The classification of coronal deformity based on preoperative global coronal malalignment for adult spinal deformity is questionable

Table 4 Main and interaction effects of preoperative pattern and GCM on postoperative coronal imbalance

	Postoperative GCM				Postoperative imbalance/balance ratio
	F value	P value	Partial η²	Observed power	F value	P value	Partial η²	Observed power
Preoperative Pattern	14.286	0.000	0.117	0.963	30.514	0.000	0.220	1.000
Preoperative GCM	0.076	0.783	0.001	0.059	0.000	0.996	0.000	0.050
Preoperative pattern*GCM	0.687	0.409	0.006	0.130	2.486	0.118	0.023	0.346

ISSN: 1471-2474