F.)
| | - Delvon T. Mattingly
- School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA; (J.L.H.); (D.T.M.); (A.P.); (N.L.F.)
| | - Akash Patel
- School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA; (J.L.H.); (D.T.M.); (A.P.); (N.L.F.)
| | - Megan E. Patrick
- Institute for Social Research, University of Michigan, Ann Arbor, MI 48106, USA;
| | - Nancy L. Fleischer
- School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA; (J.L.H.); (D.T.M.); (A.P.); (N.L.F.)
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Usidame B, Hirschtick J, Zavala-Arciniega L, Mattingly DT, Patel A, Meza R, Levy DT, Fleischer NL. Exclusive and dual menthol/non-menthol cigarette use with ENDS among adults, 2013-2019. Prev Med Rep 2022; 24:101566. [PMID: 34976632 PMCID: PMC8683962 DOI: 10.1016/j.pmedr.2021.101566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 08/11/2021] [Accepted: 09/15/2021] [Indexed: 11/24/2022] Open
Abstract
This study examines patterns of use for menthol/non-menthol cigarettes and Electronic Nicotine Delivery Systems (ENDS) from 2013 to 2019 among U.S. adults. We calculated the weighted population prevalence of current exclusive and dual use for each product (i.e., menthol/non-menthol cigarettes and ENDS) stratified by age, sex, race/ethnicity, household income, and education in all surveys using data from three nationally representative surveys: the Population Assessment of Tobacco and Health (PATH) Study Waves 1–4 (W1-W4), 2013–2018; the National Health Interview Survey (NHIS) 2015; and the Tobacco Use Supplement to the Current Population Survey (TUS-CPS) 2014–2015 (T1) and 2018–2019 (T2). Exclusive non-menthol cigarette use (PATH: 9.0%W1, 9.4%W4; NHIS: 8.7%; TUS-CPS: 8.1%T1, 6.9%T2) and dual non-menthol cigarette/ENDS use (PATH: 2.4%W1, 1.5%W4; NHIS: 1.5%; TUS-CPS: 1.1%T1, 0.6%T2) were the most common single and dual tobacco use patterns, respectively, across all surveys. Both exclusive menthol cigarette use (3.9%T1-3.3%T2) and non-menthol cigarette use (8.1%T1-6.9%T2) declined in TUS-CPS from 2014/5–2018/9. Dual menthol cigarette/ENDS use also declined (PATH: 1.5%W1-1.1%W4; TUS-CPS: 0.5%T1-0.3%T2), as did dual non-menthol cigarette/ENDS use (PATH: 2.4%W1-1.5%W4; TUS-CPS 1.1%T1-0.6%T2). Across surveys, exclusive menthol cigarette use and dual menthol cigarette/ENDS use were more common among individuals aged 25–34 years old; non-Hispanic Blacks (NHBs); and low-income earners. Single and dual use patterns of menthol/non-menthol cigarettes and ENDS have declined over time. Nevertheless, certain vulnerable population groups, including NHBs and low-income earners, disproportionately use exclusive menthol cigarettes and dual menthol cigarette/ENDS, making menthol bans a potential policy target for reducing tobacco-related health disparities.
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Affiliation(s)
- Bukola Usidame
- Department of Epidemiology, University of Michigan, School of Public Health, Ann Arbor, MI, USA
| | - Jana Hirschtick
- Department of Epidemiology, University of Michigan, School of Public Health, Ann Arbor, MI, USA
| | - Luis Zavala-Arciniega
- Department of Epidemiology, University of Michigan, School of Public Health, Ann Arbor, MI, USA
| | - Delvon T Mattingly
- Department of Epidemiology, University of Michigan, School of Public Health, Ann Arbor, MI, USA
| | - Akash Patel
- Department of Epidemiology, University of Michigan, School of Public Health, Ann Arbor, MI, USA
| | - Rafael Meza
- Department of Epidemiology, University of Michigan, School of Public Health, Ann Arbor, MI, USA
| | - David T Levy
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
| | - Nancy L Fleischer
- Department of Epidemiology, University of Michigan, School of Public Health, Ann Arbor, MI, USA
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