- The effectiveness of interventions is to improve knowledge, attitude and practice in 6 tasks of CBR volunteers: Reduce the rate of CBR volunteers having poor knowledge (28.8%), increase the percentage of CBR volunteers with averaged knowledge of 16.2% and good knowledge (12.7%); reduce CBR volunteers with low and middle attitudes of 8.6% and 16.8% respectively, increase the number of CBR volunteers with good attitude to 25.6%; decrease the rate of CBR volunteers having unstandardized practice to 36.7%, raise the percentage of Volunteers with standardized practice and good practice up to 30.0% and 6.7% respectively.