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Table 5 Negative binomial regression of maternal hospital length of stay

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 1.00 0.93 – 1.08 0.935
BMI > 35 1.05 0.99 – 1.11 0.08
Age > 35 years 1.00 0.94 – 1.07 0.967
Twin pregnancy 2.09 1.78 – 2.45  < 0.001*
Tobacco use 1.00 0.94 – 1.05 0.862
  1. *Statistical significance was set at p < 0.05, n = 3630. BMI body mass index, PcnA penicillin allergy. Maternal hospital length of stay was adjusted for BMI, age, twin pregnancy, and tobacco use in the regression analyses