Cleft Lip, Cleft Palate
Conditions
Keywords
Cleft palate, Cleft lip, Folic acid, Global Network, Maternal and child health, International, Women's health, Brazil, Brasil, Latin America, ECLAMC, Congenital defects, Pregnancy
Brief summary
Cleft lip and palate are a significant component of morbid human birth defects in the developing world. By supplementing a high-risk group of women with folic acid (4.0 mg versus 0.4 mg) from preconception and continuing throughout the first 3 months of pregnancy in the state of Sao Paulo, Brazil, this study aims to reduce the recurrence of cleft lip and palate.
Detailed description
Craniofacial anomalies and cleft lip with or without cleft palate (CL/P) are a model for the impact of birth defects on fetal and neonatal health directly and maternal health indirectly. Craniofacial anomalies comprise a significant component of morbid human birth defects. The primary hypothesis is that folic acid supplementation of 4mg/day at preconception and during the first three months of pregnancy will decrease the recurrence of nonsyndromic cleft lip with or without clef palate (NSCL/P) in a high-risk group of women when compared to women taking 0.4 mg per day of folic acid. The total sample will include 2,000 women (that either have NSCL/P or that have at least one child with NSCL/P) randomly assigned to the 4 mg versus the 0.4 mg folic acid study groups. The study will also compare the recurrence rates of NSCL/P in the total sample of subjects as well as the two study groups (4mg, 0.4 mg) to that of a historical control group. The primary outcome assessed is the rate of recurrences of NSCL/P in offspring of the trial mothers in each of the two study groups. Secondary outcomes include recurrence of NSCL/P compared to a historical control group; serum and red cell folate levels; severity of NSCL/P in offspring of trial mothers; twinning rate; miscarriage rate; preeclampsia; rates of other birth defects; birth weight; and gestational age. The sample size was based on historic tables of birth rates and the rates of cleft occurrences. The study hypothesizes that a total of 2000 subjects will be enrolled during a 2.5 year period; a dropout rate of 10%; birth rate for group A (women with NSCL/P) of 10% and a rate of 12% for group B (women with at least one child with NSCL/P); risk of cleft for group A is 7% and for group B is 4%; one-sided test with continuity correction.
Interventions
DRUGFolic acid (0.4mg vs. 4.0mg)
Sponsors
Global Network for Women's and Children's Health Research
Bill and Melinda Gates Foundation
National Institute of Dental and Craniofacial Research (NIDCR)
Fogarty International Center of the National Institute of Health
National Center for Complementary and Integrative Health (NCCIH)
National Cancer Institute (NCI)
RTI International
University of Iowa
Hospital de Reabilitação de Anomalias Craniofaciais (HRAC) - Brazil
NICHD Global Network for Women's and Children's Health
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
DOUBLE
Eligibility
Sex/Gender
FEMALE
Age
16 Years to 45 Years
Healthy volunteers
Yes
Inclusion criteria
* All women must reside in the state where the clinic is located. * Women with NSCL/P who attend the craniofacial clinics, who are 16 to 45 years of age (after age 45 fecundity decreases substantially)who attend the craniofacial clinic for their care. * Women (ages 16 to 45 years of age) who have at least one natural child of any age with NSCL/P who receives care at the participating craniofacial clinics.
Exclusion criteria
* Cases resulting from consanguineous couples (first, second, and third degree, i.e., first cousins or closer). * Couples where at least one of the two is definitely sterilized. * Women on anti-epileptic drugs. * Women who are pregnant. * Women who are planning to move outside of the state where the clinic is located within the next year. * Women who are planning to move outside of Sao Paulo state within the next year. * Women who have B12 deficiency (B12 level is below 174 pg/ml or 134.328 pmol/L). * Women who have an allergy to folic acid.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Recurrence of nonsyndromic cleft lip with or without cleft palate (NSCL/P) in offspring of trial mothers | — |
Secondary
| Measure | Time frame |
|---|---|
| Serum and red cell folate levels | — |
| Severity of NSCL/P in offspring of trial mothers | — |
| Twinning rate | — |
| Miscarriage rate | — |
| Recurrence of NSCL/P compared to a historical control group; Overall and high versus low dose | — |
| Rates of other birth defects | — |
| Birth weight | — |
| Gestational age | — |
| Preeclampsia | — |
Countries
Brazil
Outcome results
None listed