Investigations
| Investigation | Non-meningococcal | Meningococcal | Odds ratio | |
|---|---|---|---|---|
| (% done) | (n = 194) | (n = 24) | (95% CI) | |
| Total white cell count (×109/l) (97%) | ||||
| Normal (4–11) | 104 (91%) | 10 (9%) | ||
| Abnormal | 83 (86%) | 14 (14%) | 1.8 (0.74 to 4.2) | |
| Neutrophils (×109/l) (97%) | ||||
| Normal (2–7.5) | 116 (93%) | 9 (7%) | ||
| Abnormal | 71 (83%) | 15 (17%) | 2.7 (1.1 to 6.5) | |
| Platelet count (×109/l) (93%) | ||||
| Normal (>150) | 165 (90%) | 18 (10%) | ||
| Abnormal | 14 (70%) | 6 (30%) | 3.9 (1.3 to 11.5) | |
| INR (83%) | ||||
| Normal (<1.2) | 150 (94%) | 10 (6%) | ||
| Prolonged | 7 (33%) | 14 (67%) | 30.0 (9.9 to 91.0) | |
| APTTR (83%) | ||||
| Normal (<1.18) | 156 (88%) | 22 (12%) | ||
| Prolonged | 1 (33%) | 2 (67%) | 14.2 (1.2 to 163.0) | |
| CRP (mg/l) (84%) | ||||
| <6 | 90 (100%) | 0 (0%) | 0 (0–3%) | |
| 6–99 | 70 (89%) | 9 (11%) | ||
| >99 | 6 (43%) | 8 (57%) | ||