It call be challenging to determine which findings are associated with foca
l infiltrates in young wheezing children. A prospective study of wheezing c
hildren less than or equal to 18 months of age revealed focal infiltrates o
n chest radiograph in 23%. By use of multivariate analysis, findings signif
icantly associated with focal infiltrates included grunting (OR 4.1, 95% CI
, 2.0, 8.6) and oxygen saturation less than or equal to 93% (OR 2.2, 95% CI
, 1.1, 4.8); with a sensitivity and specificity of 12.5% and 97%, respectiv
ely Variables not associated with focal infiltrates included first-time whe
ezing, fever; and tachypnea. The combination of grunting and oxygen saturat
ion less than or equal to 93% is highly specific and can be used to help di
agnose pneumonia in wheezing infants and toddlers.