| SF-12® PCS | SF-12® MCS | |||
| Control | Mobile telephone | Control | Mobile telephone | |
| Subjects | 46 | 43 | 46 | 43 |
| Baseline | 43.2±1.4 | 41.6±1.5 | 48.6±1.2 | 48.6±1.1 |
| 1 month | 42.7±1.4 | 42.6±1.6 | 48.2±1.2 | 50.1±1.0 |
| 2 months | 41.7±1.5 | 45.2±1.3* | 48.0±1.1 | 50.0±1.3 |
| 3 months | 41.3±1.4 | 47.5±1.2*,** | 47.7±1.4 | 50.7±1.1 |
| 4 months | 38.9±1.4* | 45.6±1.3*,** | 43.6±1.4*,** | 50.9±1.0 |
| 5 months | 38.6±1.5* | 46.4±1.2*,** | 43.6±1.5*,** | 49.3±1.1 |
| 6 months | 40.0±1.5 | 45.5±1.4*,** | 44.4±1.4*,** | 50.4±1.1 |
Data are presented as n or mean±sem. SF: Short Form; PCS: physical component score; MCS: mental component score. *: p<0.05 compared with baseline; **: p<0.01 for control group versus mobile telephone group.