Table 3.
Baseline demographics and health-related characteristics for each group
| Total (N = 279) |
Control group (n = 95) | Intervention groupa (n = 150) | Group diffb | |
|---|---|---|---|---|
| n (%) | n (%) | n (%) | P | |
| Gender | 0.14 | |||
| Girl | 153 (54.84%) | 59 (62.11%) | 76 (50.67%) | |
| Boy | 124 (44.44%) | 36 (37.90%) | 72 (48.00%) | |
| Other | 2 (0.72%) | 0 (0.00%) | 2 (1.33%) | |
| Education type | < 0.001 | |||
| General & tech. track | 182 (65.23%) | 43 (45.26%) | 113 (75.33%) | |
| Vocational track | 97 (34.77%) | 52 (54.74%) | 37 (24.67%) | |
| Grade | 0.15 | |||
| 1st year of secondary | 87 (31.18%) | 22 (23.16%) | 49 (32.67%) | |
| 2nd year of secondary | 92 (32.97%) | 32 (33.68%) | 53 (35.33%) | |
| 3rd year of secondary | 100 (35.84%) | 41 (43.16%) | 48 (32.00%) | |
| Family Affluence | 0.98 | |||
| Low | 80 (28.67%) | 28 (29.47%) | 45 (30.00%) | |
| Middle | 134 (48.03%) | 45 (47.37%) | 72 (48.00%) | |
| High | 65 (23.30%) | 22 (23.16%) | 33 (22.00%) | |
| mean (SD) | mean (SD) | mean (SD) | P | |
| Mental health | ||||
| HRQoL (t-score) | 54.11 (6.96) | 53.44 (6.40) | 54.54 (7.28) | 0.12 |
| Psychol. well-being (t-score) | 52.10 (8.00) | 52.06 (7.34) | 52.12 (8.42) | 0.70 |
| Moods (t-score) | 48.57 (9.77) | 48.32 (9.00) | 48.73 (10.28) | 0.50 |
| Self-Perception (t-score) | 52.06 (8.71) | 51.97 (8.32) | 52.11 (8.97) | 0.74 |
| Peer support (t-score) | 54.71 (5.97) | 54.18 (6.74) | 55.04 (5.42) | 0.50 |
| Resilience (range 1–5) | 3.18 (0.64) | 3.16 (0.65) | 3.20 (0.64) | 0.28 |
| Depressed feelings (t-score) | 53.58 (8.53) | 54.2 (7.84) | 53.4 (9.12) | 0.34 |
| Lifestyle behaviors | ||||
| LPAc (min/day) | 230 (105) | 252 (107) | 215 (99) | 0.001 |
| MVPAc (min/day) | 122 (49) | 117 (35) | 122 (52) | 0.89 |
| Sedentary timec (min/day) | 572 (127) | 587 (116) | 570 (132) | 0.55 |
| Sleep weekdaysd (min/night) | 476 (60) | 472 (53) | 480 (48) | 0.14 |
| Sleep weekende (min/night) | 552 (79) | 548 (75) | 552 (68) | 0.74 |
| Breakfast freq. (days/week) | 5.15 (2.26) | 4.87 (2.38) | 5.29 (2.19) | 0.30 |
| Sleep quality (range 1–5) | 2.87 (0.84) | 2.84 (0.83) | 2.89 (0.83) | 0.63 |
Abbreviations: LPA light intensity physical activity, MVPA moderate to vigorous intensity physical activity
a Selection of intervention group that used the #LIFEGOALS app (i.e., with in-app duration ≥ 2 min)
b Difference between control and intervention group: χ2-test for categorical variables, t-test or Wilcoxon rank test for continuous variables
c Total: n = 246, control: n = 86, intervention: n = 134
d Total: n = 221, control: n = 88, intervention: n = 112
e Total: n = 229, control: n = 80, intervention: n = 125