Table 3.

Accuracy of NTS urgency level and ‘final’ urgency allocation for detecting LTE (prevalence of 16.6%) of 1833 callers who called the OHS-PC with SOB

	NTS urgency allocation (95% CI)	‘Final’ urgency allocation (95% CI)
Sensitivity	0.56 (0.50–0.61)	0.54 (0.48–0.60)
Specificity	0.61 (0.58–0.63)	0.65 (0.63–0.67)
Positive predictive value	0.22 (0.19–0.25)	0.24 (0.21–0.27)
Negative predictive value	0.87 (0.85–0.89)	0.88 (0.86–0.89)

LTE life-threatening events, NTS Netherlands triage standard, OHS-PC out-of-hours primary care, SOB: shortness of breath