Fig. 1

Exclusion criteria and numbers excluded. Note: Initially defined are individuals born 1920–1991, who are present at one census from 1971 to 2011, and match the origins under study. Source: ONS-LS
Exclusion criteria and numbers excluded. Note: Initially defined are individuals born 1920–1991, who are present at one census from 1971 to 2011, and match the origins under study. Source: ONS-LS