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Miscarriage Preventing Herbal Medicines and the Risk of Birth Defects: a Population-based Cohort Study

Pregnancy Clinical Trial

Official title:
Miscarriage Preventing Herbal Medicines and the Risk of Birth Defects: a Population-based Cohort Study

Clinical Trial Summary

Using data from a population-based medicine use cohort in Xiamen, China, this retrospective cohort study will investigate whether herbal medicines used to prevent miscarriage are associated with increased risk of birth defects.

Clinical Trial Description

Herbal medicines have a long history of use for pregnant women both in China and around the world. However, the safety of herbal medicines used at the early gestation is often questioned regarding their impact on offspring. Therefore, the aim of this study is to investigate whether miscarriage preventing herbal medicines associated with increased risk of birth defects. A large medication use cohort will be developed by linking a population-based pregnancy registry (i.e., REPRESENT) and a population-based pharmacy database, which documented all prescriptions at both outpatients and inpatients from conception to delivery. This cohort will include herbal medicines formula which were granted approval by the Chinese National Medical Products Administration. Using data from this cohort, the investigators will investigate the prevalence of the use of herbal medicine formulas and prescription patterns at the first trimester. This study will then investigate the association between miscarriage preventing herbal medicines and the risk of birth defects. A propensity score matching (PSM) based Poisson regression will be used to estimate the relative risk. To ensure the robustness of the results investigators will perform several sensitivity analyses and negative control analyses, such as restricting the population to women with singleton pregnancies, excluding individuals who had undergone in vitro fertilization (IVF), and considering those women who were prescribed herbal medicines during the middle and late stages of pregnancy as the negative exposure control group. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT06048276
Study type Observational
Source West China Hospital
Contact
Status Active, not recruiting
Phase
Start date January 1, 2023
Completion date December 31, 2024
View Details
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