We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu

Multiple Courses of Antenatal Corticosteroids for Preterm Birth Study (MACS)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT00187382
Recruitment Status : Completed
First Posted : September 16, 2005
Last Update Posted : June 15, 2010
Information provided by:
Sunnybrook Health Sciences Centre

Brief Summary:
In women at 26 to 30 weeks gestation and who are risk for threatened early birth, who have not had their baby by 14 or more days after being given a single course of antenatal corticosteroids (ACS), do repeated courses of ACS every 14 days until 33 weeks' gestational age lower the risk of illness or death in babies compared to repeated courses of placebo. Children are assessed at 2 years and 5 years for neurodevelopmental impairment.

Condition or disease Intervention/treatment Phase
Pregnancies at Increased Risk of Preterm Birth Drug: Multiple vs. single courses of antenatalcorticosteroids Phase 4

Detailed Description:

In women at 26 to 30 weeks gestation, who are at increased risk for preterm birth and remain undelivered 14 or more days following a single course of antenatal corticosteroids (ACS), are multiple course of ACS every 14 days until 33 weeks effective in reducing the risk of perinatal or neonatal mortality or significant neonatal morbidity, compared to placebo.

18-24 Month Follow-up: Children (18-24 months corrected gestational age) are assessed with the Bayley Scales of Infant Development (Second Edition) to determine neurodevelopmental impairment.

5 Year Follow-up (MACS-5): Children are assessed using the Child Behaviour Checklist (1 1/2 - 5) and the Behaviour Rating Inventory of Executive Function (Preschool version) to determine neurocognitive function.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 1858 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: Multiple Courses of Antenatal Corticosteroids for Preterm Birth Study (MACS)
Study Start Date : April 2001
Actual Primary Completion Date : June 2007
Study Completion Date : December 2011

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Steroids

Primary Outcome Measures :
  1. MACS: Perinatal or neonatal mortality or serious neonatal morbidity
  2. MACS-5: Mortality or survival with severe neuro-morbidities at 5 years of age

Secondary Outcome Measures :
  1. MACS: Death or neurologic impairment at 2 years of age
  2. MACS-5: Measures of growth and blood pressure assessed by clinical exam
  3. MACS-5: At Canadian sites, abnormalities in intelligence and specific cognitive skills (WPPSI-III, Beery: VMI and PPVT-III)

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   14 Years to 45 Years   (Child, Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Women who have previously received one completed course of ACS, at least 14 days ago and continue to be at increased risk of preterm birth
  • Gestational age greater ≥ 26 weeks and gestational age < 31 weeks

Exclusion Criteria:

  • Women requiring chronic doses of corticosteroids secondary to medical conditions
  • Women with a contraindication to corticosteroids
  • Women with clinical evidence of chorioamnionitis (temperature ≥ 38°c)
  • Known lethal congenital anomaly (e.g. anencephaly)

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00187382

Layout table for location information
Canada, Ontario
Data Coordinating Centre, CMICR 790 Bay Street, 7th Floor
Toronto, Ontario, Canada, M5G 1N8
Sponsors and Collaborators
Sunnybrook Health Sciences Centre
Layout table for investigator information
Principal Investigator: Kellie Murphy, M.D. MOUNT SINAI HOSPITAL
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):

Layout table for additonal information
ClinicalTrials.gov Identifier: NCT00187382    
Other Study ID Numbers: FRN: 38142
First Posted: September 16, 2005    Key Record Dates
Last Update Posted: June 15, 2010
Last Verified: June 2010
Keywords provided by Sunnybrook Health Sciences Centre:
antenatal corticosteroids
preterm birth
multiple versus single doses
Additional relevant MeSH terms:
Layout table for MeSH terms
Premature Birth
Obstetric Labor, Premature
Obstetric Labor Complications
Pregnancy Complications