Table 3.
Day-level alcohol use characteristics by measurement sourcea
| Study days 1 – 14 | Skyn | SCRAM | Self-report |
|---|---|---|---|
| Type of day | |||
| Drinking day [n (%)] | 38 (36.2%) | 40 (24.2%) | 56 (53.3%) |
| Non-drinking day [n (%)] | 57 (54.3%) | 65 (39.4%) | 47 (44.8%) |
| Missing [n (%)] | 10 (9.5%) | 60 (36.4%) | 2 (2.4%) |
| Drinking intensity | |||
| Number of drinks (c) (Mean ± SD)b | – | – | 1.45 ± 1.05 |
| Peak TAC (Mean ± SD)c,d | 53.66 ± 39.58 | 0.018 ± 0.012 | – |
| Area under the curve (Mean ± SD)e,f | 82.64 ± 76.02 | 0.08 ± 0.06 | – |
| Drinking Duration (hours/day) | |||
| Morning EMA (tmorn) (Mean ± SD)g | – | – | 1.59 ± 1.37 |
| Event contingent EMA (tevent) (Mean ± SD)h | – | – | 2.14 ± 1.78 |
| Time with TAC > 0 (Mean ± SD)i,j | 1.40 ± 1.20 | 2.75 ± 1.43 | – |
| Estimated BAC (g/dL) k | |||
| Morning EMA (eBACmorn) (Mean ± SD)g | 0.007 ± 0.005 | ||
| Event Contingent EMA (eBACevent) (Mean ± SD)h | 0.005 ± 0.006 | ||
| Average Ascending TAC Slope (Mean ± SD)k,l | 129.29 ± 118.70 | 0.005 ± 0.002 | – |
| Average Descending TAC Slope (Mean ± SD)m,n | −72.14 ± 44.50 | −0.006 ± 0.003 | – |
| Study days 1–28 | Skyn | SCRAM | Self-report |
| Type of day | |||
| Drinking day [n (%)] | 107 (32.5%) | 40 (12.2%) | 169 (51.4%) |
| Non-drinking day [n (%)] | 185 (56.2%) | 65 (19.8%) | 142 (43.2%) |
| Missing [n (%)] | 37 (11.2%) | 224 (68.1%) | 18 (5.5%) |
| Drinking intensity | |||
| Number of drinks (Mean ± SD)b | – | – | 1.41 ± 1.02 |
| Peak tAC (Mean ± SD)c,d | 42.85 ± 25.07 | 0.018 ± 0.012 | – |
| Area under the curve (Mean ± SD)e,f | 64.56 ± 53.47 | 0.08 ± 0.06 | – |
| Drinking duration (hours/day) | |||
| Morning EMA (Mean ± SD)g | – | – | 1.88 ± 1.27 |
| Event contingent EMA (Mean ± SD)h | – | – | 1.95 ± 1.51 |
| Time with TAC > 0 (Mean ± SD)i,j | 1.08 ± 0.83 | 2.75 ± 1.43 | – |
| Estimated BAC (g/dL) | |||
| Morning EMA (eBACmorn) (Mean ± SD)g | – | – | 0.014 ± 0.007 |
| Event contingent EMA (eBACevent) (Mean ± SD)h | – | – | 0.012 ± 0.008 |
Notes: SCRAM = Secure Continuous Remote Alcohol Monitor; TAC = Transdermal alcohol concentration; EMA = Ecological momentary assessment; SD = standard deviation
Values are reported based on all days and are not limited to drinking days.
3.6% of days 1–14 were missing data. 7.3% of days 1–28 were missing data.
Peak TAC for the Skyn is in μg/L air. 7.9% of days 1–14 were missing data. 11.2% of days 1–28 were missing data.
Peak TAC for the SCRAM is in g/dL. 36.4% of days 1–14 were missing data across all 11 participants. 0% of days 1–14 were missing data for the 7 participants with functional SCRAM devices.
7.9% of days 1–14 were missing data. 11.2% of days 1–28 were missing data.
36.4% of days 1–14 were missing data across all 11 participants. 0% of days 1–14 were missing data for the 7 participants with functional SCRAM devices.
3.6% of days 1–14 were missing data. 7.3% of days 1–28 were missing data.
14.5% of days 1–14 were missing data. 18.8% of days 1–28 were missing data.
7.9% of days 1–14 were missing data. 11.2% of days 1–28 were missing data.
36.4% of days 1–14 were missing data across all 11 participants. 0% of days 1–14 were missing data for the 7 participants with functional SCRAM devices.
7.9% of days 1–14 were missing data.
38.2% of days 1–14 were missing data across all 11 participants. 1.8% of days 1–14 were missing data for the 7 participants with functional SCRAM devices.
7.9% of days 1–14 were missing data.
36.7% of days 1–14 were missing data across all 11 participants. 0% of days 1–14 were missing data for the 7 participants with functional SCRAM devices.