Peri-prosthetic bone remodeling of hydroxyapatite-coated compaction short stem was not affected by stem alignment

Table 3 Relation between stem anterior tilt alignment and BMD change at 24 months post-operatively in the Gruen zones

	Outlier versus non-outlier (anterior tilt)
	HA full compaction					Tapered wedge
	Outlier (n = 48)	Non-outlier (n = 11)	p value	Effect size (Cohen’s d)	95% CI	Outlier (n = 24)	Non-outlier (n = 32)	p value	Effect size (Cohen’s d)	95% CI
Zone1	0.91 ± 0.14	0.87 ± 0.15	0.261	− 0.28	− 0.94 to 0.38	0.88 ± 0.10	0.95 ± 0.13	0.055	0.59	0.05 to 1.13
Zone2	0.91 ± 0.12	0.89 ± 0.08	0.492	− 0.18	− 0.83 to 0.48	0.98 ± 0.13	1.00 ± 0.11	0.845	0.17	− 0.36 to 0.70
Zone3	1.01 ± 0.06	0.99 ± 0.03	0.249	− 0.36	− 1.02 to 0.30	1.02 ± 0.10	1.05 ± 0.08	0.532	0.34	− 0.20 to 0.87
Zone4	1.04 ± 0.06	1.03 ± 0.06	0.799	− 0.17	− 0.82 to 0.49	1.02 ± 0.05	1.01 ± 0.05	0.769	− 0.30	− 0.83 to 0.23
Zone5	1.04 ± 0.09	1.02 ± 0.04	0.638	− 0.24	− 0.90 to 0.42	1.06 ± 0.14	1.03 ± 0.11	0.434	− 0.24	− 0.77 to 0.29
Zone6	0.95 ± 0.15	0.98 ± 0.07	0.904	0.22	− 0.44 to 0.87	1.00 ± 0.13	1.01 ± 0.14	0.984	0.07	− 0.46 to 0.60
Zone7	0.81 ± 0.21	0.84 ± 0.13	0.638	0.15	− 0.50 to 0.81	0.84 ± 0.15	0.83 ± 0.16	0.784	− 0.06	− 0.59 to 0.47

ISSN: 1749-799X