Table 2.

Prognostic performance of the NICE traffic light system for detecting serious illness

Test performance for detecting children with a serious illnessSensitivity, % (95% CI)Specificity, % (95% CI)Positive predictive value, %Negative predictive value, %
Red category only58.8 (32.9 to 81.6)68.5 (67.4 to 69.6)0.599.8
Red or amber category100 (80.5 to 100)5.7 (5.2 to 6.3)0.3100
  • NICE = National Institute for Health and Care Excellence.