. 2021 Dec 8;9(12):1703. doi: 10.3390/healthcare9121703

Table 3.

Multiple regression analysis between demographic characteristics and SF-36 in control and osteoarthritis groups.

Demographic Characteristics		Control Group (n = 30) Adj-R² = 0.196				OA Group (n = 60) Adj-R² = 0.104
		Unstandardized Coefficients		β	p-Value	Unstandardized Coefficients		β	p-Value
		B	95% CI	β	p-Value	B	95% CI	β	p-Value
Age		0.549	−0.404, 1.502	0.277	0.241	−0.926	−2.603, 0.751	−0.244	0.272
Sex = Female (RG = Male)		−5.426	−18.713, 7.861	−0.251	0.401	−2.670	−15.785, 10.445	−0.071	0.684
Height		0.509	−0.550, 1.569	0.286	0.325	−0.076	−0.966, 0.813	−0.026	0.864
Weight		−0.074	−0.749, 0.601	−0.059	0.819	0.066	−0.670, 0.802	0.029	0.858
History of chronic disease		−6.028	−14.446, 2.390	−0.355	0.149	4.412	−4.278, 13.102	0.191	0.312
Low-income households (RG = Not low)		5.483	−4.632, 15.599	0.205	0.269	−5.753	−16.593, 5.088	−0.150	0.291
Marital status (RG = Unmarried)	Widowed	−1.433	−20.263, 17.397	−0.059	0.874	−12.810	−33.501, 7.882	−0.337	0.219
Marital status (RG = Unmarried)	Married	−0.353	−14.911, 14.206	−0.016	0.960	−8.820	−29.126, 11.486	−0.219	0.387
Monthly disposable income		3.728	−0.979, 8.436	0.415	0.113	8.860	1.926, 15.794	0.347	0.013
Education (RG = Education ≤ 9 years)	9–12 years	−1.802	−12.387, 8.782	−0.081	0.724	−4.880	−19.665, 9.904	−0.121	0.510
Education (RG = Education ≤ 9 years)	>12 years	−7.390	−20.155, 5.374	−0.292	0.239	−0.907	−21.524, 19.709	−0.012	0.930
Number of insurances policies		−6.968	−21.170, 7.234	−0.288	0.315	−10.060	−19.928, −0.193	−0.266	0.046

Statistically significant mean difference (p < 0.05). B: Regression coefficient; CI: confidence intervals; β: standardized coefficients; Adj-R²: adjusted R squared.