The National Research Centre for the Working Environment, formerly the National Institute of Occupational Health, has conducted the fourth Danish Work Environment Cohort Study (DWECS) covering the five-year period 2000-2005. The 2005 results indicate no clear trend of overall better or worse conditions for workers. Nevertheless, an increase in psychosocial demands at the workplace has been identified, such as a high pace of work, a demanding workload and emotional demands. Conversely, the study also reveals increases in decision latitude, better future prospects in the job and more support for workers from superiors. However, considerable differences among workers persist in relation to jobs, sectors and gender.