Limitations and strengths
The limitations of the study include impossibility of assessing the long-term effect of the intervention, individual’s responses to the questions. Another limitation of the study was self-report in response to behavioral questions (instead of objective observation), also since the questionnaire has been validated internally thus, the generalizability of the result is limited.This study benefited from some strength including face-to-face education, use peers for education and having a control group and equal chance of being selected in the interventional or control groups in a cluster-randomized trial.