TABLE 1.

DNA PCR, viral culture, and RT-PCR results from samples from 106 patients tested for HHV-6

Result of viral culture (DNA PCR result)	RT-PCR resulta		Predictive value (%)		Sensitivity (%)	Specificity (%)
	+	−	Positive	Negative
Positive (positive)	19	3b	95		95
Negative (negative)	1	55		98.8c		98.8c
Negative (positive)	0	28

^a+, positive; −, negative. 

^bSamples from two patients were positive for HHV-7 and HHV-6 by viral culture and DNA PCR but negative for HHV-6 by RT-PCR; these are excluded from analysis (see text). 

^cCalculated by using both the Negative (negative) and Negative (positive) values.