The questionnaires used for this study were handed out, in sealed envelopes, to the Referent of the health education activities in each school with instructions to distribute one to each family. Families received an information sheet which explained the purpose of the project and requested that the survey be completed by one parent only, a self-administered anonymous questionnaire, and an envelope to facilitate the return of the completed questionnaire. In addition, the letter assured parents about the anonymity and confidentiality of all responses. Participants were asked to return the completed questionnaires to the school personnel anonymously via the envelope enclosed with each questionnaire. Participation was on a voluntary basis and all participants had the right to comply with or refuse participation. The response to questionnaire constituted the participants' informed consent. The study was approved by the Institutional Ethics Review Board.