I think the answer is dependent on how close the electronic version is the paper. We developed a web-based FFQ which totally changed the flow and presentation of the paper version and it resulted it higher accuracy during our validation study. I know of a number of studies that used an online version of a paper FFQ that for all intents and purposes was exactly the same. They used both interchangeably in their studies.

Thanks, have you published the validation study?

Yes, our diet assessment validation study is published in JAND http://www.andjrnl.org/article/S2212-2672(13)01776-0/abstract. Let me know if you'd like to try our FFQ.