The association of body-mass index and depressed mood with knee pain and activity limitations in knee osteoarthritis: results from the Amsterdam osteoarthritis cohort

Table 2 Association of BMI and depressed mood with knee pain

Analysis	Independent variables	B (95% CI)	β	p	Semi-partial r²× 100%
1.	BMI	0.07 (0.03, 0.12)	0.19	0.002	3.5%
2.	HADS depression	0.12 (0.04, 0.20)	0.17	0.005	2.9%
3.	BMI	0.06 (0.02, 0.11)	0.16	0.009	2.4%
3.	HADS depression	0.09 (0.01, 0.18)	0.14	0.025	1.8%
	Dominance analysis
	Overall average BMI	(0.035 + 0.024)/2 = 0.030			3.0%
	Overall average HADS depression	(0.029 + 0.018)/2 = 0.023			2.3%

Knee pain was measured with a numeric rating scale for knee pain during the last week. In all analyses we adjusted for age, gender, marital status, education level, radiographic OA and comorbidity. B (95% CI), regression coefficient ( 95% confidence interval). β, Standardized regression coefficient. Semi-partial r ², Squared semi-partial correlation coefficient. BMI, Body-mass index. HADS, Hospital Anxiety and Depression Scale.

ISSN: 1471-2474