Table 4.

Results of the Ordinary Least Squares Regression Analyses Demonstrating Association Between Invalidation, Age, Use of Complementary and Alternative Medicine, Marital Status, and Income on Quality of Life of Respondents With Fibromyalgia^a

Regression Model
				95% CI for B
Variables	Levels	Bb	βc	Lower Bound	Upper Bound	P Value
Intercept	None	64.10		55.48	72.71	< .001
Invalidation	None	−5.66	−0.31	−7.06	−4.27	< .001
Age	None	0.19	0.12	0.07	0.302	< .05
Use of complementary and alternative medicine	Yes	3.16	0.09	0.57	5.76	< .05
No*
Marital status	Married	3.64	0.1	0.88	6.39	< .05
	Single/divorced/separated/widowed*
Income	> $50,000	7.33	0.21	4.69	9.96	< .001
	≤ $50,000*
Model Characteristics
n = 583	R2 = 0.22	Adjusted R2 = 0.216		F = 32.98		Significance level < .001

^aMultiple linear regression analysis stepwise method. Significance level = .05.

^bB = unstandardized regression coefficient.

^cβ = standardized regression coefficient.

Symbol: * = reference category.