Table 3.

The Association of Fatigue with Physical Function

	Model 1			Model 2			Model 3
	Block	B	ΔR2	Block	B	ΔR2	Block	B	ΔR2
Constant		66.41*			76.51*			76.51*
Demographics/ Clinical Factors	1		.03	1		.03	1		.03
Age		−0.07*			−0.09*			−0.09*
Female		0.84			1.13			1.13
Minority		0.47			1.00			1.00
Diffuse SSc†		−1.84*			−2.05*			−2.05*
Overlap SSc†		−1.23			−1.15			−1.15
Diagnosis year		−0.07			−0.06			−0.06
Fatigue	2	−0.36*	.27*	2	−0.16*	.27*	3	−0.16*	.03*
Pain interference				3	−0.35*	.13*	2	−0.35*	.37*
Depressive symptoms					−0.03			−0.03
Total Model R2			.30			.43			.43

Note. Fatigue, Physical Function, 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