Empyema n = 10

Empyema + NP n = 25

p-value

Age (year)

3.0 [0.6 to 8.1]

3.6 [0.8 to 10.2]

0.99

Gender female

2/10 (20.0%)

11/25 (44.0%)

0.26

Weight (standard deviation)

0.25 [−1.50 to 3.00]

0.25 [−1.50 to 3.00]

0.59

Past pulmonary medical history

0 (0.0%)

4/25 (16.0%)

0.30

Concomitant extra-pulmonary infection

3/10 (30.0%)

6/25 (24.0%)

0.69

Anti-pneumococcal vaccine pneumocoquevaccine = yes = 1, 2, 3

3/10 (30.0%)

11/21 (52.4%)

0.28

Symptoms

Fever

9/9 (100.0%)

24/25 (96.0%)

1

Cough

5/10 (50.0%)

20/25 (80.0%)

0.11

Dyspnea

2/10 (20.0%)

5/25 (20.0%)

1

Lethargy

9/10 (90.0%)

22/25 (88.0%)

1

Chest pain

3/10 (30.0%)

2/25 (8.0%)

0.13

Abdominal pain

4/10 (40.0%)

10/25 (40.0%)

1

Clinical features

Tachycardia

6/9 (66.7%)

15/23 (65.2%)

1

Tachypnea

10/10 (100.0%)

23/24 (95.8%)

1

Hypoventilation

7/10 (70.0%)

20/25 (80.0%)

0.66

Rales

2/10 (20.0%)

8/25 (32.0%)

0.69

Tubular sounds

4/10 (40.0%)

7/25 (28.0%)

0.69

Wheezing

2/10 (20.0%)

1/25 (4.0%)

0.19

SpO₂ < 92%

1/10 (10.0%)

2/19 (10.6%)

1