Study design

 Year Measurements Source of data
 1990–1DemographicsEmployer's records (1990–1)
 (baseline information)Work characteristics and health behaviourSurvey (November 1990)
Musculoskeletal painSurvey (November 1990)
Sickness absence due to musculoskeletal disordersRecords from occupational healthcare unit
(1 January–31 December 1991)
 1991–3Reduction in the sum of days worked in different job categories* Employer's records (1 January–31 December 1991 and 1 January–31 December 1993)
 (downsizing)
 1993–5Work characteristics and health behaviourSurvey (November 1993)
 (explanatory factors and outcome variables)Musculoskeletal painSurvey (November 1993)
Sickness absence due to musculoskeletal disordersRecords from occupational healthcare unit
(1 January–31 December 1995)
  • *Sum of days worked refers to the sum of days included in all work contracts minus the sum of days legitimately spent away from work (on leave, laid off,  maternity leave, sickness absence). Extent of downsizing is percentage of reduction in the sums of days worked between 1991 and 1993.