Table 6.

Results of linear regression analysis (stepwise regression) for quality-of-life predictors (N  = 118).

Factor	Model	R	R 2	R change	Unstandardized coefficient		t-test	Sig.
Quality of life (WOMAC)	1a	0.609	0.365	0.371	B	Std. error	46.021	<0.001 ∗∗
					2.321	0.050
					0.257	0.031	8.270	<0.001 ∗∗
	2b	0.628	0.394	0.023	2.641	0.161	16.393	<0.001 ∗∗
					0.263	0.031	8.543	<0.001 ∗∗
					0.005	0.002	2.093	0.039 ∗

^aPredictors: constant and gender. ^bPredictors: constant, gender, and age. p value significant at ^∗∗<0.01 and ^∗<0.05.