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Table 4 Comparing P value of associated clinical, laboratory, and radiographic findings among positive versus negative pertussis and mycoplasma cases

From: The use of multiplex PCR for the detection of atypical pathogens in Egyptian children with CAP: a high rate of Bordetella pertussis in early infancy

Variables Pertussis-positive versus pertussis-negative cases Mycoplasma-positive versus mycoplasma-negative cases
Prolonged cough > 14 days ≤ 0.001* > 0.999
Upper respiratory symptoms 0.001* 0.13
Chest indrawing 0.04* > 0.999
Rhonchi 0.04* > 0.999
Grunting 0.36 > 0.999
Cyanosis 0.6 > 0.999
Refusal of feeding 0.11 0.57
Vomiting 0.001* 0.57
Lethargy 0.61 > 0.999
Convulsion 1.0 > 0.999
Severe pneumonia 0.1 0.5
ICU admission 0.6 > 0.999
Incomplete vaccination 0.007* 0.12
Radiological findings
 Unilateral affection 0.7 0.03*
 Bilateral affection   
Number of involved lobes
 1 lobe 0.08 0.29
 2 lobes or more   
Alveolar consolidation 1.0 > 0.999
Interstitial infiltration 0.001* 0.01*
Total leukocytic count
 Leukocytosis > 15,000 0.07 0.58
 Lymphocytosis 0.05 0.5
  1. *P values < 0.05 is statistically significant