Table 2. Sensitivity of IgM anti-EV71 test at Different Times After Symptomatic Onset.

Days after onset	Tested No.	Positive No,	Rate (%) (95% CI)	Mean S/CO (SD)
1	20	18	90.0 (68.3–98.8)	4.66 (4.79)
2	25	22	88.0 (68.8–97.5)	6.00 (5.86)
3∼4	43	39	90.7 (77.9–97.4)	6.90 (4.63)
5∼10	53	51	96.2 (87.0–99.5)	11.92 (5.98)
11∼20	43	42	97.7 (87.7–99.9)	16.41 (6.05)
21–30	13	13	100.0 (83.2–100.0)	9.39 (6.17)
31–41	20	19	95.0 (78.9–99.9)	5.95 (4.37)
Total	221	208	94.1 (90.2–96.8)	9.78 (6.84)