Table 1 Data characteristics
Site | Data source | Nature of source data | Coverage | Time period | Mother–child pairs included, N |
|---|---|---|---|---|---|
Hong Kong | Clinical Data Analysis and Reporting System | Electronic health record from public hospital and clinics | Territory-wide (~11 m) | Births 2001-2014, follow-up until 2020 | 382,338 |
Finland | NorPreSS | National registers | Nationwide (~5.5 m) | Births 2006-2014, follow-up until 2020 | 532,004 |
Iceland | NorPreSS | National registers | Nationwide (~350,000) | Births 2004-2011, follow-up until 2017 | 32,251 |
Norway | NorPreSS | National registers | Nationwide (~5.3 m) | Births 2005-2014, follow-up until 2020 | 575,631 |
Sweden | NorPreSS | National registers | Nationwide (~10 m) | Births 2006-2013, follow-up until 2019 | 790,533 |
New Zealand | Ministry of Health National Data Collection | National registers | Nationwide (~5 m) | Births 2007-2014, follow-up until 2020 | 520,143 |
Taiwan | NHIRD | Insurance claims database | Nationwide (~23 m) | Births 2011-2014, follow-up until 2020 | 789,730 |
