I just completed the questionnaire and wanted to point out that it might be helpful to consider that whilst someone may not have a current diagnosis, they may have historically suffered from and been previously diagnosed with a form of anxiety. As I have myself, but there was no option to indicate this.
It was a great survey though and I have a personal interest in anxiety and how it is professionally understood (because I have found it difficult to get any treatment that made a difference to me). So I hope it goes well and I bet the findings will make for interesting reading!