Table 3.
Characterization of breathalyser tests. Values are medians (interquartile range). BAC breath alcohol content
| Complete abstinence group (N = 13) | Intermittent abstinence group (N = 11) | |
|---|---|---|
| Number of days with at least one missed breathalyser assessment | 6 (2–17) | 9 (5–12) |
| First assessment (8 am–10 am) | ||
| % of scheduled breathalyser tests with positive BAC | 0 (0–0) | 0 (0–19) |
| % of scheduled breathalyser tests with zero BAC | 96 (85–100) | 93 (78–96) |
| % of scheduled breathalyser tests not completed (BAC missing) | 4 (0–13) | 4 (4–11) |
| Second assessment (12 pm–2 pm) | ||
| % of scheduled breathalyser tests with positive BAC | 0 (0–4) | 0 (0–4) |
| % of scheduled breathalyser tests with zero BAC | 93 (70–96) | 78 (74–85) |
| % of scheduled breathalyser tests not completed (BAC missing) | 7 (0–30) | 15 (11–26) |
| Third assessment (5 pm–7 pm) | ||
| % of scheduled breathalyser tests with positive BAC | 0 (0–4) | 11 (7–14) |
| % of scheduled breathalyser tests with zero BAC | 86 (75–96) | 82 (68–89) |
| % of scheduled breathalyser tests not completed (BAC missing) | 14 (4–18) | 11 (4–18) |
| Fourth assessment (10 pm–12 am) | ||
| % of scheduled breathalyser tests with positive BAC | 7 (0–14) | 25 (21–32) |
| % of scheduled breathalyser tests with zero BAC | 75 (55–95) | 57 (54–75) |
| % of scheduled breathalyser tests not completed (BAC missing) | 14 (4–27) | 11 (7–14) |