Table 3
Proportions of cases with high likelihood ratios
| Analysis of derivation set (n = 2049) | Cutoff value for LR >5 | Cutoff value for LR >10 | LR >5 n = % | LR >5% | LR >10 n = % | LR <10% |
|---|---|---|---|---|---|---|
| This table shows the proportion of blood cultured cases in the validation set in which likelihood ratios of 5 and 10 for bacteraemia are predicted by the two models derived here, and by neutrophil count, lymphocyte count, and CRP protein when used as single variables. | ||||||
| CRP, C reactive protein; LR, likelihood ratio. | ||||||
| Modelled probability, CRP included | 0.197 | 0.304 | 168 | 8.2% | 57 | 2.8% |
| Modelled probability, CRP excluded | 0.181 | 0.250 | 156 | 7.6% | 53 | 2.6% |
| Neutrophil count (×109/l) | 20.7 | 26.2 | 92 | 4.5% | 39 | 1.9% |
| Lymphocyte count (×109/l) | 0.263 | 0.149 | 70 | 3.4% | 23 | 1.1% |
| CRP (mg/l) | – | – | 0 | 0.0% | 0 | 0.0% |
