Response to Letter to the Editor regarding, “potential significance of facet joint fusion or posteromedial fusion observed on CT imaging following attempted posterolateral or posterior interbody fusion”

We appreciate Farrohki et al. for their interest in our study of facet joint fusion and their thoughtful comments regarding the statistical methods employed. They suggest that the Friedman test would have been a more appropriate method as opposed to one-way ANOVA given analysis of three separate time points (preoperative, 6 months, and 12 months). The Friedman test is indeed considered a reasonable non-parametric alternative to the one-way ANOVA with repeated measures, but we have consulted another biostatistician in addition to our original statistician and both feel that the one-way ANOVA with repeated measures is a valid option and better suited to address our primary study questions.
Source: The Spine Journal - Category: Orthopaedics Authors: Tags: Letters to the editor Source Type: research