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. 2021 Mar 3;78(6):1–8. doi: 10.1001/jamapsychiatry.2020.4768

Figure 2. Percentage of Negative Ethyl Glucuronide Urine Test Results Over the Observation and Intervention Periods.

Figure 2.

Alcohol abstinence over time represented by the percentage of negative EtG test results (EtG<150 ng/mL). The biweekly visits were combined as follows: (1) if the participant had a positive EtG test result at either of the visits, the combined result was recorded as positive; (2) if the participant had 1 positive EtG test result and 1 negative EtG test result, the combined result was recorded as positive; and (3) if both visits were missing, the combined result was recorded as missing. The combination of biweekly visits into weeks was for display purposes only. EtG indicates ethyl glucuronide.