TABLE 2.

Maximum serum titer associations

Study and titer	No. (%) of cases
	PUC	PCC	DC	CM
Current study
≤16	207 (83)	32 (50)	17 (20)	15 (42)
≤32	233 (94)	39 (61)	25 (29)	20 (56)
Study by Smith et al. (5)
≤16	(91–98)	NTa	(12–23)	(41–62)
≤32	(97–99)	NT	(27–40)	(75–81)

^aNT, not tested explicitly.