Table 1 Patient characteristics stratified by age

Age (years)

4.3 (1.6, 12.1)

0.5 (0.4, 0.7)

3.1 (2.2, 5.6)

15.3 (12.4, 17.1)

N/A

Gender (male, %)

45 (46.4%)

6 (37.5%)

27 (54.0%)

12 (38.7%)

0.3

Weight (kg)

16.6 (10.0, 40.0)

6.4 (6.1, 7.4)^a,b

13.7 (10.5, 18.7)^a,c

54.2 (40.7, 68.0)^b,c

 < 0.001

Height (cm)

100 (76.0, 137.0)

63.5 (60.0, 66.4)^a,b

90 (79.5, 105.8)^a,c

153 (138.0, 164.3)^b,c

 < 0.001

BMI (kg/m²)

18.0 (15.7, 22.1)

16.5 (14.9, 18.5)^b

16.6 (15.2, 19.5)^c

22.6 (19.3, 28.5)^b,c

 < 0.001

Chronic pulmonary disease (n, %)

35 (36.1%)

4 (25%)

22 (44%)

9 (29%)

0.237

Home oxygen or NIV, or IMV (n, %)

17 (17.5%)

1 (6.2%)

16 (32.0%)^c

0 (0.0%)^c

 < 0.001

Chronic　neurological/neuromuscular disease (n, %)

37 (38.1%)

2(12.5%)

24 (48%)

11 (35.5%)

0.037