The Understanding America Study - Drug Use Supplement (UAS-DUS) is a longitudinal panel survey public data resource that tracks monthly variation in drug use patterns and related-characteristics in a nationally-representative sample of U.S. adults. Spurred by the COVID-19 pandemic and rapidly changing drug markets and social conditions, UAS-DUS addresses the need to detect changes in drug use that occur on a month-to-month basis and cannot be captured by standard annual surveys.

The USC Institute for Addiction Science commissioned the UAS-DUS resource, which integrates repeated measures data collection that began in March 2020 during the Understanding Coronavirus in America Study and has subsequently continued with ongoing tracking surveys. Surveys were first collected on a bi-weekly basis and subsequently monthly. Key measurements during each tracking survey include past-week use frequency/intensity for alcohol, cannabis, cigarettes, e-cigarettes, and other drugs, depression symptoms, and anxiety symptoms. Demographic measure variables are imbedded in the UAS-DUS data file alongside substance use and mental health measures. More than 100 additional psychological, social, economic, and health related measures that can be linked to the UAS-DUS data file were also administered to the UAS sample.

All existing UAS panel members and those who newly join the UAS panel are invited to participate in the UAS-DUS monthly tracking surveys (for more information about the UAS panel see here). As of May 2022, 37 total survey timepoints have been completed with approximately 10,000 participants. Additional monthly surveys are currently planned through June 2022. Pending the availability of funding, continued tracking for the UAS-DUS after June 2022 with an expanded set of measures is planned.

For additional questions about the UAS-DUS resource, feel free to contact the UAS at or Dr. Junhan Cho at