Workplace restructurings in intervention studies – a challenge for design, analysis and interpretation

Table 1 Duration, size and costs of four occupational intervention projects.

	Project period	Companies/organisations/municipalities involved	Worksites	Participants	Research Costs	Researchers employed^§
Stockholm bus drivers	1999–2002	2 companies	3 garages	640 employees	0.25 mill. €	2 (+1)
Copenhagen bus drivers	1998–2003	6 companies at start	20 garages at start	3505 at baseline	2.2 mill. €*	1^\|\| (+6)
Women at work	2000–2004	21 companies/municipalities	31 at baseline	2183 at baseline	2.1 mill. €^†	3^¶ (+4)
Intervention Project on Absence and Well-being	1996–2001	2 municipal organisations 1 private company	52 at baseline	2730 employees 1919 respondents	0.5 mill. €^‡	1 (+2)

* The direct research costs.
^† Half the funding was for research and evaluation, the other half for the interventions.
^‡ Intervention activities were financed by the companies. The municipal workplaces used approx. 0.3 million Euro for external process consultants. All workplaces used money for activities and parts of the staffs working time for meetings, working groups etc.
^§ Numbers in parentheses indicate senior researchers, researchers and research assistants working less than half time on the project or PhD students funded by the project.
^|| The project leader was a senior researcher, employed full time throughout the project, except for one year on leave during the 3^rd and 4^th year of the project.
¶Two research assistants were working on the project throughout the period but the project manager changed in the middle of the project period.

ISSN: 1471-2288