Study | Country Study period |
Population source | Exposure definition | Non-exposure definition | Sample size | Rmk |
---|
Study | Country Study period |
Case | Control | Sample size | Rmk |
---|---|---|---|---|---|
Carter, 2008 |
USA 1997 - 2003 |
Cases with selected birth defects (included live births, stillbirths 20 weeks or longer or greater than 500 g, or elective terminations). | Live births without birth defects that were randomly selected from birth certificates or birth hospitals in the geographic regions monitored by the state surveillance systems. | 12274 / 4774 | |
Kerr, 2018 |
USA and Canada 1993 - 2015 |
Infants with microcephaly alone (“isolated”) and microcephaly that included other major birth defects (“non-isolated”). | Nonmalformed live-born infants. | 166 / 12059 | Authors analyzed separately “isolated” microcephaly and “non-isolated” microcephaly. Only isolated microcephaly are indexed in MetaPreg. Cases with chromosomal or syndrome diagnosis and potential congenital infections were excluded. |
Rosa, 1987 |
USA 1980 - 1983 |
Patients aged zero to four years with suspected birth defect diagnoses, pregnancies ending in spontaneous abortions (ICD9 634-634.9). | Deliveries not linked to birth defects. | 6564 / 97775 | Study on the efficacy of azole in an obstetrical indication, including the intrauterine deaths and/or late pregnancy and/or neonatal outcomes that are studied as efficacy criteria rather than safety one. => Not reported here. |
Ross, 2003 |
USA and Canada 1983 - 1988 |
Children diagnosed with acute leukemia (i.e., acute myeloid leukemia, AML and acute lymphoblastic leukemia, ALL) in the first 18 months of life. | Children without leukemia identified through random digit dialing. | 243 / 393 |