Summary of HALCyon cohorts.

*For those participants with a date of birth provided (95 participants were aged 90 or over at baseline and their dates of birth are not recorded). †Approximate size of sample at time that outcome measures for the HALCyon project were ascertained. Note: LBC1921 = Lothian Birth Cohort 1921; HAS = Hertfordshire Ageing Study; HCS = Hertfordshire Cohort Study; CaPS = Caerphilly Prospective Study; ABC1936 = Aberdeen Birth Cohort 1936; ELSA = English Longitudinal Study of Ageing; NSHD = MRC National Survey of Health and Development (1946 British birth cohort); NCDS = National Child Development Study (1958 British birth cohort). For description of sample please see table S1.