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 |
---|---|---|---|---|---|---|---|---|---|
Ishikawa 2024 |
Japan 2005 - 2022 nested case control |
The administrative claims database from JMDC Inc. (Tokyo, Japan), which contains all inpatient (including those during hospitalization), outpatient, and pharmacy claims received from the insurers. | Women whose pregnancies ended in a miscarriage that occurred between the beginning of the fourth and 22nd weeks of gestation. | Women randomly selected from the entire cohort of pregnancies by risk-set sampling with replacement and were individu- ally matched to the cases (3:1). | Exposure were identified according to the WHO-ATC or alternate entries in the administrative claims database from JMDC Inc. (Tokyo, Japan), which contains pharmacy claims received from the insurers. | during pregnancy (anytime or not specified) | 44118 / 132317 | ||
Birth outcomes was unavailable in the Japanese claims database. Pregnancies and birth outcomes were estimated using two methods: the first one was for those whose pregnancy-and birth outcome-related entries were available, and their pregnancies and birth outcomes were estimated using these entries. |
Risk of bias: : NA; : low; : moderate; : serious; : critical; : unclear;