Logistic regression analysis with selected explanatory clinical and laboratory variables from table 2
| Explanatory variable | p value | Adjusted odds ratio | 95% CI |
| Skin haemorrhages, type C, D, or E (fig 1) | 0.002 | 11.2 | 2.5 to 50.7 |
| Universal distribution of skin haemorrhages | 0.036 | 5.1 | 1.1 to 23.7 |
| Maximum diameter of skin haemorrhages >2 mm | 0.012 | 7.0 | 1.5 to 32.0 |
| General condition, score <7 | 0.001 | 14.0 | 3.1 to 62.6 |
| Nuchal rigidity | 0.040 | 6.9 | 1.1 to 44.0 |
| Neutrophil band forms >0.5 × 109/l | 0.002 | 38.3 | 3.8 to 385.1 |
| CRP >68 mg/l4-150 | 0.0001 | 12.4 | 4.7 to 32.7 |
The response variable is presence or absence of meningococcal disease.
The two regression analyses—of the clinical and the laboratory variables—were separate.
↵4-150 68 mg/l equals 500 nmol/l. The logistic regression analysis was repeated with 136 mg/l as cut off point; the results were similar.