Types of study design using the ONS Longitudinal Study 1.Cross-sectional at each census (1971,1981,1991, 2001) 2.Longitudinal: investigating same people at 2+ Census points 3.Longitudinal: fertility, cancer incidence and mortality by Census characteristics before and after the event 4.Cross-sequential : comparing change in two cohorts (e.g. class mobility 1971 to 1991 with class mobility 1981 to 2001) 5.Inter-generational (parental characteristics of sample members in 1971 by their adult characteristics in a later Census)
How to use the LS: conditions imposed by the need for confidentiality Projects are scrutinised by a Board before approval. Each member of project team must be awarded Approved Researcher status specifically for that project. Data are held in secure setting and cannot be downloaded. LS users can visit a secure setting (Angel/Pimlico, London) to analyse data directly. - or send code (e.g. in STATA or SPSS) which will be run for them. Individual-level data cannot leave the secure setting – instead, tables, models or aggregated datasets are released. Outputs are scrutinised for the disclosure of personal information (can limit detail of ethnicity, small-area geography and occupation). Publications and outputs need clearance.