... Knowledge 1, 2, 4, 6,8,10,11,12,15,17,19,21,26,27,32,33,34,35,36 Skills 3,5,6,7,8,9,11,13,15,17,20,24,25,28,29,30 Attitudes 3,5,7,9,12,14,16,18,22,23,24,28,29,31,32 Table 10 lists the data type and source and the intervention results for each study. The data type in 19 studies (52.8%) was quantitative, in 8 studies (22.2%) qualitative and in the remaining 9 studies (25%) quantitative and qualitative, as shown in Figure 8. ...