"In the intention-to-treat (ITT) population, cure was achieved by 55.3% of patients with Vit. C (n=141) and by 25.7% of patients with placebo (n=136). The between-group difference was 29.6% (P<0.001)."
See summary at http://onlinelibrary.wiley.com/doi/10.1 ... _15.x/full