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Table 5 Mean values of the variables included in the matching process, before and after the latter was performed.

From: Pre-hospital antibiotic treatment and mortality caused by invasive meningococcal disease, adjusting for indication bias

Variable Mean value
(treated patients) before matching
Mean value
(non-treated patients) before matching
Mean value
(treated patients) after matching
Mean value
(non-treated patients) after matching
Age (years) 9.6 10.2 9.6 9.5
Fever 0.05 0.04 0.04 0.04
Nausea/Vomiting 0.54 0.62 0.54 0.55
Petechiae 0.16 0.25 0.16 0.16
Headache 0.88 0.86 0.88 0.88
Reduced LC 0.59 0.86 0.59 0.58
Cold-like symptoms 0.97 0.92 0.96 0.96
Pharyngoamygdalitis 0.83 0.86 0.83 0.80
Arthralgia 0.70 0.92 0.70 0.78
Neck stiffness 0.87 0.93 0.86 0.84
Irritability 0.96 0.95 0.96 0.95
Convulsions 0.55 0.47 0.55 0.56
STI (hours) 38.55 26.62 38.5 35.8
  1. LC: Level of consciousness; STI: Symptom-treatment interval.