Why are state-level estimates on treatment outcomes based on only 2022 data in the 2021-2022 release?

In 2022, major revisions were made to the drug treatment and mental health service use sections of the survey. These changes better reflect the current state of treatment services and their delivery. The new measures are not comparable to the measures used in 2021. Therefore, these estimates were based on 2022 data alone. Consequently, the confidence intervals around the estimates are generally wider than for state estimates based on two years of data.