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Evid Based Nurs 7:24 doi:10.1136/ebn.7.1.24
  • Assessment (screening or diagnosis)

The Ottawa Knee Rules accurately identified fractures in children with knee injuries

Operating characteristics of the Ottawa Knee Rules for identifying knee fractures in children according to age*

Age groups Sensitivity (95% CI) Specificity (CI) +LR −LR
*LR  =  likelihood ratio. Diagnostic terms defined in glossary. −LRs calculated from data in article.
2–5 y (n = 45) 100% (48 to 100) 60% (43 to 75) 2.5 0
6–12 y (n = 375) 100% (89 to 100) 47% (42 to 52) 1.9 0
13–16 y (n = 330) 100% (90 to 100) 36% (30 to 41) 1.6 0
All children (n = 750) 100% (95 to 100) 43% (39 to 47) 1.7 0

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