Table 4.

Cut-off point of cycle threshold (Ct) between modified measles and other measles in a real-time reverse transcription PCR in a modified measles dominated outbreak, Yamagata, Japan, 2017

Specimen	Cut-off point, Ct	Sensitivity	Specificity	AUC (95% CI)	MeV-RNA copies per tube
PBMC	33.07	0.72	0.82	0.78 (0.63–0.93)	1.0 × 102
Throat swab	28.95	0.77	0.82	0.84 (0.68–0.99)	1.7 × 103
Urine	27.34	0.71	1.00	0.83 (0.67–0.99)	5.0 × 103

AUC, area under the curve; PBMC, peripheral blood mononuclear cells.