| Characteristics | The observation group | The control group | P value |
| (n = 28) | (n = 28) | ||
| Gender |
|
| 0.737 |
| Male | 6 | 5 |
|
| female | 22 | 23 |
|
| Age | 22.93 ± 0.81 | 23.14 ± 0.76 | 0.312 |
| Education |
|
| 0.778 |
| Bachelor college degree | 18 | 19 |
|
| Master degree | 10 | 9 |
|