Universitätsklinik Köln(AöR) Gesundheits- Kranken-und Kinderkrankenpflegeschule Bitburger Straße 1 Köln 50935 Germany;
Faculty of Public Health Research Center of Public Health University of Vlore“Ismail Qemali” Vlore 9400 Albania;
type 2 diabetes; health education; management; randomized controlled trial; HbA1c; BMI;