Table 1 Characteristics of the studied population

Study period, years

2018–2021

Admission due to bronchiolitis, n

4,396

Admission due to RSV related bronchiolitis, n (%)

3,108 (71)

Children admitted due to bronchiolitis, n

4,282

Mean age on admission, days

99.4 ± 64.9

Age classes, n of admission (%)

- 0–28 days

- 29–90 days

- 91–365 days

694 (16)

1899 (43)

1803 (41)