Accuracy of telephone triage in patients suspected of transient ischaemic attack or stroke: a cross-sectional study

Table 4 Accuracy of adequate NTS urgency and final urgency allocation for detecting TIA/stroke/other LTEs

		Adequate NTS urgency allocation^c Value (95% CI)	Adequate final urgency allocation^c Value (95% CI)
TIA/stroke^a	Sensitivity	0.71 (0.68–0.75)	0.86 (0.84–0.89)
	Specificity	0.46 (0.42–0.50)	0.38 (0.34–0.42)
	Positive predictive value	0.41 (0.38–0.43)	0.42 (0.40–0.44)
	Negative predictive value	0.75 (0.72–0.78)	0.84 (0.81–0.87)
Other LTEs^b	Sensitivity	0.74 (0.61–0.84)	0.82 (0.70–0.91)
	Specificity	0.40 (0.37–0.43)	0.32 (0.30–0.35)
	Positive predictive value	0.06 (0.05–0.07)	0.06 (0.05–0.06)
	Negative predictive value	0.97 (0.95–0.98)	0.97 (0.95–0.98)
TIA/stroke and other LTEs	Sensitivity	0.72 (0.68–0.75)	0.86 (0.83–0.89)
	Specificity	0.48 (0.43–0.52)	0.40 (0.36–0.44)
	Positive predictive value	0.62 (0.60–0.64)	0.63 (0.62–0.65)
	Negative predictive value	0.58 (0.54–0.62)	0.70 (0.66–0.74)

^aPrevalence TIA/minor stroke 34.2% and prevalence major stroke 15.8%; ^bPrevalence other LTEs 4.8%; ^cFor TIA/minor stroke urgencies U1, U2 and U3 were all considered adequate, for major stroke and other LTEs urgencies U1 and U2 were considered adequate

ISSN: 2731-4553