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This paper describes a longitudinal study evaluating organizational changes at a postal sorting terminal in Sweden. One hundred postal workers were followed up for 1 year after the changes were put in place. Information about psychosocial factors, sleep disturbances and gastrointestinal complaints were collected by questionnaires administered at the onset of the changes and at 8 and 12 months later. Sick leave during the 1-year follow up was compared with that during the year before the changes were introduced. A significant increase in skill discretion and in authority over decisions occurred during the study period. The reported increase in skill discretion and authority over decisions correlated with a reduction in difficulties with sleep and with gastrointestinal complaints. Changes in reported contact with team mates and superiors also correlated with changes in the reporting of sleep difficulties and gastrointestinal complaints. There was a significant reduction in sick leave. The results indicate that the organizational changes improved the quality of work and at the same time reduced sick leave and psychosomatic complaints.
Wahlstedt et al. (Wed,) studied this question.