Using vaginal Group B Streptococcus colonisation in women with preterm premature rupture of membranes to guide the decision for immediate delivery: a secondary analysis of the PPROMEXIL trials

Objective To investigate whether vaginal Group B Streptococcus (GBS) colonisation or other baseline characteristics of women with preterm premature rupture of membranes (PPROM) can help in identifying subgroups of women who would benefit from immediate delivery. Design Secondary analysis of the PPRO...

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Published in:BJOG : an international journal of obstetrics and gynaecology 2014-09, Vol.121 (10), p.1263-1272
Main Authors: Tajik, P, Ham, DP, Zafarmand, MH, Hof, MHP, Morris, J, Franssen, MTM, Groot, CJM, Duvekot, JJ, Oudijk, MA, Willekes, C, Bloemenkamp, KWM, Porath, M, Woiski, M, Akerboom, BM, Sikkema, JM, Bijvank, B Nij, Mulder, ALM, Bossuyt, PM, Mol, BWJ
Format: Article
Language:English
Subjects:
Decision Making
Delivery, Obstetric
Early onset neonatal sepsis
Female
Fetal Membranes, Premature Rupture - microbiology
Fetal Membranes, Premature Rupture - therapy
group B streptococcus
Humans
Induced labor
Netherlands
Newborn babies
Pregnancy
Pregnancy Complications, Infectious - microbiology
Pregnancy Complications, Infectious - therapy
preterm premature rupture of membranes
Risk Factors
Sepsis
Streptococcal Infections - diagnosis
Streptococcus agalactiae - isolation & purification
Streptococcus infections
Treatment Outcome
treatment selection marker
Vagina - microbiology
vaginal culture
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Summary:Objective To investigate whether vaginal Group B Streptococcus (GBS) colonisation or other baseline characteristics of women with preterm premature rupture of membranes (PPROM) can help in identifying subgroups of women who would benefit from immediate delivery. Design Secondary analysis of the PPROMEXIL trials. Setting Sixty hospitals in the Netherlands. Population Women with PPROM between 34 and 37 weeks of gestation. Methods Random assignment of 723 women to immediate delivery or expectant management. Main outcome measures Early onset neonatal sepsis. Results Vaginal GBS colonisation status was the only marker which was significantly associated with the benefit of immediate delivery (P for interaction: 0.04). GBS colonisation was observed in 14% of women. The risk of early onset neonatal sepsis in GBS‐positive women was high (15.2%) when they were managed expectantly but this risk was reduced to 1.8% with immediate delivery. The early onset neonatal sepsis risk was much lower in neonates of GBS‐negative women: 2.6% after expectant management and 2.9% with immediate delivery. We estimated that by inducing labour only in GBS‐positive women, there would be a 10.4% increase in term delivery rate, while keeping neonatal sepsis and caesarean delivery rates comparable to a strategy of labour induction for all. Conclusions Our post hoc findings suggest that women with PROM between 34 and 37 weeks might benefit from immediate delivery if they have GBS vaginal colonisation, while in GBS‐negative women labour induction could be delayed until 37 weeks.
ISSN:1470-0328
1471-0528
DOI:10.1111/1471-0528.12889