Comparison of Patients by Arthritis Type
| . | Septic . | Lyme . | Inflammatory . |
|---|---|---|---|
| N = 11 . | N = 211 . | N = 689 . | |
| n Out of N (%) . | n Out of N (%) . | n Out of N (%) . | |
| Demographics | |||
| Age in y, median (IQR) | 7 (4–11) | 8 (5–11) | 7 (4–11) |
| Male sex | 6 out of 11 (54.5) | 156 out of 211 (73.9) | 410 out of 689 (59.5) |
| Race | |||
| White | 9 out of 11 (81.8) | 168 out of 208 (80.8) | 452 out of 643 (70.3) |
| African American | 1 out of 11 (9.1) | 24 out of 208 (11.5) | 100 out of 643 (15.6) |
| Asian American | 0 out of 0 (0) | 2 out of 208 (1.0) | 24 out of 643 (3.7) |
| Hispanic | 0 out of 11 (0) | 16 out of 208 (7.8) | 87 out of 653 (13.3) |
| History | |||
| Antibiotics within 72 h | 3 out of 11 (27.3) | 42 out of 211 (19.9) | 121 out of 680 (17.8) |
| History of recent tick bite | 1 out of 11 (9.1) | 27 out of 211 (12.8) | 38 out of 688 (5.5) |
| Previous diagnosis of Lyme disease | 1 out of 11 (9.1) | 16 out of 210 (7.6) | 15 out of 639 (2.3) |
| Fever | 9 out of 11 (81.8) | 84 out of 211 (39.8) | 220 out of 687 (32.0) |
| Examination | |||
| Single joint | 11 out of 11 (100) | 209 out of 211 (99.1) | 569 out of 689 (82.6) |
| Knee involvement | 5 out of 11 (45.5) | 173 out of 211 (82.0) | 361 out of 689 (52.4) |
| Hip involvement | 3 out of 11(27.3) | 27 out of 211 (12.8) | 309 out of 689 (44.8) |
| Laboratory results, median (IQR) | |||
| WBC count, ×103 cells/mm3 | 10.9 (7.9–13.6) | 9.1 (7.7–10.8) | 9.2 (7.1–11.8) |
| ESR, mm/h | 39 (19–56) | 33 (16–51) | 13 (8–27) |
| CRP, mg/dL | 4.9 (2.1–12.7) | 2.1 (0.9–4.2) | 0.8 (0.2–2.4) |
| Management | |||
| Arthrocentesis performed | 11 out of 11 (100) | 73 out of 211 (34.6) | 59 out of 689 (8.6) |
| Joint washout | 11 out of 11 (100) | 26 out of 211 (12.3) | 31 out of 389 (4.5) |
| Hospitalized | 11 out of 11 (100) | 57 out of 211 (27.0) | 144 out of 689 (20.9) |
| . | Septic . | Lyme . | Inflammatory . |
|---|---|---|---|
| N = 11 . | N = 211 . | N = 689 . | |
| n Out of N (%) . | n Out of N (%) . | n Out of N (%) . | |
| Demographics | |||
| Age in y, median (IQR) | 7 (4–11) | 8 (5–11) | 7 (4–11) |
| Male sex | 6 out of 11 (54.5) | 156 out of 211 (73.9) | 410 out of 689 (59.5) |
| Race | |||
| White | 9 out of 11 (81.8) | 168 out of 208 (80.8) | 452 out of 643 (70.3) |
| African American | 1 out of 11 (9.1) | 24 out of 208 (11.5) | 100 out of 643 (15.6) |
| Asian American | 0 out of 0 (0) | 2 out of 208 (1.0) | 24 out of 643 (3.7) |
| Hispanic | 0 out of 11 (0) | 16 out of 208 (7.8) | 87 out of 653 (13.3) |
| History | |||
| Antibiotics within 72 h | 3 out of 11 (27.3) | 42 out of 211 (19.9) | 121 out of 680 (17.8) |
| History of recent tick bite | 1 out of 11 (9.1) | 27 out of 211 (12.8) | 38 out of 688 (5.5) |
| Previous diagnosis of Lyme disease | 1 out of 11 (9.1) | 16 out of 210 (7.6) | 15 out of 639 (2.3) |
| Fever | 9 out of 11 (81.8) | 84 out of 211 (39.8) | 220 out of 687 (32.0) |
| Examination | |||
| Single joint | 11 out of 11 (100) | 209 out of 211 (99.1) | 569 out of 689 (82.6) |
| Knee involvement | 5 out of 11 (45.5) | 173 out of 211 (82.0) | 361 out of 689 (52.4) |
| Hip involvement | 3 out of 11(27.3) | 27 out of 211 (12.8) | 309 out of 689 (44.8) |
| Laboratory results, median (IQR) | |||
| WBC count, ×103 cells/mm3 | 10.9 (7.9–13.6) | 9.1 (7.7–10.8) | 9.2 (7.1–11.8) |
| ESR, mm/h | 39 (19–56) | 33 (16–51) | 13 (8–27) |
| CRP, mg/dL | 4.9 (2.1–12.7) | 2.1 (0.9–4.2) | 0.8 (0.2–2.4) |
| Management | |||
| Arthrocentesis performed | 11 out of 11 (100) | 73 out of 211 (34.6) | 59 out of 689 (8.6) |
| Joint washout | 11 out of 11 (100) | 26 out of 211 (12.3) | 31 out of 389 (4.5) |
| Hospitalized | 11 out of 11 (100) | 57 out of 211 (27.0) | 144 out of 689 (20.9) |