Table 3.

Linear regression analysis with the effect of side on total hip and femoral neck

	High-impact group			Low-impact group			Control group			p value for interaction
										LIG vs. HIG	CG vs. LIG	CG vs. HIG
	Coef.	95% conf.	p	Coef.	95% conf.	p	Coef.	95% conf.	p
Total hip BMD (g/cm2)	0.009	− 0.000–0.018	0.052	− 0.012	− 0.02 to − 0.004	0.004	− 0.006	− 0.017–0.005	0.294	0.001	0.429	0.048
Total hip Z-score	0.1	− 0.0–0.1	0.105	− 0.1	− 0.1 to − 0.0	0.008	− 0.1	− 0.1–0.0	0.169	0.002	0.685	0.041
Total hip BMC (g)	0.4	0.0–0.8	0.041	− 0.3	− 0.7–0.0	0.066	0.0	− 0.5–0.5	0.940	0.005	0.272	0.239
Total hip area (cm2)	0.1	− 0.1–0.2	0.402	0.1	− 0.1–0.2	0.435	0.2	− 0.1–0.4	0.160	0.966	0.498	0.531
Femoral neck BMD (g/cm2)	0.011	0.001–0.022	0.039	− 0.011	− 0.021 to − 0.000	0.040	− 0.155	− 0.031 to − 0.000	0.045	0.004	0.623	0.005
Femoral neck Z-score	0.1	− 0.0–0.2	0.082	− 0.1	− 0.2–0.0	0.057	− 0.1	− 0.2 to − 0.0	0.049	0.011	0.575	0.009
Femoral neck BMC (g)	0.1	− 0.1–0.2	0.385	0.0	− 0.2–0.1	0.485	0.0	− 0.2–0.2	0.864	0.294	0.589	0.750
Femoral neck area (cm2)	0.0	− 0.1–0.1	0.958	0.0	− 0.1–0.1	0.606	0.1	− 0.1–0.3	0.345	0.770	0.493	0.367

Dominant foot is the reference side