TABLE 3.

Results of Logistic Regression of Antibiotic Use

Covariate<3 Months3–11 Months
OR95% CIOR95% CI
Age, mo1.40*1.26 to 1.551.16*1.14 to 1.18
Male1.030.92 to 1.160.890.82 to 0.97
Severity
    MildReferentReferent
    Moderate1.50*1.31 to 1.721.56*1.41 to 1.74
    Severe2.78*2.14 to 3.611.43*1.16 to 1.76
Medicaid0.960.85 to 1.080.84*0.76 to 0.92
LOS1.18*1.15 to 1.221.10*1.08 to 1.13
Month
    January to FebruaryReferentReferent
    March to September1.29*1.13 to 1.460.890.80 to 0.98
    October to November0.870.71 to 1.070.790.69 to 0.92
Testing
    Chest radiograph1.110.96 to 1.281.22*1.10 to 1.36
    RSV0.900.78 to 1.040.910.81 to 1.01
    Blood culture2.67*2.32 to 3.073.39*3.04 to 3.79
    CSF culture13.76*10.14 to 18.675.02*2.57 to 9.84
    Nasopharyngeal culture1.75*1.43 to 2.161.471.16 to 1.85
    Urine culture1.98*1.68 to 2.331.48*1.26 to 1.75
Medications
    β2-agonist bronchodilators0.78*0.67 to 0.901.040.93 to 1.17
    Racemic epinephrine0.970.82 to 1.140.900.79 to 1.02
    Inhaled steroids1.040.70 to 1.540.980.83 to 1.16
    Systemic steroids0.930.77 to 1.140.860.78 to 0.96
  • Results are also adjusted for clustering by participating hospital.

  • * P < .001.

  • P < .05.

  • P < .01.