Table 4.

Results of the multiple linear regression analysis—assessing the relationships between World Health Organization Quality of Life-Bref (WHOQOL-Bref) and Functional Assessment of Cancer Therapy-Breast (FACT-B) scores with the observed parameters.

Characteristics	Unstandardized Coefficients		Standardized Coefficients	t	p	95% CI		Collinearity Statistics
Model	B	Std. Error	β			Lower	Upper	Tolerance	VIF
OVERALL QUALITY OF LIFE AND GENERAL HEALTH				R2 = 0.251; F = 23.371, df = 6, p < 0.001
Constant	6.12	0.63		9.720	0.000	4.88	7.35
Age	0.002	0.01	0.013	0.261	0.794	−0.01	0.02	0.71	1.41
Education	0.43	0.060	0.340	7.188	0.000	0.31	0.55	0.80	1.25
Marital status	0.31	0.159	0.093	1.943	0.053	−0.01	0.62	0.78	1.28
Comorbidity	−1.02	0.163	−0.271	−6.232	0.000	−1.34	−0.70	0.95	1.06
Years since surgery	0.045	0.013	0.158	3.336	0.001	0.02	0.07	0.80	1.26
Type of surgery	0.554	0.150	0.181	3.702	0.000	0.26	0.85	0.75	1.33
DEPENDENT VARIABLE: PSYCHOLOGICAL DOMAIN				R2 = 0.548; F = 29.921, df = 6, p < 0.001
Constant	18.79	1.805		10.406	0.000	15.237	22.334
Age	−0.058	0.019	−0.147	−3.027	0.003	−0.095	−0.020	0.708	1.413
Education	1.422	0.171	0.379	8.300	0.000	1.085	1.758	0.801	1.248
Marital status	0.893	0.455	0.091	1.962	0.050	−0.002	1.788	0.784	1.275
Comorbidity	−2.322	0.469	−0.208	−4.954	0.000	−3.244	−1.401	0.946	1.057
Years since surgery	0.122	0.039	0.145	3.165	0.002	0.046	0.198	0.796	1.256
Type of surgery	0.527	0.430	0.058	1.227	0.221	−0.318	1.372	0.752	1.330
SOCIAL RELATIONSHIPS DOMAIN				R2 = 0.441; F = 55.027, df = 6, p < 0.001
Constant	6.019	0.860		6.996	0.000	4.328	7.710
Age	−0.020	0.009	−0.097	−2.229	0.026	−0.038	−0.002	0.708	1.413
Education	0.559	0.082	0.280	6.846	0.000	0.398	0.719	0.801	1.248
Marital status	2.840	0.217	0.541	13.092	0.000	2.414	3.266	0.784	1.275
Comorbidity	−0.468	0.223	−0.079	−2.096	0.037	−0.907	−0.029	0.946	1.057
Years since surgery	0.035	0.018	0.078	1.903	0.058	−0.001	0.071	0.796	1.256
Type of surgery	0.084	0.205	0.017	0.412	0.681	−0.318	0.487	0.752	1.330
SOCIAL/FAMILY WELL-BEING SUBSCALE				R2 = 0.391; F = 44.700, df = 6, p < 0.001
Constant	22.36	1.538		14.535	0.000	19.332	25.378
Age	−0.086	0.016	−0.239	−5.257	0.000	−0.118	−0.054	0.708	1.413
Education	0.482	0.146	0.141	3.300	0.001	0.195	0.769	0.801	1.248
Marital status	3.609	0.388	0.401	9.307	0.000	2.847	4.372	0.784	1.275
Comorbidity	−2.970	0.399	−0.292	−7.436	0.000	−3.755	−2.185	0.946	1.057
Years since surgery	0.114	0.033	0.148	3.463	0.001	0.049	0.178	0.796	1.256
Type of surgery	−0.253	0.366	−0.030	−0.692	0.490	−0.973	0.466	0.752	1.330

Notes: β—Beta coefficient in regression ANOVA analysis of potential predictors; CI—confidence interval.