The UK Cystic Fibrosis Registry Demographic is made up of data items relating key demographic information about CF patients, relating to their diagnosis and genotype. The UK CF Registry is a centralised database of all 60 CF centres across the UK. Data are manually entered in calendar years by CF clinical teams for the 99% of people with a diagnosis of CF who consent to their data being donated to the Registry. Data are entered onto a secure web-portal. For more information please see www.cysticfibrosis.org.uk/registry and 'Data Resource Profile: The UK CF Registry' published in the International Journal of Epidemiology (2018 Feb 1;47(1)9-10e).