Table 3 Community-acquired pneumonia definition patterns of the 47 trials according to the characteristics of the trials

1

Infiltrate on chest X-ray

–

1

2

and ≥ 1 respiratory symptom

and fever

and biological inflammatory sd

2

Infiltrate on chest X-ray

3

–

–

and ≥ 1 respiratory symptom

and fever

3

Infiltrate on chest X-ray

9

–

2

and ≥ 1 respiratory symptom

4

Infiltrate on chest X-ray

5

1

2

and ≥ 2 respiratory symptoms

5

Infiltrate on chest X-ray

4

2

13

and ≥ 1 criterion / >  2 criteria among

 -fever

 -respiratory symptom

 -biological inflammatory sd

6

Fever

–

–

1

and dyspnoea / polypnoea

and new cough

and purulent sputum

and abnormal pulmonary auscultation

7

Fever

–

–

1

and new sputum

and ≥ 2 criteria among

 -dyspnoea

 -polypnoea

 -chest pain

8

Infiltrate on chest X-ray

1

–

–

and ≥ 4 criteria among

 -fever

 -respiratory symptoms