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. 2013 Oct 16;8(10):e78268. doi: 10.1371/journal.pone.0078268

Table 1. Timing of data collection.

Information obtained Year(s) Age
Birth year 1949-51 0
Childhood socioeconomic position (occupation of head of household) 1960 9-11 The National Population and Housing Census of 1960
Cognitive ability, self-reported smoking and alcohol use, BMI; psychologists’ ratings of personality, clinical diagnoses of psychiatric and musculoskeletal disorders. 1969-70 18-20 Conscription examination
Unemployment (number of years with any unemployment benefit 1974-90) 1974-90 23-41 The Income and Tax Register
Education (years attained), income 1990 39-41 The Longitudinal Database of Education, Income and Employment (LOUISE)
Socioeconomic position in adulthood (occupation) 1990 39-41 The National Population and Housing Census of 1990
Job control and physical strain, by occupation 1990 39-41 Job exposure classification systems and LOUISE
Sickness absence 1990-91 (number of days), unemployment 1992-94 (number of days with benefit) 1991-94 40-45 LOUISE
Disability pension (first award) 1991-2008 40-59 LOUISE