title: Predictors of respiratory failure among previously healthy children with respiratory syncytial virus infection.
abstract: BACKGROUND
  Respiratory syncytial virus (RSV)-related disease is the leading cause of hospitalization among infants, with approximately 7% to 21% of these patients developing acute respiratory failure.
  
  
  OBJECTIVE
  The aim of this study was to identify clinical variables at initial presentation in the emergency department (ED) that may predict the subsequent need for mechanical ventilation among previously healthy, RSV-infected children who require pediatric intensive care unit (PICU) hospitalization.
  
  
  METHODS
  This is a retrospective study of 67 previously healthy, RSV-infected patients admitted from January 1997 to March 2000 to the PICU. The primary outcome for this study was the need for mechanical ventilation. The relationship between clinical variables at initial ED presentation and the need for mechanical ventilation were explored using univariate and multiple logistic regression analysis.
  
  
  RESULTS
  On multivariate analysis, the presence of lethargy (odds ratio [OR], 12.2; P = .005), grunting (OR, 9.3; P = .01), and a Paco(2) 65 mm Hg or greater (OR, 11.8; P = .013) were clinical factors at initial presentation in the ED associated with the subsequent need for mechanical ventilation among the study cohort. A developmental model that included lethargy, grunting, and a Paco(2) of 65 mm Hg or greater performed well as a prediction model. The developmental model had a sensitivity of 71%, specificity of 96%, a positive predictive value of 86%, and a negative predictive value of 91%.
  
  
  CONCLUSIONS
  The presence of lethargy, grunting, and a Paco(2) of 65 mm Hg or greater at initial presentation in the ED were predictive for the subsequent need for mechanical ventilation in previously healthy, RSV-infected children admitted to the PICU.
authors.affiliation: College of Medicine-University, Arkansas Medical Sciences, Little Rock, AR 72202, USA.
authors.forename: Parthak
authors.initials: P
authors.lastname: Prodhan
authors.forename: Sarit
authors.initials: S
authors.lastname: Sharoor-Karni
authors.forename: James
authors.initials: J
authors.lastname: Lin
authors.forename: Natan
authors.initials: N
authors.lastname: Noviski
mesh_terms: D000704:Analysis of Variance; D001900:Boston; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D015278:Intensive Care Units, Pediatric; D008297:Male; D011379:Prognosis; D012121:Respiration, Artificial; D012131:Respiratory Insufficiency / Q000628:therapy / Q000821:virology*; D018357:Respiratory Syncytial Virus Infections / Q000150:complications* / Q000175:diagnosis; D012189:Retrospective Studies; D012720:Severity of Illness Index