Japanese Respiratory Society Score for Mycoplasma pneumoniae Pneumonia

The Japanese Respiratory Society (JRS) reported a simple score to screen a patient for Mycoplasma pneumoniae pneumonia.

Patient selection: pneumonia

Parameters:

(1) age in years

(2) comorbid conditions

(3) stubborn cough

(4) adverse findings on chest auscultation

(5) sputum AND rapid diagnostic tests

(6) white blood cell count

Parameter	Finding	Points
age in years	< 60	1
	>= 60	0
comorbid conditions	none or only minor	1
	present	0
stubborn cough	absent	0
	present	1
adverse findings on chest auscultation	absent	0
	present	1
sputum and rapid testing	both absent	1
	one or both present	0
WBC count	< 10,000 per µL	1
	>= 10,000 per µL	0

where:

• Identifying a respiratory pathogen on rapid testing might be sufficient to make the diagnosis unlikely.

score =

= SUM(points for all 6 parameters)

Interpretation:

• minimum score: 0

• maximum score: 6

• A score >= 4 indicates that mycoplasma pneumonia is likely.

• A score <= 3 indicates that mycoplasma pneumonia is unlikely.

To read more or access our algorithms and calculators, please log in or register.