Table 2 Adjusted coefficients of determination (R ²), standardized beta coefficients (β), and level of significance (p) of the base model (age, sex, and BMI) and change in the base model R ² (Δ) when including bone mineral density (BMD) at the total and regional proximal tibia to predict variance in total WOMAC pain

From: Proximal tibial trabecular bone mineral density is related to pain in patients with osteoarthritis

		Total WOMAC
		R²	β	p value
Base model		0.16		0.023
	Age		−0.41	0.011
	Sex		0.19	0.206
	BMI		0.12	0.448
Total epiphyseal		0.28		0.003
	Δ	0.12		0.013
	Age		−0.41	0.007
	Sex		0.08	0.596
	BMI		0.18	0.234
	BMD		−0.38	0.013
Lateral epiphyseal		0.21		0.014
	Δ	0.06		0.083
	Age		−0.40	0.011
	Sex		0.12	0.420
	BMI		0.17	0.275
	BMD		−0.27	0.083
Medial epiphyseal		0.30		0.002
	Δ	0.15		0.006
	Age		−0.39	0.008
	Sex		0.12	0.388
	BMI		0.19	0.186
	BMD		-0.40	0.006
Total metaphyseal		0.27		0.004
	Δ	0.12		0.017
	Age		−0.35	0.019
	Sex		0.12	0.416
	BMI		0.15	0.302
	BMD		−0.35	0.017

BMI body mass index, BMD bone mineral density, WOMAC Western Ontario and McMaster Universities Arthritis Index
Significant values of R ², Δ, and β are in bold

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