| Study | Country Study period Study design |
Data source | Exposure definition | Non-exposure definition | Exposition period | Sample size (exposed/unexposed) Or (case / control) |
Remarks | Risk of bias |
|---|
| Study | Country Study period Study design |
Data source | Case | Control | Exposition | Exposition period | Sample size (exposed/unexposed) Or (case / control) |
Remarks | Risk of bias |
|---|---|---|---|---|---|---|---|---|---|
|
Anderson 2020 |
USA 1997 - 2011 case control |
The National Birth Defects Prevention Study (NBDPS), a US population-based, multisite case-control study. | The case infants were infants born alive or died at 20 SG or more and who had received a diagnosis of at least one selected birth defect. | The controls were live-born infants with no major birth defects who were randomly selected from hospital or state birth-certificate records from the same geographic areas. | Information on exposure to TCAs and other potential risk factors during pregnancy were collected by standardized telephone interviews with mothers of case and control infants, conducted 6 weeks to 24 months after the estimated date of delivery (EDD). | 1st trimester | 30630 / 11478 | 'Infants with recognized or strongly suspected chromosomal abnormalities or single-gene conditions were excluded from the study.' | |
| Case infants were ascertained through population-based birth-defects surveillance systems in 10 U.S. states. Controls were selected randomly from the same geographic areas. Clinical data were abstracted from medical records and classified by clinician geneticists and other clinicians. | |||||||||
Risk of bias: : NA; : low; : moderate; : serious; : critical; : unclear;