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| Variable | Category | Number of hours of watching TV | p |
| Mean (SD) | |||
| Sex | Female | 6.32(2.44) | 0.121 |
| Male | 7.03(2.65) | ||
| Grade | First grade | 5.70(2.06) | 0.037 |
| Fifth grade | 7.12(1.88) |
