| Reason | Number of students |
| Time management | 964 (38.3%) |
| Overload at study | 667 (26.5%) |
| The particular subject had learned | 310 (12.3%) |
| No face-to-face interaction | 143 (5.7%) |
| Lack of self-study skills | 87 (3.5%) |
| Others | 347 (13.8%) |