Table 2. Comparison of Sagittal Balance, Spinal Curvature, Spinopelvic Parameters, and Lower Limb Parameters between WSX and EOS in Sagittally Imbalanced Patients^†.

		WSX	EOS	p value
Sagittal balance
	C2-C7 SVA (mm)	21±47.2	21.8±15.3	0.644
	C2-HA (°)	5.3±6.9	5.3±6.3	0.973
	C7-HA (°)	5.4±7.0	4.9±7.2	0.320
	C7-SVA (mm)	58.4±17.0	48.9±57.3	0.018*
	TPA (°)	26.1±13.9	22.9±12.0	0.002*
Spinal curvature (°)
	T1-slope	21.7±11.1	20.9±10.7	0.352
	C0-C2 angle	-30±10.2	-28.1±12.8	0.461
	C2-C7 lordosis	-12.6±14.8	-8.2±13.7	0.008*
	T2-T5 angle	9.5±15.9	10±9.9	0.456
	T5-T12 angle	21±14.4	17.7±14.4	0.001*
	T2-T12 angle	26.6±14.6	23.6±14.5	0.010*
	T10-L2 angle	11.3±10.6	8.9±16.7	0.133
Spinopelvic parameters (°)
	PI	54.2±8.7	54.6±11.7	0.697
	LL	-30.5±17.5	-30.8±15.1	0.851
	PI-LL	23.7±9.8	23.9±17.3	0.837
	PT	27.4±11.6	24.9±10.9	0.003*
	SS	26.5±14.6	29.2±8.9	0.006*
Lower limb parameter (°)
	SFA	150.4±51.5	152.5±23.4	0.519

WSX, conventional whole spine X-ray; SVA, sagittal vertical axis; TPA, T1-pelvic angle; PI, pelvic incidence; LL, lumbar lordosis; PT, pelvic tilt; SS, sacral slope; SFA, sacrofemoral angle.

Descriptive data are presented as mean±standard deviation.

^*p<0.05; ^†Sagittal imbalanced patients had one of the following conditions: PI-LL >10°, SVA >5 cm, and PT >20° on WSX. Positive values signify an anterior position of the vertical plumb line with respect to the caudal landmark for translation measurements and kyphosis for angular measurements.