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TABLE 2

Comparison of Patients by Arthritis Type

SepticLymeInflammatory
N = 11N = 211N = 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) 
SepticLymeInflammatory
N = 11N = 211N = 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) 
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