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Characteristics of interviewees (n = 13)
| n | mean (SD) app usage in minutes | |
|---|---|---|
| Gender | ||
| Girl | 7 | 68 (32) |
| Boy | 6 | 45 (31) |
| Education type | ||
| General & technical track | 9 | 62 (31) |
| Vocational track | 4 | 47 (39) |
| Grade | ||
| 1st year of secondary | 6 | 53 (38) |
| 2nd year secondary | 3 | 40 (25) |
| 3rd year of secondary | 4 | 77 (23) |
| Family Affluence | ||
| Low | 2 | 29 (8) |
| Middle | 7 | 63 (36) |
| High | 4 | 62 (31) |
