Box plot of stool cycle threshold (Ct) values of adenovirus. (A) Adenovirus-positive acute gastroenteritis cases (n = 516) (median, 22.8 [IQR, 14.6, 32.7]) versus adenovirus-positive controls (n = 97) (median, 32.3 [IQR, 29.5, 34.1]). Significance was tested by a Mann-Whitney U test (two-sided unadjusted P value of <0.001). (B) Adenovirus F40/41-positive acute gastroenteritis cases (n = 229) (median, 13.8 [IQR, 11.5, 17.3]) versus non-F40/41-positive cases (n = 153) (median, 25.8 [IQR, 20.9, 30.9]). Significance was tested by a Mann-Whitney U test (two-sided unadjusted P value of <0.001). (C) Adenovirus-positive acute gastroenteritis cases with monodetections (n = 250) (median, 17.4 [IQR, 13.0, 26.9]) versus adenovirus-positive cases with codetections (n = 266) (median, 30.4 [IQR, 20.3, 33.7]). Significance was tested by a Mann-Whitney U test (two-sided unadjusted P value of <0.001).