Table 1

Description of the children hospitalised for severe bronchiolitis according to the profiles (A to D) identified by LCA, for the clinical characteristics introduced in the LCA model, MARC-30 USA, n=2207

A (12%)B (36%)C (34%)D (17%)
History of wheezing2348211912
History of eczema143215107
Wheeze at ED presentation6490826311
Cough at ED presentation8692938374
Retractions at ED presentation
 Moderate to severe313524505
Hospital length of stay (days)
Retractions during hospital stay
 Moderate to severe209<152<1
Viral aetiology
  • Results are expressed as % (observed proportion in the study population (‘All’), and probability of individuals presenting the characteristics within profiles A to D).

  • Profile A: history of wheezing/eczema, wheezing at ED presentation, more often rhinovirus. Profile B: wheezing at ED presentation, more often RSV only. Profile C: most severe. Profile D: non-wheezing at ED presentation, least severe.

  • ED, emergency department; LCA, latent class analysis; RSV, respiratory syncytial virus.