Table 5.

Associations between SLE mortality risk index, race, and mortality.

Comorbidity Index	N	1-year crude mortality rate (Caucasian)	1-year crude mortality rate (African-American)	Multi-year hazard ratio* (95% CI) comparing African-Americans to Caucasians
0	3,489	8.3%	9.7%	1.39† (1.05 to 1.81)
2	1,380	32.1%	27.9%	0.95 (0.75 to 1.21)
3-5	940	42.5%	42.4%	1.11 (0.87 to 1.37)
>5	812	56.3%	59.2%	0.98 (0.78 to 1.20)

^*Adjusted for age, gender, income, education, and hospitalization characteristics in stratified (by comorbidity index score category) multivariable Cox proportional hazards models.

^†p-value = 0.017