Measurement of self-efficacy and coping strategies in food- related problem situations: Adaptation
Zwaard,J. van der, Bijl, J.J. van der, Gamel, C.J.
AIM. The aim of this research project was the development and validation of a Dutch version of the Situational Obstacles to Dietary Adherence (SODA) Questionnaire for adults with type 2 diabetes not treated with insulin. METHOD. The existing American SODA questionnaire was translated into Dutch. The questionnaire measures the confidence patients have in their ability to cope with problematic dietary situations (selfefficacy) and also shows how people cope with these situations (coping strategies). Several modifications were made in the original questionnaire based on the content validation. Subsequently, 69 patients with type 2 diabetes completed the adapted questionnaire, and a reliability test and factor analysis were performed. RESULTS. Internal consistency was high, Cronbach's alpha .95. Factor analysis identified two factors explaining 56% of the variance. However, multidimensionality of the scale could not be shown. DISCUSSION AND CONCLUSION. Based on this study, the number of items was reduced and the structure of the questionnaire was simplified to enhance the usefulness. The Dutch questionnaire can be used as an aid when providing individualized guidance to patients with type 2 diabetes in order to promote adherence to their diet. Furthermore the questionnaire can be used to measure the effects of guidance.