2018 Delaware State Epidemiological Profile National Survey of Drug Use and Health Selected drug use, perceptions of great risk, average annual rates of first use of marijuana in Delaware, by age group (in percentages) Table copied as image (cannot be altered) Notes: a Estimates are based on a survey-weighted hierarchical Bayes estimation approach. b Average annual rate = 100*{[X1 ÷ (0.5 * X1 + X2) ]÷2 }, where X1 is the number of marijuana initiates in past 24 months and X2 is the number of persons who never used marijuana. Both of the computation components, X1 and X2, are based on a survey-weighted hierarchical Bayes estimation approach. Note that the age group is based on a respondent's age at the time of the interview, not his or her age at first use. Source: “2015-2016 National Survey on Drug Use and Health.” Center for Behavioral Health Statistics and Quality, Substance Abuse and Mental Health Services Administration 2018 Delaware State Epidemiological Profile

Source: 2018 Delaware State Epidemiological Profile Notes: a Estimates are based on a survey-weighted hierarchical Bayes estimation approach. b Average annual rate = 100*{[X1 ÷ (0.5 * X1 + X2)]÷2 }, where X1 is the number of marijuana initiates in past 24 months and X2 is the number of persons who never used marijuana. Both of the computation components, X1 and X2, are based on a survey-weighted hierarchical Bayes estimation approach. Note that the age group is based on a respondent's age at the time of the interview, not his or her age at first use. Source: “2015-2016 National Survey on Drug Use and Health: Model Based Prevalence Estimates.” Center for Behavioral Health Statistics and Quality, Substance Abuse and Mental Health Services Administration. Source: 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Delaware School Survey Marijuana use among Delaware 5th graders (in percentages) Table copied as image (cannot be altered) Source: “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Delaware School Survey Marijuana use among Delaware 5th graders (in percentages) Table copied as image (cannot be altered) Source: “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Delaware School Survey Marijuana use among Delaware 8th graders (in percentages) Table copied as image (cannot be altered) Source: “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Delaware School Survey Marijuana use among Delaware 8th graders (in percentages) Table copied as image (cannot be altered) Source: “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Delaware School Survey Marijuana use among Delaware 11th graders (in percentages) Table copied as image (cannot be altered) Source: “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Delaware School Survey Marijuana use among Delaware 11th graders (in percentages) Table copied as image (cannot be altered) Source: “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Youth Risk Behavior Survey Percentage of high school students who have ever used marijuana one or more times during their lifetime Table copied as image (cannot be altered) Source:“2017 Delaware Youth Risk Behavior Survey (YRBS).” Centers for Disease Control and Prevention (Administered by the Center for Drug and Health Studies, University of Delaware). 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Youth Risk Behavior Survey Percentage of high school students who used marijuana one or more times during the past 30 days Table copied as image (cannot be altered) Source:“2017 Delaware Youth Risk Behavior Survey (YRBS).” Centers for Disease Control and Prevention (Administered by the Center for Drug and Health Studies, University of Delaware). 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Youth Risk Behavior Survey Percentage of high school students who used synthetic marijuana one or more times during their lifetime Table copied as image (cannot be altered) Source:“2017 Delaware Youth Risk Behavior Survey (YRBS).” Centers for Disease Control and Prevention (Administered by the Center for Drug and Health Studies, University of Delaware). 2018 Delaware State Epidemiological Profile

2017 Delaware School Survey Average age of onset for marijuana use Table copied as image (cannot be altered) Source: “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile Delaware School Survey Trends in Delaware students’ past month marijuana use by grade, 1989-present Table copied as image (cannot be altered) Sources: Data Base/DiagnosticsPlus (1989-1993) Department of Public Instruction (1994) “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. (1995- Present) Note: These statistics contribute to the National Outcome Measures (NOMs) 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile Youth Risk Behavior Survey Trends in Delaware High School students’ marijuana use, 1999-present Table copied as image (cannot be altered) Note: Weighted Data Source: “Delaware Youth Risk Behavior Survey (YRBS).” Centers for Disease Control and Prevention (Administered by the Center for Drug and Health Studies, University of Delaware). 1999-2017 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile High School Youth Risk Behavior Survey Past month use of marijuana (in percentages) Table copied as image (cannot be altered) Notes: Weighted Data “--” National YRBS data for 2017 not yet available Source: “Delaware Youth Risk Behavior Survey (YRBS).” Centers for Disease Control and Prevention (Administered by the Center for Drug and Health Studies, University of Delaware). 1999-2017 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile High School Youth Risk Behavior Survey Past month use of marijuana (in percentages) Table copied as image (cannot be altered) Notes: Weighted Data “--” National YRBS data for 2017 not yet available Source: “Delaware Youth Risk Behavior Survey (YRBS).” Centers for Disease Control and Prevention (Administered by the Center for Drug and Health Studies, University of Delaware). 1999-2017 “Trends in the Prevalence of Marijuana, Cocaine, and Other Illegal Drug Use National YRBS: 1991-2015” Centers for Disease Control and Prevention. “National Youth Risk Behavior Survey” Centers for Disease Control and Prevention. 2017. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile National Survey of Drug Use and Health Marijuana use in past year, by age group and state: 2014-2015 and 2015-2016 (in percentages) Notes: a Estimates are based on a survey-weighted hierarchical Bayes estimation approach. b p value: Bayes significance levels for the null hypothesis of no change between the 2014-2015 and 2015-2016 population percentages. Table copied as image (cannot be altered) Source: “National Survey on Drug Use and Health: Comparison of 2014-2015 and 2015-2016 Population Percentages.” Center for Behavioral Health Statistics and Quality, Substance Abuse and Mental Health Services Administration 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile National Survey of Drug Use and Health Marijuana use in past month, by age group and state: 2014-2015 and 2015-2016 (in percentages) Notes: a Estimates are based on a survey-weighted hierarchical Bayes estimation approach. b p value: Bayes significance levels for the null hypothesis of no change between the 2014-2015 and 2015-2016 population percentages. Table copied as image (cannot be altered) Source: “National Survey on Drug Use and Health: Comparison of 2014-2015 and 2015-2016 Population Percentages.” Center for Behavioral Health Statistics and Quality, Substance Abuse and Mental Health Services Administration 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile National Survey of Drug Use and Health Average annual rate of first use of marijuana, by age group and state: 2014-2015 and 2015-2016 NSDUH (in percentages) Notes: a Estimates are based on a survey-weighted hierarchical Bayes estimation approach. b p value: Bayes significance levels for the null hypothesis of no change between the 2014-2015 and 2015-2016 population percentages. Table copied as image (cannot be altered) Source: “National Survey on Drug Use and Health: Comparison of 2014-2015 and 2015-2016 Population Percentages.” Center for Behavioral Health Statistics and Quality, Substance Abuse and Mental Health Services Administration 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile Delaware School Survey, Youth Risk Behavior Survey and Monitoring the Future Comparison of recent National and Delaware estimates of marijuana use among High School Students (in percentages) Table copied as image (cannot be altered) Notes: “--“ Not Available. Weighted data. Sources: “Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. (2014- 2016) “Delaware Youth Risk Behavior Survey (YRBS).” Centers for Disease Control and Prevention (Administered by the Center for Drug and Health Studies, University of Delaware). (2014-2016) National Adolescent Drug Trends Press Release: Text and Tables. Monitoring the Future Study (MTF), University of Michigan. (2017) 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile Youth Risk Behavior Survey Percentage of high school students who think people moderately or greatly risk harming themselves physically or in other ways when they smoke marijuana once or twice a week Table copied as image (cannot be altered) Note: Weighted Data Source: “2017 Delaware Youth Risk Behavior Survey (YRBS).” Centers for Disease Control and Prevention (Administered by the Center for Drug and Health Studies, University of Delaware). 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Delaware School Survey Perceived “a lot of risk” in using marijuana weekly among 5th graders Table copied as image (cannot be altered) Source: “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Delaware School Survey Perceived “great risk” in using marijuana regularly among 8th and 11th graders Table copied as image (cannot be altered) Source: “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile National Survey of Drug Use and Health Perceptions of great risk of smoking marijuana once a month, by age group and state: 2014-2015 and 2015-2016 NSDUH (in percentages) Table copied as image (cannot be altered) Notes: a Estimates are based on a survey-weighted hierarchical Bayes estimation approach. b p value: Bayes significance levels for the null hypothesis of no change between the 2014-2015 and 2015-2016 population percentages. “--” Data not available Source: “2015-2016 National Survey on Drug Use and Health: Model-Based Prevalence Estimates.” Center for Behavioral Health Statistics and Quality, Substance Abuse and Mental Health Services Administration. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Delaware School Survey Reported smoking marijuana and driving among Delaware 11th graders (in percentages) Table copied as image (cannot be altered) Source: “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Delaware School Survey Reported smoking marijuana and driving among Delaware 11th graders (in percentages) Table copied as image (cannot be altered) Source: “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware. 2018 Delaware State Epidemiological Profile

2018 Delaware State Epidemiological Profile 2017 Delaware School Survey Trends in Delaware eleventh graders' reporting smoking marijuana and driving in the past month, 1990-2017 Table copied as image (cannot be altered) Source: “2017 Delaware School Survey.” Center for Drug and Health Studies, University of Delaware (1990-2017). 2018 Delaware State Epidemiological Profile