TABLE 3.

Predictive use of HSV CSF PCR for diagnosis of HSE^a

Pretest probability (%) of HSE	Posttest probability (%)
	CSF PCR positive	CSF PCR negative
5 (low)	83.5	0.2
35 (medium)	98	2
60 (high)	99	6

^aReprinted with permission from Excerpta Medica (229).