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. Author manuscript; available in PMC: 2015 Feb 5.
Published in final edited form as: J Emerg Nurs. 2012 Jul 24;39(2):182–189. doi: 10.1016/j.jen.2011.12.020

TABLE 4.

Likelihood ratio performance for Pediatric Assessment Triangle–defined category of illness

N Positive LR (LR+) 95% CI Negative LR (LR−) 95% CI
Instability 58 1.2 1.2-1.3 0.12b 0.06-0.25
Respiratory distress 290 4.0a 3.1-4.8 0.11b 0.078-0.17
Respiratory failure 14 12.0¬*** 3.7-36.7 0.80c 0.55-1.06
Shock 109 4.2a 3.1-5.6 0.32b 0.17-0.60
CNS/metabolic disturbance 49 7.0a 4.3-11.4 0.58 0.43-0.78
Cardiopulmonary failure 11 49.1c 20.2-120.0 0.25c 0.046-1.39

CI, Confidence interval; CNS, central nervous system; LR, likelihood ratio.

a

Meets LR+ 95% confidence threshold criterion (LR+ min ≥ 2.8).

b

Meets LR− 95% confidence threshold criterion (LR− max ≤ 0.4).

c

Does not meet sample size requirement.