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| Phone use (hours/week) | Group A (MVC) | Group B (non-MVC) |
|---|---|---|
| 0 – 1 | 15 (26.3%) | 32 (26.7%) |
| 1 – 2 | 11 (19.3%) | 24 (20.0%) |
| 2 – 3 | 10 (17.5%) | 16 (13.3%) |
| 3 – 4 | 6 (10.5%) | 13 (10.8%) |
| >4 | 15 (26.3%) | 35 (29.2%) |
| Total | 57 | 120 |
