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U.S. Department of Health and Human Services Office of Disease Prevention and Health Promotion

Reduce the proportion of adults who use marijuana daily or almost daily in the past month — SU‑08 Data Methodology and Measurement

On this page:  About this objective  |  Methodology  |  History

About this objective

Data

Data Source:  National Survey on Drug Use and Health (NSDUH), SAMHSA

National baseline: 6.8 percent of adults aged 18 years and over reported use of marijuana daily or almost daily in the past 30 days in 2021

National target: 6.8 percent

Numerator
Number of adults aged 18 years and over reporting daily or almost daily use of marijuana in the past 30 days.
Denominator
Number of adults aged 18 years and over.
National target-setting method
Maintain the baseline
National target-setting method justification
Trend data are not available due to NSDUH redesign. Maintaining the baseline is the desired target because it retains the original target setting method, and the Workgroup Subject Matter Experts (SMEs) viewed this as an ambitious yet achievable target.

Methodology

Questions used to obtain the national baseline data

(For additional information, please visit the data source page linked above.)

From the 2021 National Survey on Drug Use and Health:

Numerator:
Have you ever, even once, used marijuana or hashish?
  1. Yes
  2. No
How long has it been since you last used marijuana or hashish]
  1. Within the past 30 days — that is, since [DATE]
  2. More than 30 days ago but within the past 12 months
  3. More than 12 months ago
What is your best estimate of the number of days you used marijuana or hashish during the past 30 days?
  1. 1 or 2 days
  2. 3 to 5 days
  3. 6 to 9 days
  4. 10 to 19 days
  5. 20 to 29 days
  6. All 30 days

Methodology notes

Daily or almost daily use in past month is defined as having used the substance on 20 or more days in the past month.

History

Revision History
Revised. 

In 2024, the baseline was revised from 3.4% in 2018 to 6.8% in 2021. While the target setting method remains maintain the baseline, the target was revised from 3.4% to 6.8%.
Trend issues
SAMHSA started multimode data collection (in-person and web-based collection) for the National Survey on Drug Use and Health (NSDUH) beginning in Quarter 4 (i.e., October to December) of 2020 due to COVID-19 pandemic. The 2021 NSDUH is based on both in-person and web interviews. Prior to 2020, NSDUH data are based on in-person data collection alone. The 2020 NSDUH included only 2 quarters (Quarters 1 and 4) of data collection unlike the four quarters of data collected in other years. Several analyses were conducted to investigate the impacts of these and related methodological issues on estimates for 2021. Using the outcomes of the comparability analyses, the following decisions were made regarding the 2021 NSDUH data. • Estimates from 2021 cannot be compared with those in 2019 or prior years because estimates from a multimode year are not comparable with estimates from a single-mode year. Estimates of change from 2019 or earlier to 2021 would probably be too greatly influenced by the mode effect. • Because of effects on estimates when some quarters of data are excluded or missing, 2020 estimates (based on two quarters of data) cannot be compared with those of any other year, including 2021. Using only 2 quarters of data may yield a different trend than use of 4 quarters of data. • NSDUH data from 2021 should not be combined or compared with any prior data.