Table 2 Monitoring adherence and results (n = 17)

Breathalyzer readings

 Number of breathalyzer readings (out of 28)

22.29 (5.65)

 Days with at least one breathalyzer reading (out of 14)

12.47 (2.12)

 Number of daytime breathalyzer readings (out of 14)

12.06 (2.14)

 Number of evening breathalyzer readings (out of 14)

10.24 (3.85)

 Average BAC level

0.02 (0.03)

Mobile surveys

 Number of mobile surveys (out of 28)

17.41 (8.52)

 Days with at least one mobile survey (out of 14)

10.71 (4.21)

 Number of daytime mobile surveys (out of 14)

10.29 (4.21)

 Number of evening mobile surveys (out of 14)

7.12 (4.87)

 Average number of drinks reported/survey

2.62 (2.09)

Alcohol use

 Average percent of total breathalyzer readings indicating alcohol consumption^a

20%

 Average percent of daytime breathalyzer readings indicating alcohol consumption^a

19%

 Average percent of evening breathalyzer readings indicating alcohol consumption^a

22%

 Average percent of total surveys indicating alcohol consumption^a

25%

 Average percent of daytime surveys indicating alcohol consumption^a

20%

 Average percent of evening surveys indicating alcohol consumption^a

40%

 Average percent of days with at least one breathalyzer reading indicating alcohol consumption^a

23%

 Average percent of days with at least one survey indicating alcohol consumption^a

34%

 Average percent of time that breathalyzer and survey matched in terms of detecting alcohol consumption

90%