Infants (n/214) | Toddler (n/180) | Older children (n/116) | p valuea | ||||
---|---|---|---|---|---|---|---|
n | % | n | % | n | % | ||
With chronic underlying diseases | 171 | 79.9 | 134 | 74.4 | 86 | 74.1 | 0.3384 |
Congenital abnormalities | 129 | 60.3 | 56 | 31.1 | 20 | 17.2 | <0.0001 |
Immunodeficiency and Autoimmune diseases | 18 | 8.4 | 22 | 12.2 | 14 | 12.0 | 0.3970 |
Tumour | 18 | 8.4 | 56 | 31.1 | 51 | 44.0 | <0.0001 |
Other | 6 | 2.8 | 0 | 0 | 1 | 0.9 | 0.0506 |
Without chronic underlying diseases | 43 | 20.1 | 46 | 25.6 | 30 | 25.9 | 0.3384 |