I will throw in an idea. You have a preset list of yes/no questions. Make this a table of its own. You also have a master table of cases, I'm sure.
When you are reading about normalization, assure that you read about something called a JUNCTION TABLE. Because you can make one that links a single case to your list of questions. You would store a set of junction entries that show that case #1234, the client answered questions 10, 21, 45, 62, 93, and 99 with YES. Anything that was answered NO, you don't store. Then when you generate your report of answers, all you have to include is the list with affirmative answers. That is all that would be in the junction table.
You agreed to look up normalization. Once you do, add JUNCTION TABLES to the list of reading. They are a normalized way to store exactly what you suggested that you wanted to store, and take up minimum room to do so.