All eligible study members were contacted.
Provided information | 3,750 | ||||||
Cumulative total of deaths | 290 | ||||||
Cumulative permanent refusals | 146 | ||||||
Temporarily living abroad | 69 | ||||||
Cumulative emigrated | 447 | ||||||
Failure to contact | 660 | ||||||
Data collection was contracted to Social and Community Planning Research whose interviewers requested home visits with all cohort members resident in England, Scotland and Wales. Questionnaires were used to ask about the family in this household and the wider family, and cohort members’ own health, training, employment and skills, earnings, social participation, and social imagery questionnaires. Cohort members were also asked to complete a verbal ability test and the short Maudsley Personality Inventory. Short versions of the questionnaires were sent to those reluctant or unwilling to give enough time for the whole set of questionnaires.
The study team carried out training sessions lasting three days with all interviewers.The interviewers’ instruction manual is available to view.