Table 5 Characteristics of children who died

N° of Subjects

45/270

17/100

χ² = 0.00413; p = 0.9488

Male/female

16/29

9/8

χ² = 1.525, p = 0.2169

Age at start of LTV (years)

2.6 (0.8–9.2)

2.3 (0.8–6.5)

p = 0.843566

 - NMDs

25/20

5/12

χ² = 3.322; p = 0.0683

 - Upper airway diseases

2/43

0/17

χ² = 0.768; p = 0.3808

 - Lower airway diseases

7/38

3/14

χ² = 0.0393; p = 0.8429

 - CNS diseases

7/38

7/10

χ² = 4.558, p = 0.0328

 - Abnormal ventilatory control

2/43

0/17

χ² = 0.768; p = 0.3808

 - Other

2/43

2/15

χ² = 1.078; p = 0.2992

Hours/day spent under mechanical ventilation (< 12/≥12)

34/11

7/10

χ² = 6.406; p = 0.0114

Home health care (yes/no)

16/29

16/1

χ² = 16.671, p < 0.0001