Table 2.
Descriptive statistics of eligible participants.
| Characteristics | Total (N=123) | Control (N=61) | Intervention (N=62) | |
| Age (years), mean (95% CI) | 47.6 (45.8-49.3) | 47.4 (44.9-50.0) | 47.7 (45.3-50.1) | |
| Gender, n (%) | ||||
|
|
Male | 117 (95.1) | 58 (95.1) | 59 (95.2) |
|
|
Female | 6 (4.9) | 3 (4.9) | 3 (4.8) |
| Marital status, n (%) | ||||
|
|
Married/in a relationship | 95 (77.2) | 48 (78.7) | 47 (75.8) |
|
|
Single/separated | 19 (15.5) | 8 (13.1) | 11 (17.7) |
|
|
Divorced/widowed | 9 (7.3) | 5 (8.2) | 4 (6.5) |
| Military branch, n (%) | ||||
|
|
Royal Navy/Royal Marines | 14 (11.4) | 6 (9.8) | 8 (12.9) |
|
|
Army | 87 (70.7) | 44 (73.2) | 43 (69.6) |
|
|
Royal Air Force | 16 (13.1) | 8 (13.1) | 8 (13.1) |
|
|
Othera | 6 (4.9) | 3 (4.9) | 3 (4.9) |
| Length of military service in years, mean (95% CI) | 14.4 (12.9-15.9) | 15 (12.9-17.1) | 13.8 (11.5-16.1) | |
| Probable PTSDb, n (%) | 57 (46.3) | 26 (42.6) | 31 (50.0) | |
| Probable depression, n (%) | 65 (52.9) | 30 (49.2) | 35 (56.5) | |
| Probable anxiety, n (%) | 61 (49.6) | 32 (52.5) | 29 (46.8) | |
| AUDITc score, median (IQR) | 16 (10-22) | 14 (8-23) | 16 (12-21) | |
| Baseline unit weekly alcohol consumptiond, median (IQR) | 44 (25-70) | 43 (25-62) | 47 (26-73) | |
| Device type, n (%) | ||||
|
|
iOS | 56 (45.5) | 32 (52.5) | 24 (38.7) |
|
|
Android | 67 (54.5) | 29 (47.5) | 38 (61.3) |
| Withdrawn by day 84, n (%) | 19 (15.5) | 13 (21.3) | 6 (9.7) | |
| Completed primary outcome assessment, n (%) | ||||
|
|
Day 28 | 78 (63.4) | 37 (60.7) | 41 (66.1) |
|
|
Day 84 | 79 (64.3) | 38 (62.3) | 41 (66.1) |
|
|
Day 168 | 27 (22.0) | 14 (23.0) | 13 (21.0) |
| Completed secondary outcome assessment, n (%) | ||||
|
|
Day 28 | 73 (59.4) | 34 (55.7) | 39 (62.9) |
|
|
Day 84 | 76 (61.8) | 37 (60.7) | 39 (62.9) |
|
|
Day 168 | 27 (22.0) | 14 (23.0) | 13 (21.0) |
aService branch not reported in medical records.
bPTSD: posttraumatic stress disorder.
cAUDIT: Alcohol Use Disorder Identification Test (10 items).
dRecorded using the Timeline Follow Back for Alcohol Consumption (TLFB).