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Table 2 Episode frequency and duration and associated hospitalization during the first two years of life

From: Frequency, duration and predictors of bronchiolitis episodes of care among infants ≥32 weeks gestation in a large integrated healthcare system: a retrospective cohort study

Gestational age, wk Infants, n Infants with at least one EOC, n Rate of at least one episode per thousand children EOCa, n Mean episode duration, d (SD) Episode consisting of ED visit and hospitalization and lasting >1 db, n (%) Episode with any hospitalization, n (%)
32–33 1,649 406 246.2 523 4.4 (5.5) 37 (14.2) 101 (19.3)
34–36 7,969 1,622 203.5 2,003 3.9 (5.0) 72 (7.8) 254 (12.7)
37 7,855 1,400 178.2 1,681 3.4 (4.6) 44 (6.4) 151 (9.0)
38–40 86,708 13,701 158.0 16,172 3.3 (4.7) 396 (6.3) 1,288 (8.0)
≥41 19,083 2,839 148.8 3,369 3.2 (4.7) 70 (5.6) 242 (7.2)
Total 123,264 19,968 162.0 23,748 3.2 (4.7) 619 (6.6) 2,036 (8.6)
  1. ED = emergency department. EOC = Episode of Care.
  2. aAcross episodes during the first two years of life, there were a total of 35,703 outpatient visits for a rate of 289 per 1000 children, a total of 1909 emergency department visits for a rate of 15 per 1000 children and 2169 hospitalizations for a rate of 17.5 per 1000 children.
  3. bDenominator is among episodes >1 day for each gestational age cohort.