Study protocol: Quantitative fibronectin to help decision-making in women with symptoms of preterm labour (QUIDS) part 2, UK Prospective Cohort Study

Sarah Jane Stock, Lisa M. Wotherspoon, Kathleen Anne Boyd, Rachel K. Morris, Jon Dorling, Lesley Jackson, Manju Chandiramani, Anna L. David, Asma Khalil, Andrew Shennan, Victoria Hodgetts Morton, Tina Lavender, Khalid Khan, Susan Harper-Clarke, Ben Mol, Richard D. Riley, John Norrie, Jane Norman

Research output: Contribution to journalArticleOtherpeer-review

4 Citations (Scopus)


Introduction The aim of the QUIDS study is to develop a decision support tool for the management of women with symptoms and signs of preterm labour, based on a validated prognostic model using quantitative fetal fibronectin (fFN) concentration, in combination with clinical risk factors. Methods and analysis The study will evaluate the Rapid fFN 10Q System (Hologic, Marlborough, Massachusetts, USA) which quantifies fFN in a vaginal swab. In QUIDS part 2, we will perform a prospective cohort study in at least eight UK consultant-led maternity units, in women with symptoms of preterm labour at 22 +0 to 34 +6 weeks gestation to externally validate a prognostic model developed in QUIDS part 1. The effects of quantitative fFN on anxiety will be assessed, and acceptability of the test and prognostic model will be evaluated in a subgroup of women and clinicians (n=30). The sample size is 1600 women (with estimated 96-192 events of preterm delivery within 7 days of testing). Clinicians will be informed of the qualitative fFN result (positive/negative) but be blinded to quantitative fFN result. Research midwives will collect outcome data from the maternal and neonatal clinical records. The final validated prognostic model will be presented as a mobile or web-based application. Ethics and dissemination The study is funded by the National Institute of Healthcare Research Health Technology Assessment (HTA 14/32/01). It has been approved by the West of Scotland Research Ethics Committee (16/WS/0068).

Original languageEnglish
Article numbere020795
Number of pages10
JournalBMJ Open
Issue number4
Publication statusPublished - 1 Apr 2018


  • cervix
  • diagnostic test
  • fetal fibronectin
  • pregnancy
  • preterm birth

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