Rate ratio (RR) of gastrointestinal adverse events according to maximum severity and type by days and treatment group in a randomized double-blind clinical trial of T. suis and placebo, Denmark, 2008.

*Include events occurring in less than 5% of subjects on T. suis (n = x), and placebo (n = y): Nausea (x = 3, y = 1), stomach discomfort, (x = 3, y = 2), constipation (x = 1), haemoroids (x = 1), lip dry (y = 1), tooth ache (x = 1, y = 2), oesophagal discomfort (y = 1), oesophagal pain (x = 3, y = 2), vomiting (y = 1), dysphagia (x = 1), gastroenteritis viral (x = 1).**Among those who believed they received T. suis eggs (vs. the remaining subjects), the corresponding percentage was 83% (vs. 71%) in the T. suis group and 53% (vs. 47%) in the placebo group. If the allocation was disregarded, the percentage was 70% among those who believed they received T. suis eggs and 59% among the remaining subjects.