Outcomes of Cesarean Section vs Vaginal Delivery: Instrumental Variable Adjusted Analysis
Substantial Variability Between Traditional and Instrumental Variable Estimates of the Risk of Caesarean Section in Canada: a Population-based Cohort Study
1 other identifier
observational
1,703,590
0 countries
N/A
Brief Summary
This study will examine the effect of cesarean section on perinatal mortality, using data provided by the Canadian Institute for Health Information.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for all trials
Started May 2011
Longer than P75 for all trials
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
Study Start
First participant enrolled
May 1, 2011
CompletedPrimary Completion
Last participant's last visit for primary outcome
July 1, 2013
CompletedStudy Completion
Last participant's last visit for all outcomes
July 1, 2015
CompletedFirst Submitted
Initial submission to the registry
August 4, 2016
CompletedFirst Posted
Study publicly available on registry
August 15, 2016
CompletedAugust 15, 2016
August 1, 2016
2.2 years
August 4, 2016
August 12, 2016
Conditions
Outcome Measures
Primary Outcomes (1)
Perinatal Mortality
Includes deaths at any age if infant continuously hospitalized (including transfers) in an acute care facility. Includes deaths up to 7 days of age if infant discharged from hospital then readmitted prior to 7 days of age.
up to 7 days
Study Arms (2)
Cesarean
Mothers delivered by cesarean section
Vaginal
Mothers delivered by vaginal delivery
Interventions
Eligibility Criteria
All obstetrical deliveries in Canada (except the province of Quebec) between April 1, 2006 and March 31, 2009
You may qualify if:
- Mothers living in Canada and their infants delivering within the study period at Canadian hospitals outside of the province of Quebec.
You may not qualify if:
- Maternal record not linkable to neonatal record.
- Multiple gestation.
- Birthweight \< 500 gm.
- Gestational age at delivery \< 20 weeks.
- Deliveries at hospitals with less than 20 cesarean deliveries during study period.
- Records with missing data for important covariates
Contact the study team to confirm eligibility.
Sponsors & Collaborators
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Intervention Hierarchy (Ancestors)
Study Officials
- PRINCIPAL INVESTIGATOR
Kris Aubrey-Bassler, MD
Memorial University
Study Design
- Study Type
- observational
- Observational Model
- COHORT
- Time Perspective
- RETROSPECTIVE
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Director, Primary Healthcare Research Unit
Study Record Dates
First Submitted
August 4, 2016
First Posted
August 15, 2016
Study Start
May 1, 2011
Primary Completion
July 1, 2013
Study Completion
July 1, 2015
Last Updated
August 15, 2016
Record last verified: 2016-08
Data Sharing
- IPD Sharing
- Will not share
The data provider does not allow sharing of investigator data, but data can be requested directly from them.