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. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: J Allergy Clin Immunol Pract. 2014 Nov 25;3(2):228–235. doi: 10.1016/j.jaip.2014.09.017

Table IV.

Reduced-form Asthma Prediction Rule models, odds ratios for associations of predictor variables with primary outcome of need for hospitalization and secondary outcome of hospitalization decision of the clinical team in 928 participants aged 5 - 17 years with asthma exacerbations

Need for
hospitalization		 Hospitalization
decision of the
clinical team
Age (change from 6.9 to 11 years) 1.5 (1.0 – 2.1) 1.6 (1.2 – 2.2)
BMI (Kg/M2,change from 16 to 22) NA 0.7 (0.5 – 1.1)
Female gender 1.44 (1.0 – 2.1) NA
SpO2 (%, change from 98 to 94%) 2.8 (2.1 – 3.6) 4.4 (3.3 - 5.7)
Need for albuterol > 2/wk 1.3 (0.9 – 1.9) NA
Intercostal muscle retractions NA 1.6 (1.0 – 2.6)
Inspiratory:Expiratory ratio (≤ 1:3 vs. 1:1) 4.4 (2.3 – 8.61) 2.9 (1.3 – 6.5)
Wheezing (inspiratory + expiratory vs. none) NA 2.9 (1.4 – 5.6)

Age and BMI included as flexible smooth variables using restricted cubic splines.

BMI = Body mass index; SpO2 = oxygen saturation on room air; NA = not included in this model (P > 0.25)

Values are odd ratios (95% CI) estimated using logistic regression.