Figure 1.

Self-assessment of knowledge and call for improved education. The y-axis shows the respondents in percentage. The x-axis gives the respondents' (1) self-rated knowledge on hygiene guidelines and (2) call for introducing mandatory quality standards in hygiene education, such as an operation theater license. In interpreting graph (1), knowledge assessed as “excellent” or “good” was classified as positive answer, whereas knowledge assessed as “satisfactory,” “sufficient,” and “insufficient” was classified as negative answer. Graph (2) shows the respondents favoring an operation theater license as positive answer versus those adverse to such a license.