Table 1.

Characteristics at the time of incident ESRD in US patients in whom treatment for ESRD attributed to lupus nephritis was initiated between July 1, 2005 and September 30, 2011^*

Patient factors
Age, mean ± SD years (n = 6,594)	39.6 ± 15.4
Sex (n = 6,594)
Female	81.1
Male	18.9
Race/ethnicity (n = 6,594)
White	24.7
Black	49.7
Hispanic	17.7
Other	7.9
Insurance (n = 6,594)
Private	37.4
Medicare/other†	18.4
Medicaid	32.8
None	11.5
Smoking (n = 6,594)
Yes	4.3
No	95.7
BMI, mean ± SD kg/m2 (n = 6,522)	26.9 ± 7.4
BMI ≥35 kg/m2 (n = 6,522)
Yes	12.6
No	87.4
No. of comorbidities (n = 6,594)
0	10.9
1	56.0
≥2	33.1
Hypertension (n = 6,594)
Yes	83.6
No	16.4
CVD (n = 6,594)
Yes	18.6
No	81.4
Serum albumin, mean ± SD gm/dl (n = 5,201)	2.9 ± 0.8
Serum hemoglobin, mean ± SD gm/dl (n = 6,124)	9.5 ±1.7
ESRD Network (n = 6,549)
1 (CT, ME, MA, NH, RI, VT)	2.5
2 (NY)	7.5
3 (NJ)	3.9
4 (DE, PA)	3.5
5 (DC, MD, VA, WV)	5.6
6 (GA, NC, SC)	10.3
7 (FL)	7.0
8 (AL, MS, TN)	6.3
9 (IN, KY, OH)	5.1
10 (IL)	4.6
11 (MI, MN, ND, SD, WI)	6.2
12 (IA, KS, MO, NE)	2.7
13 (AR, LA, OK)	4.1
14 (TX)	10.6
15 (AZ, CO, NM, NV, UT, WY)	5.1
16 (AK, ID, MT, OR, WA)	2.3
17 (HI, Northern CA)	5.1
18 (Southern CA)	7.6
Patient residential neighborhood (ZCTA) factors, median (IQR) %
Black race	14.1 (3.7–41.4)
Hispanic ethnicity	9.9 (3.4–29.9)
Dropped out of high school	16.7 (10.1–24.4)
Income below poverty level	16.5 (9.8–24.9)

^*Except where indicated otherwise, values are the percent of patients. ESRD = end-stage renal disease; BMI = body mass index; CVD = cardiovascular disease (including pericarditis); ZCTA = ZIP code tabulation area; IQR = interquartile range.

^†Includes Medicare (n = 681), VA (n = 47), and other (n = 483).