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Table 3 Negative binomial regression of days on antibiotics for hospitalized patients

From: Outcomes in reported penicillin allergic mothers and neonates requiring Group B streptococcal prophylaxis: a retrospective observational cohort study

Predictors Incidence Rate Ratios 95% CI p-value
PcnA label 0.45 0.38 – 0.53  < 0.001*
BMI > 35 1.10 0.90 – 1.34 0.355
Age > 35 years 1.04 0.83 – 1.30 0.749
Twin pregnancy 1.38 0.94 – 2.01 0.099
Tobacco use 0.83 0.68 – 1.00 0.055
  1. *Statistical significance was set at p < 0.05, n = 440,440. BMI body mass index, PcnA penicillin allergy. Days on antibiotics were adjusted for BMI, age, twin pregnancy, and tobacco use in the regression analyses