Volume 21, Number 11—November 2015
Research
Association of Higher MERS-CoV Virus Load with Severe Disease and Death, Saudi Arabia, 2014
Figure 2

Figure 2. Box plot of Ct values for 102 patients infected with MERS-CoV by severity status. Kingdom of Saudi Arabia, 2014. A) Patients who were alive (n = 61) versus dead (n = 41) at the time of follow-up chart review or phone contact. Wilcoxon rank-sum test, p = 0.0087. B) Patients who had a severe outcome (death or ICU admission, n = 48) versus nonsevere outcome (n = 54). Wilcoxon rank-sum test, p = 0.0036. C) Patients who were admitted to the ICU (n = 36) versus the regular ward (n = 31). Wilcoxon rank-sum test, p = 0.014. D) Among patients who survived, symptomatic (n = 30) versus mildly symptomatic/asymptomatic (n = 31). Wilcoxon rank-sum test, p = 0.08. Box and whiskers plot features are as follows: central line in box is median, bottom line of box is first quartile (25%), top line of box is third quartile (75%), diamond is mean, bottom of whiskers is first quarter minus 1.5 × interquartile range, top of whiskers is third quarter plus 1.5 × interquartile range, and dots are outliers. Ct , cycle threshold; ICU, intensive care unit; MERS-CoV, Middle East respiratory syndrome coronavirus.