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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 — SU‑08 Data Methodology and Measurement

On this page:  About the National Data  |  Methodology

About the National Data

Data

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

Baseline: 3.4 percent of adults aged 18 years and over reported use of marijuana daily or almost daily in 2018

Target: 3.4 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.
Target-setting method
Maintain the baseline
Target-setting method justification
This method was used because the trend was moving away from the desired direction. Maintaining the baseline is the desired target because the Healthy People 2030 Workgroup Subject Matter Experts viewed maintaining the baseline 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 2018 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.