I think what I wanna say is I am a bit unhappy about the classification and wouldn't know where to put my headaches; only it's not "tension headache".
If you look at the survey results, many of the respondents say that they experience 3 to 5 of these headache types. So I don't think these detailed results really tell us anything really.
I was hoping that people with CCI etc would only experience very specific types of headache, for example, only coat-hanger headaches or occipital headaches. In which case, the type of headache a person has provides a clue as to their CCI status.
That was the purpose of this headache question: to see if there was a relationship between the type of headache experienced, and whether someone is positive or negative for CCI or related conditions. But there does not seem to be any such relationship.
Therefore it might have been better and simpler just to ask: "Do you have headaches, and if so, are they mild, moderate or severe?".
Or where do I put migraines that involve both sides? I know it is said that migraines are typically on one side, but in my case they never were.