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Table 1 Clinical characteristics in patients with Mycoplasma pneumoniae pneumonia and Streptococcus pneumoniae pneumonia on admission*

From: Radiographic features of Mycoplasma pneumoniaepneumonia: differential diagnosis and performance timing

Characteristics M. pneumoniae S. pneumoniae p value
Number 64 68  
Mean age (range), years 36.6 (18–69) 61.8 (19–86) <0.0001
Male: Female 34: 30 42: 26 0.3791
Co-morbid illness 15 (23) 33 (48) <0.0001
PSI risk classes**    
   I – III 41 (64) 29 (43) 0.0154
   IV 23 (36) 39 (57)  
   V 0 0  
WBC mean (/μL) 7,400 13,800 <0.0001
  1. *Data represent the numbers of patients, and numbers in parentheses are percentages.
  2. **PSI, pneumonia severity index.