Confidentiality, data storage, security
Measurements were recorded on paper forms which were stored securely in the City Hospital ICU, a restricted security access area. After data collection, the information on the paper forms was collated onto an Excel spreadsheet with each participant allocated a unique de-identified number; paper copies were then shredded. The electronic spreadsheet was stored securely on a National Health Service (NHS) computer and was file and folder password protected. Data was only accessible to, and used by, the study investigators in this study.