Table 1.
Participant characteristics at baseline and goal commitment.
| Factor 1: chat-based communication |
Factor 2: length |
All participants (n = 534) | |||
|---|---|---|---|---|---|
| No (n = 263) | Yes (n = 271) | 28 days (n = 266) | 50 days (n = 268) | ||
| Gender, n (%) | |||||
| Female | 85 (32.4%) | 98 (36.2%) | 91 (34.3%) | 92 (34.3%) | 183 (34.3%) |
| Male | 178 (67.6%) | 173 (63.8%) | 175 (65.7%) | 176 (65.7%) | 351 (65.7%) |
| Age, mean (SD) | 27.5 (7.3) | 27.6 (6.7) | 28.2 (7.1) | 26.8 (6.8) | 27.5 (7.0) |
| Educational level, n (%) | |||||
| Basic school (Hauptschule) | 25 (9.5%) | 29 (10.7%) | 30 (11.3%) | 24 (9.0%) | 54 (10.1%) |
| Middle school (Realschule) | 64 (24.4%) | 57 (21.0%) | 61 (23.0%) | 60 (22.4%) | 121 (22.7%) |
| High school (Gymnasium) | 165 (62.7%) | 181 (66.8%) | 167 (62.8%) | 179 (66.8%) | 346 (64.8%) |
| Other school | 9 (3.4%) | 4 (1.5%) | 8 (3.0%) | 5 (1.9%) | 13 (2.4%) |
| Housing situation, n (%) | |||||
| Alone | 70 (26.6%) | 56 (20.7%) | 66 (24.8%) | 60 (22.4%) | 126 (23.6%) |
| With parents | 41 (15.6%) | 59 (21.8%) | 45 (16.9%) | 55 (20.5%) | 100 (18.7%) |
| With partner | 85 (32.3%) | 90 (33.2%) | 88 (33.1%) | 87 (32.5%) | 175 (32.8%) |
| Shared flat | 38 (14.4%) | 39 (14.4%) | 40 (15.0%) | 37 (13.8%) | 77 (14.4%) |
| Other | 29 (11.0%) | 27 (10.0%) | 27 (10.2%) | 29 (10.8%) | 56 (10.5%) |
| Cannabis | |||||
| Use days, mean (SD)a | 24.7 (7.3) | 25.1 (6.5) | 24.9 (7.0) | 24.9 (6.8) | 24.9 (6.9) |
| Use occasions, mean (SD)a | 122.5 (111.6) | 120.1 (104.1) | 123.7 (108.9) | 118.9 (106.8) | 121.2 (107.7) |
| Amount (grams), mean (SD)a | 23.2 (18.8) | 21.3 (18.6) | 23.2 (19.6) | 21.3 (17.8) | 22.2 (18.7) |
| SDS, mean (SD) | 9.9 (2.8) | 10.0 (2.7) | 10.1 (2.5) | 9.8 (2.9) | 10.0 (2.7) |
| CCS-7, mean (SD) | 4.4 (1.3) | 4.2 (1.2) | 4.4 (1.3) | 4.2 (1.3) | 4.3 (1.3) |
| DTCQ-8, mean (SD) | 46.1 (18.8) | 47.6 (18.0) | 45.8 (17.6) | 47.8 (19.1) | 46.8 (18.4) |
| Preferred effect, n (%) | |||||
| Soft/mild | 100 (38.0%) | 107 (39.5%) | 109 (41.0%) | 98 (36.6%) | 207 (38.8%) |
| Strong/intense | 163 (62.0%) | 164 (60.5%) | 157 (59.0%) | 170 (63.4%) | 327 (61.2%) |
| Other substancesa | |||||
| Alcohol use days, mean (SD) | 4.8 (6.1) | 3.8 (4.8) | 4.5 (5.8) | 4.1 (5.2) | 4.3 (5.5) |
| Use of illegal substances, n (%) | 57 (21.7%) | 48 (17.7%) | 58 (21.8%) | 47 (17.5%) | 105 (19.7%) |
| Other measures | |||||
| Self reflection (SRIS) | 54.0 (6.3) | 54.5 (6.3) | 54.1 (6.6) | 54.4 (6.0) | 54.3 (6.3) |
| Goal commitment | |||||
| To reduce/pause, n (%) | 103 (39.2%) | 129 (47.6%) | 106 (39.8%) | 126 (47.0%) | 232 (43.4%) |
| To abstain, n (%) | 160 (60.8%) | 142 (52.4%) | 160 (60.2%) | 142 (53.0%) | 302 (56.6%) |
a
During the past 30 days.