Table 4

Pretest and post-test probabilities of meningitis

Pre-test probability of meningitis in children with acute illness (%)Clinical examination
finding
Post-test probability of meningitis (%)
AbsentNuchal rigidity0.200
Kernig’s sign0.200
Brudzinski’s sign0.170
0.308PresentNuchal rigidity0.640
Kernig’s sign0.609
Brudzinski’s sign0.527
  • A summary of pretest and post-test probability of meningitis (bacterial and viral) according to clinical examination findings.

  • Pretest probability derived from ref 3. Post-test probabilities calculated using likelihood ratios from ref 2.