Zinc effects on common cold duration illustrate problems of routine statistical analyses

(University of Helsinki) Two randomized trials that examined the effects of zinc lozenges for the duration of common cold symptoms found that colds were shortened on average by 4.0 days and by 1.77 days. However, the shortest colds in the placebo groups of both studies lasted for only two days.
Source: EurekAlert! - Medicine and Health - Category: International Medicine & Public Health Source Type: news