Table 2.
Difficulties associated with participant recruitment and their correction measures.
| Study activity and associated difficulties or risks | Measures to correct or mitigate | |
| Patient recruitment |  | |
|  | Low number of patients recruited or low involvement by health care professionals | Send weekly reminders | 
| Adult Mental Health Care Center professionals have little familiarity with the questionnaire | Attach the questionnaire in reminder emails for health care professionals | |
| Delay in the schedule due to slow recruitment | Expand to the maximum period of recruitment | |
| Control participant recruitment |  | |
|  | Low access to paired patient controls | Create database of potential candidates who wanted to participate as controls | 
| Dependence on the pace of patient recruitment | Provide informative brochures | |