Table 3.
Clinical characteristics of blood culture–negative endocarditis patients based on suspicion of Q fever (from 2006 to 2012)
| Characteristics | Patients suspected of Q fever (n = 11) | Patients not suspected of Q fever (n = 136) | χ2 | P |
|---|---|---|---|---|
| Q fever risk factors, n (%) | ||||
| Valvulopathy | 8 (55) | 96 (71) | 0.02 | 0.88 |
| Fever without leukocytosis | 7 (73) | 79 (58) | 0.13 | 0.72 |
| Immunocompromised | 1 (64) | 23 (17) | 0.46 | 0.50 |
| Perivalvular leak | 3 (27) | 8 (6) | 6.73 | 0.01 |
| Number of risk factors present (%) | ||||
| ≤1 | 5 (45) | 62 (46) | 0.00 | 0.99 |
| ≥2 | 6 (55) | 74 (54) | ||
| Contact with infectious disease division and guideline adherence, n (%) | 11 (100) | 86 (63) | 4.6 | 0.03 |