To explore the potential for harmonisation across studies, the Health Study Hub allows you to search and compare variables from different study documents, such as questionnaires and data dictionaries (learn more).
The content of questionnaires, data, and questionnaire items (annotated variables) are categorised according to the classification system developed by Maelstrom Research (learn more). The annotated variables can be browsed by list of areas of information (e.g. socio-economic characteristics or diseases) and the standardised scales/questionnaires used to collect them.