A comprehensive training program should encompass several components: - Understanding the Study Protocol: Data collectors must be well-versed with the study's objectives, the importance of each data point, and ethical considerations. - Using Data Collection Tools: This includes training on the use of electronic data capture systems, standardized questionnaires, or any other tools specific to the study. - Interview Techniques: Effective training in conducting interviews ensures that data collectors can obtain accurate and complete information from participants. - Handling Data: Training should cover data storage, confidentiality, and data security measures.