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Data on pre (-1-month), post (0-month) and retention 6-month assessment on confidence score for both groups. *P<0.05 is considered significantly different. **Total score for confidence level is 25: <5 is not confident; 6-10 slightly confident; 11-15 confident; 16-20 slightly more confident; and 21-25 very confident. SIV - self-instruction videos, TCI - traditional classroom intervention
