ClinicalTrials.gg
CompletedNCT02874443REDUCEDUpdated Dec 15, 2025

The REDUCED Trial: REDucing the Utilization of CEsarean Sections for Dystocia

An interventional study of Knowledge Translation of labor management guidelines in Cesarean Section, Dystocia, sponsored by University of Calgary. Completed at 1 site in Canada. Open to female participants. Per ClinicalTrials.gov, last updated 2025-12-15.

Sponsored by University of Calgary · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
88,918
Allocation
Randomized
Sex
Female
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Study summary

This project is a clustered randomized controlled trial of a knowledge translation intervention of new ACOG guidelines for the diagnosis of poor progress in labor. The intent is to reduce the rate of cesarean section (CS) in first time mothers at term (>= 37 weeks), with a vertex presenting singleton fetus, without increasing maternal or neonatal morbidity. The guidelines were developed from data from the Consortium for Safe Labor. The unit of randomization will be sites in Alberta that deliver

Read the detailed description

Cluster randomized controlled trial of a knowledge translation intervention of new guidelines for the diagnosis of poor progress in labor. The intervention will be randomized to centres (the clusters) in Alberta that provide intrapartum care, have facilities to perform cesarean section and deliver at least 70 primparous women annually, with stratification based on facility type and geographic location. Clustering by centre and not individual caregivers (nurses/physicians) is necessary to prevent leakage or crossover of the intervention to controls. As all participating centres will eventually receive the intervention, the biostatistician will generate a randomization into two "waves". The intervention will be introduced sequentially by strata (Calgary, Edmonton, regional centres, rural centres) to the first "wave" hospitals in multi-week run-in periods after which those strata will be revisited for roll-out to the second "wave" hospitals.

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Conditions studied

  • Cesarean Section, Dystocia

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03

In context

Dystocia

55 studies on the registry are indexed under Dystocia; 12 are open to participants now.

This study's enrollment of 88,918 is above the median of 200 across 42 interventional studies indexed under Dystocia.

Browse Dystocia studies →

Lead sponsor

University of Calgary is the lead sponsor of 703 studies on the registry; 196 are open to participants now.

Of its 10 completed or terminated interventional studies of FDA-regulated products, 2 (20%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
Female
Accepts healthy volunteers
No

Inclusion criteria

  • Centers in Alberta that provide intrapartum care, have facilities to perform cesarean section and deliver at least 70 primparous women annually

Exclusion criteria

Exclusion Criteria:

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Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
88,918 participants (actual)

Study arms

  • Experimental
    Intervention centers

    Application of a knowledge translation strategy, of new clinical practice guidelines on labor management, to physicians and nurses caring for women in labor. Intervention centers will receive knowledge translation of labor management guidelines

    Other: Knowledge Translation of labor management guidelines

  • No intervention
    Control centers

    No intervention at control centers

Interventions

  • OtherKnowledge Translation of labor management guidelines
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What researchers measure

Primary outcomes

  1. Rate of Cesarean section

    Rate of Cesarean section in primiparous women in labor, at term (\>= 37 weeks), with a vertex presenting singleton fetus

    Time frame: at delivery

Secondary outcomes

  1. Rate of perinatal death

    Rate of perinatal death for primiparous women in labor, at term (\>= 37 weeks), with a vertex presenting singleton fetus

    Time frame: at delivery

  2. Rate of neonatal asphyxia

    Neonatal asphyxia is defined as intrapartum stillbirth or neonatal death from asphyxia (Perinatal Society of Australia and New Zealand coding) or Neonatal Intensive Care Unit admission and at least two of: a. Apgar score of ≤5 at 10 minutes; b. Mechanical ventilation or chest compressions for resuscitation within 10 minutes; c. Cord pH \< 7.00 (venous or arterial), or arterial base excess ≥ 12 at birth. Rate of neonatal asphyxia for deliveries involving primiparous women in labor, at term (\>= 37 weeks), with a vertex presenting singleton fetus

    Time frame: at delivery

  3. Rate of moderate or severe asphyxia or meets criteria for therapeutic cooling

    Rate of moderate or severe asphyxia or meets criteria for therapeutic cooling for deliveries involving primiparous women in labor, at term (\>= 37 weeks), with a vertex presenting singleton fetus

    Time frame: at delivery

  4. Rate of neonatal sepsis or suspected sepsis

    Rate of neonatal sepsis or suspected sepsis for deliveries involving primiparous women in labor, at term (\>= 37 weeks), with a vertex presenting singleton fetus

    Time frame: at delivery

  5. Rate of post partum hemorrhage

    Rate of post partum hemorrhage for primiparous women in labor, at term (\>= 37 weeks), with a vertex presenting singleton fetus

    Time frame: at delivery

  6. Rate of blood transfusion

    Rate of blood transfusion for primiparous women in labor, at term (\>= 37 weeks), with a vertex presenting singleton fetus

    Time frame: at delivery

  7. Rate of postpartum uterine artery/pelvic artery embolization

    Rate of postpartum uterine artery/pelvic artery embolization for primiparous women in labor, at term (\>= 37 weeks), with a vertex presenting singleton fetus

    Time frame: Within 30 days of delivery

  8. Rate of postpartum hysterectomy

    Rate of postpartum hysterectomy for primiparous women in labor, at term (\>= 37 weeks), with a vertex presenting singleton fetus

    Time frame: Within 30 days of delivery

  9. Rate of postpartum maternal intensive care unit (ICU) admission

    Rate of postpartum maternal intensive care unit (ICU) admission for primiparous women in labor, at term (\>= 37 weeks), with a vertex presenting singleton fetus

    Time frame: at delivery

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Study locations

1 site
  • University of Calgary
    Calgary, Alberta T2N 2T9, Canada
08

References and documents

Publications

  • Wood S, Skiffington J, Brant R, Crawford S, Hicks M, Mohammad K, Mrklas KJ, Tang S, Metcalfe A; REDUCED Trial Team. The REDUCED trial: a cluster randomized trial for REDucing the utilization of CEsarean delivery for dystocia. Am J Obstet Gynecol. 2023 May;228(5S):S1095-S1103. doi: 10.1016/j.ajog.2022.10.038. Epub 2023 Mar 16. PubMed 37164490 ↗

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

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Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Oct 2016 to primary completion in Feb 2020, 40 months.

Of 18 interventional studies with no phase under Dystocia, half reached primary completion within 23 months of starting (the median), counting those still running; a quarter within 18 and three quarters within 40. This study's 40 months is above that.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 17, 2016
First posted
Aug 22, 2016
StartActual
Oct 2016
Primary completionActual
Feb 28, 2020
CompletionActual
Mar 30, 2020
Last update
Dec 15, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Dec 15, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT02874443
Responsible party
Stephen Wood (Professor, University of Calgary) — Principal investigator
First posted
Aug 22, 2016
Start date
Oct 2016
Primary completion
Feb 28, 2020
Completion
Mar 30, 2020
Last update
Dec 15, 2025

Study contacts

Stephen Wood, MD MSc
principal investigator · University of Calgary

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Dec 2025. You cannot join it, but the record below documents what was studied.

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