In an adult study an NLR > 5 was suggested to be a more convenient marker than CRP.11 In a retrospective study in children involving patients with bacterial pneumonia and viral pneumonia, the NLR cut-off value for bacterial pneumonia diagnosis was found to be 1.7 with a sensitivity of 74.2% and specificity of 76.2%.18 These findings are different to that demonstrated by the present study. Here, CRP is linked to bacterial pneumonia.