Purpose of the Questionnaire

The aim is to assess the knowledge and understanding related to the inborn metabolic disorder phenylketonuria (PKU).

Questionnaire Analysis

This questionnaire was developed by Loumakis in 1989 and consists of 23 questions concerning knowledge of the inborn metabolic disorder phenylketonuria.

Scoring and Statistical Analysis

Out of the 23 questions:
10 are answered as true or false
13 are multiple choice with 4 possible answers
It was designed following Oppenheim’s method (1973) and has been adapted into Greek.
Scoring is based on the total number of correct answers, and respondents are categorized into low, moderate, or sufficient knowledge levels depending on their score.

Validity and Reliability

The internal consistency reliability coefficient (Cronbach’s α) demonstrated satisfactory reliability at 0.78.

References

Greek Literature:
Loumakou, M. (1989). Attitudes of parents of children with phenylketonuria and their contribution to therapeutic outcomes (Doctoral dissertation, National and Kapodistrian University of Athens, Faculty of Education, Department of Primary Education).
International Literature:
Wang, X., Firdous, A., Xu, L., Chen, P., Liao, F., Lin, J., & Sun, J. (2019). A New Layered Silicogermanate PKU-23 and Its Transformation to a Zeolite with Three-Dimensional Channels. Crystal Growth & Design, 19(4), 2272–2278.