Modulation and Predictors of Periprosthetic Bone Mineral Density following Total Knee Arthroplasty

Table 4

Changes of periprosthetic bone mineral density. Values are presented as mean (standard deviation).

Variable	Pretest; ( = 23)	Posttest; ( = 23)	Mean difference; (95% CI)			Power	CHBMD (%)
ROI-T1, g/cm^2	0.93 (0.15)	0.95 (0.22)	0.02 (−0.05; 0.09)	0.629	0.10	0.08	1.70 (16.58)
ROI-T2, g/cm^2	0.93 (0.14)	0.89 (0.22)	−0.04 (−0.11; 0.03)	0.271	0.21	0.16	−4.04 (17.19)
ROI-T3, g/cm^2	1.04 (0.12)	0.98 (0.18)	−0.05 (−0.12; 0.02)	0.135	0.38	0.41	−5.30 (16.38)
ROI-F4, g/cm^2	0.98 (0.11)	0.78 (0.34)	−0.20 (−0.34; −0.06)	0.004^**	0.67	0.86	−19.65 (32.14)

ROI, region of interest; T, tibia; F, femur; 95% CI, 95% confidence interval; , Cohen’s effect size; CHBMD, percentage change of periprosthetic bone mineral density.
A significant difference ().