Synthetic data generated to represent the structure of data extracted from the UCLH Electronic Health Record. They are selected tables and fields from the OMOP Common Data Model v5.4 with concept_name columns added for readability.These synthetic data are based on the project 'Pollution in preterm birth' that is looking at the relationships between preterm birth and air pollution. The project is run by Tina Chowdhury who is a Reader in Regenerative Medicine at the Centre for Bioengineering, QMUL.These are low fidelity synthetic data generated using datafaker. The columns are currently generated independently so any relationships between them may be nonsensical e.g. birth dates occurring after death dates.These data are artificially generated, any resemblance to real patients is coincidental.