Hot answers tagged standardization
Well, never = never, once a month = 1/30 per day, 1-2 per week = (say) 3/14 per day and so on. But 1) Fruits - 5 or more portions isn't a number. 2) Fruit juice frequency per week isn't in portions 3) A portion of juice isn't necessarily equal (in any real sense) to a portion of fruit. so, you can't really do this. I think you have to leave them as ...
Only top voted, non community-wiki answers of a minimum length are eligible