Figure 2
From: Effects of preoperative sagittal spinal imbalance on pain after lateral lumbar interbody fusion
Dendrograms of the hierarchical classification of patients who received LLIF surgery (n = 81). (A) The numbers of patients in each cluster at different Ward’s distances are shown. The patients were classified into groups 1 (n = 30) and 2 (n = 51) from the cluster analysis. Standing full-length X-ray lateral views of typical cases in groups 1 (B) and 2 (C).
