You may be interested in collecting data on educational background from respondents. For example, it is commonly believed that educational background can be associated with a) how knowledgeable respondents are about the treatment they have received or b) underlying attitudes to treatment interventions.
Nevertheless, different contexts lend themselves to different degrees of precision and types of categories relating to the respondents’ educational experience. You may therefore find yourself in a dilemma in identifying the best response categories to frame your question. The Survey Question Bank already carries a plethora of resources on educational surveys. Tip: to start the ball rolling, you may find it useful to use the Find Questions link at the above site and input the search term educational qualifications.
To help you gain an overview of ideas, you may also wish to refer to the article: Measuring Educational Attainment.
Categorizing Educational Background by Margaret MacDougall is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.