Table 3.
Average Incidence Rates of SLE and LN among Medicaid-enrolled Adults, per 100,000 person-years, by Sociodemographic Group, 2002–2004
| SLE | Lupus Nephritis (LN) | ||||||
|---|---|---|---|---|---|---|---|
| Denominator (Person-Years) |
Cases (% of total) | Incidence Rate | 95% CI | Cases (% of total) | Incidence Rate | 95% CI | |
| Total | 15,064,937 | 3,490 (100) | 23.17 | 22.41–23.95 | 1,034 (100) | 6.85 | 6.44–7.28 |
| Sex | |||||||
| Female | 10,774,905 | 3,282 (94.0) | 30.46 | 29.44–31.52 | 971 (93.9) | 8.98 | 8.43–9.56 |
| Male | 4,290,031 | 208 (6.0) | 4.85 | 4.23–5.55 | 63 (6.1) | 1.47 | 1.15–1.88 |
| Age (years) | |||||||
| 18–29 | 5,650,736 | 807 (23.1) | 14.28 | 13.33–15.30 | 291 (28.1) | 5.14 | 4.59–5.77 |
| 30–49 | 6,426,860 | 1,795 (51.4) | 27.93 | 26.67–29.25 | 485 (46.9) | 7.52 | 6.88–8.22 |
| 50–64 | 2,987,340 | 888 (25.4) | 29.73 | 27.83–31.75 | 258 (25.0) | 8.60 | 7.61–9.72 |
| Race/Ethnicity | |||||||
| African-American | 4,501,676 | 1,404 (40.2) | 31.19 | 29.60–32.86 | 481 (46.5) | 10.65 | 9.74–11.65 |
| Female | 3,428,004 | 1,324 (37.9) | 38.62 | 36.60–40.76 | 462 (44.7) | 13.43 | 12.26–14.71 |
| Male | 1,073,672 | 80 (2.3) | 7.45 | 5.98–9.28 | 19 (1.8) | 1.77 | 1.13–2.77 |
| Hispanic | 2,278,325 | 506 (14.5) | 22.21 | 20.36–24.23 | 157 (15.2) | 6.88 | 5.88–8.04 |
| Female | 1,703,102 | 485 (13.9) | 28.48 | 26.05–31.13 | 151 (14.6) | 8.84 | 7.54–10.37 |
| Male | 575,224 | 21 (0.6) | 3.65 | 2.38–5.60 | NR* | NR* | NR* |
| White | 6,524,850 | 1,172 (33.6) | 17.96 | 16.96–19.02 | 266 (25.7) | 4.07 | 3.61–4.59 |
| Female | 4,514,842 | 1,101 (31.5) | 24.39 | 22.99–25.87 | 239 (23.1) | 5.28 | 4.65–5.99 |
| Male | 2,010,008 | 71 (2.0) | 3.53 | 2.80–4.46 | 27 (2.6) | 1.34 | 0.92–1.96 |
| Asian | 713,474 | 119 (3.4) | 16.68 | 13.94–19.96 | 39 (3.8) | 5.46 | 3.99–7.47 |
| Female | 449,005 | 108 (3.1) | 24.05 | 19.92–29.05 | 34 (3.3) | 7.56 | 5.40–10.57 |
| Male | 264,469 | 11 (0.3) | 4.16 | 2.30–7.51 | NR* | NR* | NR* |
| Native American | 156,639 | 47 (1.3) | 30.01 | 22.54–39.94 | 11 (1.1) | 7.00 | 3.88–12.64 |
| Female | 115,240 | 43 (1.2) | 37.31 | 27.67–50.31 | 11 (1.1) | 9.51 | 5.26–17.17 |
| Male | NR* | NR* | NR* | NR* | NR* | NR* | NR* |
| Other | 889,974 | 242 (6.9) | 27.19 | 23.97–30.84 | 80 (7.7) | 8.95 | 7.19–11.15 |
| Female | 564,714 | 221 (6.3) | 39.13 | 34.30–44.65 | 74 (7.2) | 13.03 | 10.37–16.36 |
| Male | 325,260 | 21 (0.6) | 6.46 | 4.21–9.90 | NR* | NR* | NR* |
| Geographic Region | |||||||
| South | 3,872,032 | 1,077 (30.9) | 27.81 | 26.20–29.53 | 353 (34.1) | 9.09 | 8.19–10.09 |
| Northeast | 4,243,303 | 875 (25.1) | 20.62 | 19.30–22.03 | 230 (22.2) | 5.41 | 4.75–6.16 |
| Midwest | 2,987,033 | 611 (17.5) | 20.46 | 18.90–22.14 | 198 (19.1) | 6.61 | 5.75–7.60 |
| West | 3,962,569 | 927 (26.6) | 23.39 | 21.94–24.95 | 253 (22.7) | 6.37 | 5.63–7.20 |
*
Data on 10 or fewer individuals were not reported (NR) to protect privacy