Interobserver and Intraobserver Reliability in the Radiologic Assessment of Lumbar Interbody Fusion.

Study Design: Retrospective cohort study comparing intraobserver and interobserver reliability of 3 different radiologic fusion classifications following uninstrumented single-level anterior lumbar interbody fusion.

Objective Of The Study: The objective of the study was to compare the intraobserver and interobserver reliability of 3 different radiologic spinal fusion scoring systems.

Summary Of Background Data: Knowledge regarding radiologic spinal fusion is crucial when studying patients that were treated with lumbar interbody fusion.

The reliability of four widely used patellar height ratios.

Purpose: The objective of this study was to evaluate the inter-observer reliability and the intra-observer reliability of four patellar height ratios: Insall-Salvati (IS), modified Insall-Salvati (MIS), Blackburne-Peel (BP) and Caton-Deschamps (CD).

Methods: The patellar height ratios were assessed by four independent examiners using weight-bearing lateral knee radiographs in 30° flexion. Intra-class correlation coefficients and Fleiss' kappa's were determined.