{"@type": "dcat:Dataset", "accessLevel": "public", "bureauCode": ["009:30"], "contactPoint": {"@type": "vcard:Contact", "fn": "SAMHSA", "hasEmail": "mailto:SAMHSAInfo@samhsa.hhs.gov"}, "description": "This report summarizes the 2018 NSDUH methods and other supporting information relevant to estimates of substance use and mental health issues, and organized into five chapters. Chapter 1 is an introduction to the report. Chapter 2 describes the survey, including information about the sample design; data collection procedures; and key aspects of data processing, such as development of analysis weights. Chapter 3 presents technical details on the statistical methods and measurement, such as suppression criteria for unreliable estimates, statistical testing procedures, and issues for selected substance use and mental health measures. Chapter 4 covers special topics related to prescription psychotherapeutic drugs. Chapter 5 describes other sources of data on substance use and mental health issues, including data sources for populations outside the NSDUH target population. Appendix A is a glossary that covers key definitions for use as a resource with the 2018 NSDUH reports and detailed tables. Appendix B provides a list of contributors to the report.", "distribution": [{"@type": "dcat:Distribution", "description": "Visit the original government dataset for complete information, documentation, and data access.", "downloadURL": "https://www.samhsa.gov/data/report/2018-methodological-summary-and-definitions", "mediaType": "text/html", "title": "Official Government Data Source"}], "identifier": "https://healthdata.gov/api/views/aicg-pu2h", "issued": "2025-07-14", "keyword": ["data-definitions", "mental-health", "samhsa", "substance-use", "survey-methodology"], "landingPage": "https://healthdata.gov/d/aicg-pu2h", "modified": "2025-09-06", "programCode": ["009:061"], "publisher": {"@type": "org:Organization", "name": "Substance Abuse and Mental Health Services Administration"}, "theme": ["SAMHSA"], "title": "2018 Methodological Summary and Definitions"}