Figure 3.
Forest plot of comparison of micronutrients versus placebo on cold duration. Four studies were excluded from the analysis as the mean number of days ill was not used as the measure for cold duration. These studies expressed the cold duration in terms of percentage of subjects symptomatic after 1 or 7 days,35 median number of days ill (without reporting the interquartile range),31,41 or survival curves.43 Grading of Recommendations Assessment, Development and Evaluation quality of evidence: all micronutrients, vitamin D, and zinc—low. This figure appears in color at www.ajtmh.org.