Table 3

Diagnostic characteristics of individual vital signs for identifying children with serious or intermediate infection vs those with minor/no infection

Sensitivity (95% CI)Specificity (95% CI)Positive LR (95% CI)Negative LR (95% CI)
Temperature ⩾39.0°C27 (22 to 32)87 (84 to 91)2.1 (1.5 to 2.9)0.8 (0.8 to 0.9)
Tachypnoea55 (49 to 61)57 (51 to 62)1.3 (1.1 to 1.5)0.8 (0.7 to 0.9)
Tachycardia62 (57 to 68)58 (53 to 63)1.5 (1.3 to 1.7)0.7 (0.6 to 0.8)
CRT >2 seconds8 (4 to 12)100 (99 to 100)17.7 (2.4 to 132.5)0.9 (0.9 to 1.0)
O2 sats ⩽94%19 (15 to 24)93 (90 to 95)2.7 (1.7 to 4.1)0.9 (0.8 to 0.9)
  • CRT, capillary refill time; LR, likelihood ratio; O2 sats, oxygen saturations.