Table 4.

The Association of Fatigue with Quality of Life

	Model 1			Model 2			Model 3
	Block	B	ΔR2	Block	B	ΔR2	Block	B	ΔR2
Constant		1.05*			1.22*			1.22*
Demographics/ Clinical Factors	1		.02	1		.02	1		.02
Age		−0.0001			−0.0004			−0.0004
Female		0.02			0.02			0.02
Minority		−0.004			0.002			0.002
Diffuse SSc†		−0.01			−0.02*			−0.02*
Overlap SSc†		−0.004			−0.008			−0.008
Diagnosis year		−0.0004			−0.0003			−0.0003
Fatigue	2	−0.005*	.33*	2	−0.001*	.33*	3	−0.001*	.01*
Pain interference				3	−0.004*	.21*	2	−0.004*	.53*
Depressive symptoms					−0.002*			−0.002*
Total Model R2			.35			.56			.56

Note. Quality of Life was measured using the EuroQol 5D-5L instrument. Fatigue, Pain Interference, and Depressive symptoms are scales taken from the PROMIS 29 v.2. Hierarchical regression models were constructed with variable(s) entered in blocks. Beta coefficients included in the table are from full models; ΔR2 is shown for Pain Interference and Depressive symptoms in combination as they were entered together in a block. N=266 in all models (1 participant had missing data for SSc type).

^†Reference group: Limited or sine scleroderma

^*p ≤ .05