Table 1.

The list of known predictors of hospital admission for ED patients with bronchiolitis recorded at Intermountain Healthcare facilities.

Category	Predictors
The known predictors that are consistently recorded at Intermountain Healthcare facilities and available as structured attributes in our data sets	SpO2, heart rate, respiratory rate, temperature, age, gender, prior hospitalization, prior intubation, abnormal chest x-ray, low dew point (from the environmental variable data set), rhinovirus infection, coinfection, dehydration, history of bronchopulmonary dysplasia, history of eczema, prematurity, maternal/passive smoking
The known predictor that is rarely recorded as structured attributes at Intermountain Healthcare facilities	enterovirus infection
The known predictors that are inconsistently recorded in clinical notes at Intermountain Healthcare facilities	increased work of breathing, poor feedings, decreased feeding, breastfed, abnormalities on auscultation, retractions, family history of atopy, fewer albuterol in the first hour