Table 6.

Univariate model for physical component scale.

Variable	β	95% CI	R²	p
Age	−0.19	−0.26, −0.04	0.03	0.005
Hispanic ethnicity	−0.09	−7.18, 1.31	0.009	0.17
Z-AHI^*	0.15	0.57, 8.30	0.02	0.02
Education	0.17	0.47, 3.65	0.03	0.01
SLEDAI	−0.15	−0.50, −0.03	0.02	0.02
SDI	−0.03	−0.94, 0.53	0.001	0.59

↵* US dollars (unit = 1000). Z-AHI: zip code-based annual household income; SLEDAI: Systemic Lupus Erythematosus Disease Activity Index; SDI: American College of Rheumatology Damage Index.