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 |