Relationship between sacral-abdominal wall distance, movement performance, and spinal alignment in osteoporosis: a retrospective study

Table 5 Multiple regression analysis results for SAD

Factor	β	SE(β)	stdβ	t-val
CCI (points)	1.90	0.82	0.10	2.31*
Age (years)	0.18	0.17	0.05	1.04
Abdominal circumstance (cm)	1.04	0.16	0.43	6.41**
Frailty Index (points)	-1.23	1.12	-0.05	-1.11
Bone Mineral Density (Hip neck; g/cm²)	14.42	12.35	0.05	1.17
BMI (kg/m²)	0.89	0.48	0.13	1.84
VAS (lumber)	0.16	0.55	0.01	0.30
SVA (mm)	0.09	0.03	0.17	3.39**
PT (^°)	0.71	0.12	0.31	6.14**
R	0.78
RR	0.61
adjRR	0.60

SAD: abdominal wall-sacral distance, β: partial regression coefficient, SE(β): standard deviation ofβ, stdβ: standard deviation coefficient, t-val: significance of correlation with objective variable, R: multiple correlation coefficient, RR: coefficient of determination, adjRR: after adjustment for determination factor, CCI: Charlson Comorbidity index, BMI: body mass index, VAS: Visual Analogue Scale, SVA: sagittal vertical axis, PT: pelvic tilt. *P < 0.05, **P < 0.001.

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