TABLE 3.

Likelihood Ratios for Meningitis of Neurologic Symptoms and Signs

No MeningitisMeningitisCrude Likelihood RatioALR
Neck stiffness
    Absent4446600.660.74
    Present403138.213.3
Bulging fontanelle
    Absent4472750.830.88
    Present141656.314.9
Conscious level
    Normal3245250.380.74
    Lethargic603120.980.99
    Agitated14561.961.22
    Impaired consciousness498484.761.60
Inability to feed
    Absent3998450.55
    Present493464.60
History of seizures
    None3338340.500.78
    Seizures within febrile convulsions age range1035281.341.18
    Seizures outside febrile convulsions age range1182912.13.94
    No seizures3338340.50
    ≥3 seizures in 24 h842372.17
311203.17
    No seizures3338340.500.76
    Generalized seizures851261.511.18
    Partial seizures302315.071.91
  • — indicates that the sign was not potentially clinically useful (ALR >0.67 and <1.5).