Accuracy of Ottawa Ankle Rules to Exclude Fractures of the Ankle and Midfoot in Children: A Meta-analysis

被引:64
|
作者
Dowling, Shawn [1 ]
Spooner, Carol H. [2 ]
Liang, Yuanyuan [2 ]
Dryden, Donna M. [2 ]
Friesen, Carol [2 ]
Klassen, Terry P. [2 ]
Wright, R. Bruce [3 ]
机构
[1] Univ Calgary, Dept Emergency Med, Calgary, AB T2N 1N4, Canada
[2] Univ Alberta, Fac Med & Dent, Alberta Res Ctr Hlth Evidence, Edmonton, AB, Canada
[3] Univ Alberta, Dept Pediat, Fac Med & Dent, Edmonton, AB, Canada
关键词
Ottawa Ankle Rules; pediatric ankle injury; systematic review; DIAGNOSTIC-TEST; DECISION RULES; RADIOGRAPHY; VALIDATION; INJURIES; TRIAL; NEED;
D O I
10.1111/j.1553-2712.2008.00333.x
中图分类号
R4 [临床医学];
学科分类号
1002 ; 100602 ;
摘要
The objectives were to conduct a systematic review to determine the diagnostic accuracy of the Ottawa Ankle Rules (OAR) to exclude ankle and midfoot fractures in children and the extent to which x-ray use could be reduced without missing significant fractures. The authors conducted comprehensive searches of electronic databases and gray literature sources. Independent reviewers applied standard inclusion and exclusion criteria. The criterion standard diagnostic test was an ankle and/or foot x-ray or proxy measure to ensure no missed fractures. Standard 2 x 2 tables were constructed. Sensitivities and specificities were pooled using an approximation of the inverse variance; 95% confidence intervals (95% CIs) were calculated using the exact method. Likelihood ratios (LR +/-) and diagnostic odds ratios were combined under DerSimonian and Laird random effects model. A pooled analysis of 12 studies (N = 3,130) identified 671 fractures (prevalence = 21.4%). Ten studies reported Salter-Harris Type I (SH-I) fractures. The pooled sensitivity was 98.5% (95% CI = 97.3 to 99.2), suggesting that the OAR can be used to rule out a fracture. Four of 10 missed fractures were characterized: 1 SH-I, 1 SH-IV, and 2 "insignificant fractures" (either SH-I or avulsion fractures < 3 mm). The pooled estimate for rate of x-ray reduction was 24.8% (95% CI = 23.3% to 26.3%; range = 5% to 44%). The OAR appear to be a reliable tool to exclude fractures in children greater than 5 years of age presenting with ankle and midfoot injuries. Employing the OAR would significantly decrease x-ray use with a low likelihood of missing a fracture.
引用
收藏
页码:277 / 287
页数:11
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