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

Table 5 Negative binomial regression of maternal hospital length of stay

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

^*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

ISSN: 1471-2431