I believe Knight posted links to fulltext at http://lesswrong.com/lw/h56/the_universal_medical_journal_article_error/8pne

Certainly if you take the data alone without priors, I'd conclude that more likely than not, food dyes have an effect. That's how I would interpret the 84% significance threshold - probably there is a difference. Do you agree?

I haven't looked but I suspect I would not agree and that you may be making the classic significance misinterpretation.