| Items | Spring (%) | Summer (%) | Total (%) |
|---|---|---|---|
| Number of initial survey participants | 203 (100.00) | 203 (100.00) | 406 (100.00) |
| Number of participants who uploaded their tracking records by themselves | 135 (66.50) | 103 (50.74) | 238 (58.62) |
| Number of final participants after data validation on their tracking records (Valid samples) | 82 (40.39) | 76 (37.44) | 158 (38.92) |