Variations in lower limb alignments indicate pelvic tilt after total hip arthroplasty

Table 3 Interclass comparison of sagittal alignments and cup orientations

	Non-degenerative Lumbar Spine	Degenerative Lumbar Spine	p value
ΔPT	-24.4 ± 12.5	-17.6 ± 10.7	0.0008^*
ΔSS	23.3 ± 12.9	16.3 ± 11.7	0.0012^*
ΔLL	-34.8 ± 15.2	-21.7 ± 12.2	< 0.0001^*
ΔTK	4.5 ± 6.7	-0.1 ± 4.7	< 0.0001^*
ΔSVA	-56.8 ± 31.6	-36.4 ± 28.6	0.0001^*
ΔPFA	-77.6 ± 13.1	-78.3 ± 6.9	0.4877^**
ΔRA	-15.5 ± 11.1	-12 ± 8.4	0.0920^**
ΔRI	-10.8 ± 11.5	-5.6 ± 7.5	0.0055^**
AF	0.8 ± 6.2	-2.8 ± 8.6	0.0141^**
KF	5.1 ± 3.3	6.8 ± 4.4	0.0268^**

Significance level,\(\alpha\), was set at 0.05. Data were expressed as mean ± standard deviation
‘Δ’ refers to changes from sitting to standing. PT Spinopelvic tilt or pelvic tilt, SS Sacral slope, PI Pelvic incidence, LL Lumbar lordosis, TK Thoracic kyphosis, SVA Sagittal vertical axis, PFA Proximal femoral angle, RA Radiographic anteversion, RI Radiographic inclination, KF Knee flexion angle, AF Ankle dorsiflexion angle
*p values from Student’s t test
**p values from Mann-Whitney U test

ISSN: 1471-2474