Table 2. Accuracy of CTP, NCCT and CTA in detection acute posterior circulation stroke.

Study	Sensitivity(95%CI)	Specificity(95%CI)	TP	FP	TN	FN
CTP
Sporns2016	77(70–82)	92(84–97)	144	6	73	44
van der Hoeven2015	74(58–86)	93(82–99)	31	3	43	11
pooled	76(70–81)	93(87–97)
NCCT
Sporns2016	21(16–29)	96(89–99)	40	3	76	148
van der Hoeven2015	31(18–47)	98(88–100)	13	1	45	29
pooled	23(18–29)	97(92–99)
CTA
Sporns2016	44(36–51)	97(91–100)	82	2	77	106
van der Hoeven2015	33(20–50)	98(88–100)	14	1	45	28
pooled	42(35–48)	98(93–100)