Discriminative value of Shock Index (continuous) for serious illness, stratified for age n=5622
| SBI | IBI | ILSI | ICU admission | |
| AUC (95% CI) | AUC (95% CI) | AUC (95% CI) | AUC (95% CI) | |
| Shock Index (continuous) stratified for age | ||||
| <1 year, n=801 | 0.66 (0.60 to 0.72) | 0.71 (0.56 to 0.85) | 0.70 (0.60 to 0.80) | 0.73 (0.59 to 0.87) |
| 1–5 years, n=2395 | 0.54 (0.49 to 0.59) | 0.56 (0.42 to 0.70) | 0.57 (0.51 to 0.64) | 0.58 (0.47 to 0.68) |
| 5–10 years, n=1330 | 0.56 (0.50 to 0.62) | 0.68 (0.50 to 0.86) | 0.61 (0.52 to 0.69) | 0.52 (0.36 to 0.69) |
| >10 years, n=1096 | 0.55 (0.50 to 0.60) | 0.74 (0.63 to 0.85) | 0.71 (0.64 to 0.79) | 0.72 (0.45 to 0.98) |
AUC, area under the curve; IBI, invasive bacterial infection; ICU, intensive care unit; ILSI, immediate life-saving intervention; SBI, serious bacterial infection.