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. 2004 Nov;145(5):641-5.
doi: 10.1016/j.jpeds.2004.06.072.

Oxygen saturation as a predictor of prolonged, frequent bronchodilator therapy in children with acute asthma

Sanjay V Mehta  1 , Patricia C Parkin, Derek Stephens, Kelly A Keogh, Suzanne Schuh
Affiliations

Oxygen saturation as a predictor of prolonged, frequent bronchodilator therapy in children with acute asthma

Sanjay V Mehta et al. J Pediatr. 2004 Nov.

Erratum in

  • J Pediatr. 2004 Dec;145(6):864

Abstract

Objectives: To examine if the initial oxygen saturation (SaO2) in the Emergency Department is a useful predictor of prolonged frequent bronchodilator therapy (FBT) in children with acute asthma.

Study design: Prospective cohort study of 273 children, 1 to 17 years of age, requiring systemic corticosteroids. Patients were categorized as needing FBT for >4 hours (n=166) versus >4 hours (n=107) and >12 hours (n=79) versus >12 hours (n=194). Multiple logistic regression determined the association between SaO2 and these outcomes.

Results: Baseline SaO2 remains a significant independent predictor of FBT for >4 hours (OR=0.81) and >12 hours (OR=0.84); 91% of patients with SaO2 of 90% to 91% had FBT >4 hours and 80% of patients with SaO2 of < or =89% had FBT >12 hours. Children with SaO2 of < or =91% are 14.7 and 12.0 times more likely to require FBT for >4 hours and >12 hours, respectively, than those with SaO2 of 98% to 100%. The interval likelihood ratios for FBT >4 hours were 12.3 for SaO2 of < or =89%, 6.5 for 90% to 91%, but only 1.8 for 92% to 93%. The likelihood ratios for FBT >12 hours decreased from 9.8 for SaO2 of < or =89% to 3.5 for SaO2 of 90% to 91%.

Conclusions: SaO2 is a useful predictor of FBT >4 hours if it is < or =91% and of FBT >12 hours if it is < or =89%.

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