Table 2.
Average Incidence Rates per 100,000 Medicaid-Enrolled Children per Year for SLE and Lupus Nephritis, 2002–2004
| SLE | Lupus Nephritis | |||||||
|---|---|---|---|---|---|---|---|---|
| Person-Years | Cases (% of total) | Incidence Rate | 95% CI | Person-Years | Cases (% of total) | Incidence Rate | 95% CI | |
| Total | 28,007,765 | 621 (100) | 2.22 | 2.05 – 2.40 | 28,009,598 | 203 (100) | 0.72 | 0.63 – 0.83 |
| Sex | ||||||||
| Female | 13,667,244 | 527 (84.9) | 3.86 | 3.54 – 4.20 | 13,668,718 | 171 (84.2) | 1.25 | 1.08 – 1.45 |
| Male | 14,340,521 | 94 (15.1) | 0.66 | 0.54 – 0.80 | 14,340,880 | 32 (15.8) | 0.22 | 0.16 – 0.32 |
| Age (years) | ||||||||
| 3–<6 | 6,689,394 | 9 (1.4) | 0.13 | 0.07 – 0.26 | 6,689,443 | 4 (2.0) | 0.06 | 0.02 – 0.16 |
| Female | 3,260,428 | 7 (1.1) | 0.21 | 0.10 – 0.45 | 3,260,459 | 3 (1.5) | 0.09 | 0.03 – 0.29 |
| Male | 3,428,966 | 2 (0.3) | 0.06 | 0.01 – 0.23 | 3,428,984 | 1 (0.5) | 0.03 | 0.00 – 0.21 |
| 6–<9 | 5,961,603 | 27 (4.3) | 0.45 | 0.31 – 0.66 | 5,961,687 | 10 (4.9) | 0.17 | 0.09 – 0.31 |
| Female | 2,899,498 | 24 (3.9) | 0.83 | 0.55 – 1.23 | 2,899,561 | 9 (4.4) | 0.31 | 0.16 – 0.60 |
| Male | 3,062,105 | 3 (0.4) | 0.10 | 0.03 – 0.30 | 3,062,126 | 1 (0.5) | 0.03 | 0.00 – 0.23 |
| 9–<12 | 5,838,248 | 112 (18.0) | 1.92 | 1.59 – 2.31 | 5,838,495 | 30 (14.8) | 0.51 | 0.36 – 0.73 |
| Female | 2,835,010 | 97 (15.6) | 3.42 | 2.80 – 4.17 | 2,835,197 | 25 (12.3) | 0.88 | 0.60 – 1.30 |
| Male | 3,003,238 | 15 (2.4) | 0.50 | 0.30 – 0.83 | 3,003,298 | 5 (2.5) | 0.17 | 0.07 – 0.40 |
| 12–<15 | 5,299,359 | 203 (32.7) | 3.83 | 3.34 – 4.40 | 5,299,917 | 63 (31.0) | 1.19 | 0.93 – 1.52 |
| Female | 2,575,048 | 168 (27.1) | 6.52 | 5.61 – 7.59 | 2,575,485 | 53 (26.1) | 2.06 | 1.57 – 2.69 |
| Male | 2,724,311 | 35 (5.6) | 1.28 | 0.92 – 1.79 | 2,724,432 | 10 (4.9) | 0.37 | 0.20 – 0.68 |
| 15–<18 | 4,219,162 | 270 (4.3) | 6.40 | 5.68 – 7.21 | 4,220,055 | 96 (47.3) | 2.27 | 1.86 – 2.78 |
| Female | 2,097,260 | 231 (3.7) | 11.01 | 9.68 – 12.53 | 2,098,016 | 81 (39.9) | 3.86 | 3.11 – 4.80 |
| Male | 2,121,902 | 39 (6.3) | 1.84 | 1.34 – 2.52 | 2,122,039 | 15 (7.9) | 0.71 | 0.43 – 1.17 |
| Race/Ethnicity | ||||||||
| African-American | 9,311,413 | 254 (40.9) | 2.73 | 2.41 – 3.08 | 9,312,092 | 81 (39.9) | 0.87 | 0.70 – 1.08 |
| Female | 4,616,319 | 213 (34.3) | 4.61 | 4.03 – 5.28 | 4,616,853 | 69 (34.0) | 1.49 | 1.18 – 1.89 |
| Male | 4,695,094 | 41 (6.6) | 0.87 | 0.64 – 1.19 | 4,695,239 | 12 (5.9) | 0.26 | 0.15 – 0.45 |
| Hispanic | 6,003,144 | 147 (23.7) | 2.45 | 2.08 – 2.88 | 6,003,611 | 51 (25.1) | 0.85 | 0.65 – 1.12 |
| Female | 2,952,782 | 129 (20.8) | 4.37 | 3.68 – 5.19 | 2,953,164 | 42 (20.7) | 1.42 | 1.05 – 1.92 |
| Male | 3,050,362 | 18 (2.9) | 0.59 | 0.37 – 0.94 | 3,050,447 | 9 (4.4) | 0.30 | 0.15 – 0.57 |
| White | 10,320,599 | 137 (22.1) | 1.33 | 1.12 – 1.57 | 10,321,012 | 31 (15.3) | 0.30 | 0.21 – 0.43 |
| Female | 5,003,994 | 116 (18.7) | 2.32 | 1.93 – 2.78 | 5,004,326 | 27 (13.3) | 0.54 | 0.37 – 0.79 |
| Male | 5,316,605 | 21 (3.4) | 0.39 | 0.26 – 0.61 | 5,316,686 | 4 (2.0) | 0.08 | 0.03 – 0.20 |
| Asian | 914,530 | 38 (6.1) | 4.16 | 3.02 – 5.71 | 914,638 | 19 (9.4) | 2.08 | 1.33 – 3.26 |
| Female | 444,067 | 32 (5.2) | 7.21 | 5.10 – 10.19 | 444,156 | 17 (8.4) | 3.83 | 2.38 – 6.16 |
| Male | 470,463 | 6 (0.9) | 1.28 | 0.57 – 2.84 | 470,482 | 2 (1.0) | 0.43 | 0.11 – 1.70 |
| Native American | 373,498 | 6 (0.9) | 1.61 | 0.72 – 3.58 | 373,519 | 6 (3.0) | 1.61 | 0.72 – 3.58 |
| Female | 182,324 | 5 (0.8) | 2.74 | 1.14 – 6.59 | 182,341 | 5 (2.5) | 2.74 | 1.14 – 6.59 |
| Male | 191,174 | 1 (0.1) | 0.52 | 0.07 – 3.71 | 191,178 | 1 (0.5) | 0.52 | 0.07 – 3.71 |
| Other | 1,084,581 | 39 (6.3) | 3.60 | 2.63 – 4.92 | 1,084,726 | 15 (7.4) | 1.38 | 0.83 – 2.29 |
| Female | 467,759 | 32 (5.2) | 6.84 | 4.84 – 9.67 | 467,878 | 11 (5.4) | 2.35 | 1.30 – 4.25 |
| Male | 616,822 | 7 (1.1) | 1.13 | 0.54 – 2.38 | 616,848 | 4 (2.0) | 0.65 | 0.24 – 1.73 |
| Geographic Region | ||||||||
| South | 9,218,017 | 208 (33.5) | 2.26 | 1.97 – 2.58 | 9,218,682 | 72 (35.5) | 0.78 | 0.62 – 0.98 |
| Northeast | 5,684,974 | 114 (18.4) | 2.01 | 1.67 – 2.41 | 5,685,320 | 41 (20.2) | 0.72 | 0.53 – 0.98 |
| Midwest | 6,501,099 | 120 (19.3) | 1.85 | 1.54 – 2.21 | 6,501,416 | 32 (15.8) | 0.49 | 0.35 – 0.70 |
| West | 6,603,676 | 179 (28.8) | 2.71 | 2.34 – 3.14 | 6,604,180 | 58 (28.6) | 0.88 | 0.68 – 1.14 |