Corticosteroid dose and risk for progression from PIV-3 URI to pneumonia.

Higher doses of steroids at the time of PIV-3 URI diagnosis were associated with increased risk for progression to PIV-3 LRI, both among allogeneic and autologous transplant recipients. No autologous transplant recipient received steroids in excess of 2 mg/kg per day. None, ■; < 1 mg/kg/d,░; 1-2 mg/kg/d, ▪; > 2 mg/kg/d, ▤.