LiLa-Klassifikation für Frakturen  der langen Röhrenknochen im Wachstumsalter

Kamphaus, A.; Rapp, M.; Wessel, L. M.; Buchholz, M.; Massalme, E.; Schneidmüller, D.; Roeder, Christoph; Kaiser, M. M. (2013). LiLa-Klassifikation für Frakturen  der langen Röhrenknochen im Wachstumsalter. Unfallchirurg, 118(4), pp. 326-335. Springer-Medizin-Verlag 10.1007/s00113-013-2496-9

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Background. There are two child-specific fracture classification systems for long bone fractures: the AO classification of pediatric long-bone fractures (PCCF) and the LiLa classification of pediatric fractures of long bones (LiLa classification). Both are still not widely established in comparison to the adult AO classification for long bone fractures.
Methods. During a period of 12 months all long bone fractures in children were documented and classified according to the LiLa classification by experts and non-experts. Intraobserver and interobserver reliability were calculated according to Cohen (kappa).
Results. A total of 408 fractures were classified. The intraobserver reliability for location in the skeletal and bone segment showed an almost perfect agreement (K=0.91-0.95) and also the morphology (joint/shaft fracture) (K=0.87-0.93). Due to different judgment of the fracture displacement in the second classification round, the intraobserver reliability of the whole classification revealed moderate agreement (K=0.53-0.58). Interobserver reliability showed moderate agreement (K=0.55) often due to the low quality of the X-rays. Further differences occurred due to difficulties in assigning the precise transition from metaphysis to diaphysis.
Conclusions. The LiLa classification is suitable and in most cases user-friendly for classifying long bone fractures in children. Reliability is higher than in established fracture specific classifications and comparable to the AO classification of pediatric long bone fractures. Some mistakes were due to a low quality of the X-rays and some due to difficulties to classify the fractures themselves. Improvements include a more precise definition of the metaphysis and the kind of displacement. Overall the LiLa classification should still be considered as an alternative for classifying pediatric long bone fractures.

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