The common output indicator “above 54 years” does not cover participants aged 54, it only includes persons who are 55 or older when joining the operation. Please note that it is recommended that the full date of birth (day/ month/year) is recorded in order to calculate the age of the participants. Moreover, in order to check the completeness of the data it may be useful to have participants recorded in one of the three age categories (below 25 years old; 25-54 years old; above 54 years old).